#: locale=en
## Action
### URL
LinkBehaviour_F9D3238B_D3BE_BEC3_41B9_A8A10B9B39C6.source = https://www.infomaniak.com/fr
## Hotspot
### Tooltip
sprite_058C4CC3_2F49_F712_41C2_47CA7AF84894.toolTip = Air filtration (emergency mode)
sprite_27B0FEF8_523A_7B89_41CF_8E44C1DC1E7F.toolTip = Air intake (emergency mode)
sprite_06A81886_2F48_7F13_419F_D5AD78C1FE8B.toolTip = Air/water heat exchanger
overlay_D7F9958E_522E_E986_41C7_F06177D7B3EA.toolTip = Backup power supply
overlay_4A3CA895_6115_5478_41B6_FC21DC34F0E6.toolTip = Cooling regulation
overlay_6ACF59D5_52EE_199A_41CA_BC50555D7CAA.toolTip = Electrical panels (TGBT)
overlay_0E914C1B_2F79_B732_41C4_6E784EB40AD7.toolTip = Emergency battery room
overlay_E408AF8F_C583_4DAC_41DD_E8DE731A3346.toolTip = Heat pumps
sprite_04EE1BFB_2F48_F0F1_4153_766DA4CC7758.toolTip = Hot air extraction (emergency mode)
FlatHotspotPanoramaOverlayArea_3EF201A0_1796_1720_41AA_BC5BE98649A8.toolTip = Pompes à chaleur
overlay_557959B0_4B82_8D08_41C5_A0E32F6C16A7.toolTip = Servers
overlay_0D68DBA5_2F78_D116_41C1_87B79B795DEC.toolTip = Uninterruptible Power Supplies (UPS)
HotspotMapOverlayArea_7E523923_5CEA_F8DD_41D1_6B89F312BADF.toolTip = Visit a cold alley
overlay_324DC499_53DC_341E_41C1_D4DC272A0A61.toolTip = Visit a cold alley
HotspotMapOverlayArea_7F158586_5CFE_2BE7_41D3_E178ECDA197E.toolTip = Visit a hot alley
overlay_35E9385F_16AE_351F_41B2_86466B56105F.toolTip = Visit a hot alley
overlay_344C844E_16AA_1D61_419C_D7A5395ECFEB.toolTip = Visit the air extraction room (emergency mode)
HotspotMapOverlayArea_7EE6A2EF_5CE6_2925_4196_13C11FF6E215.toolTip = Visit the air extraction room (emergency mode)
HotspotMapOverlayArea_7E226AA2_5CEA_19DF_41CB_05358736BCD4.toolTip = Visit the air intake room (emergency mode)
overlay_35D6E662_16AE_1D21_41B3_84E222762FB7.toolTip = Visit the air intake room (emergency mode)
HotspotMapOverlayArea_1FA345DB_53EA_298E_41CF_3E359C88AEE5.toolTip = Visit the battery room
overlay_0F38A197_53A7_CC11_41D1_C7BB4C7AAA8A.toolTip = Visit the battery room
HotspotMapOverlayArea_7E584122_5CE6_28DF_41D5_2D47D7AF56F2.toolTip = Visit the electrical panel room
overlay_3302AF72_53A4_D413_41C4_F461049B9570.toolTip = Visit the electrical panel room
overlay_2E37A782_50AC_74F3_41CB_5AB4A81ABB21.toolTip = Visit the filtration room (emergency mode)
HotspotMapOverlayArea_64D4AB05_5D26_78E5_41CA_1FC78A1A824A.toolTip = Visit the filtration room (emergency mode)
HotspotMapOverlayArea_7EF3A04F_5CE9_E965_419E_F1258FAAE026.toolTip = Visit the heat pump room
overlay_1E9577EC_0334_4AD0_4188_03DA733B5FE1.toolTip = Visit the heat pump room
overlay_0CFE16D7_53A4_F411_41D2_D90A03A6E6FD.toolTip = Visit the inverter room
HotspotMapOverlayArea_7E781DDF_5CE6_3B65_41AA_C5EFC9CC5DE2.toolTip = Visit the inverter room
overlay_679A1341_5D2F_EF5C_41C9_EEF550441235.toolTip = Visit the room that enhances cold
HotspotMapOverlayArea_64F7A30D_5D3A_68E5_4182_50ACF909C279.toolTip = Visit the room that enhances cold
HotspotMapOverlayArea_7EA7E6CE_5CE6_E967_41C2_8CF49C88DEBD.toolTip = Visit the room that extracts hot air
overlay_0FA6B4DF_53A4_D411_4188_2986B70BC1F1.toolTip = Visit the room that extracts hot air
HotspotMapOverlayArea_6428F578_5D3B_EB2B_41C7_645E712E0731.toolTip = Visit the room that recovers heat
overlay_6563589C_5D2A_19EB_41C2_A32174549031.toolTip = Visit the room that recovers heat
HotspotMapOverlayArea_66896512_5D3A_E8FF_4194_33DD2DBA7307.toolTip = Visit the room that regulates the cooling
overlay_660B6DF8_5D26_1B2B_41D5_0E81C3FC81F0.toolTip = Visit the room that regulates the cooling
overlay_647AEE46_5D2E_F966_41D5_252816D524DD.toolTip = Visit the room with the check valves
HotspotMapOverlayArea_64BC63E8_5D3A_2F2B_41D2_84FE45367A98.toolTip = Visit the room with the check valves
overlay_0F2967D2_53A4_5413_41D0_8C53578184EF.toolTip = Visit the room with the check valves
HotspotMapOverlayArea_7EC656E4_5CE6_E95A_41C5_B0109D85007F.toolTip = Visit the room with the check valves
overlay_280F8482_50AC_54F3_41CE_048B1ACD7066.toolTip = Visit the ventilation room (emergency mode)
HotspotMapOverlayArea_646E026D_5D39_E925_41D1_5A47D75FD003.toolTip = Visit the ventilation room (emergency mode)
## Media
### Floorplan
### Image
imlevel_E639B78C_C1F0_8EAD_41E5_FFA183D2959E.url = media/map_10D977FB_5063_F412_41C1_5A7D65D6C893_en_0.jpg
imlevel_E639978C_C1F0_8EAD_41DB_4F47280DDB65.url = media/map_10D977FB_5063_F412_41C1_5A7D65D6C893_en_1.jpg
imlevel_E639778C_C1F0_8EAD_41DD_FBDB030E08DD.url = media/map_10D977FB_5063_F412_41C1_5A7D65D6C893_en_2.jpg
imlevel_E639678D_C1F0_8EAF_41E5_0BF663CD30EE.url = media/map_10D977FB_5063_F412_41C1_5A7D65D6C893_en_3.jpg
### Subtitle
panorama_1C8BD585_066F_E074_416B_73FE40638BD4.subtitle = Transformateurs électriques
### Title
panorama_1F9C32AC_066D_21B5_4184_14F52CE9FA6E.label = 001
panorama_1F548C74_066E_E094_4187_43795FBF03B0.label = 002
panorama_1F041122_066F_20AC_418F_8E0A7D74C17F.label = 003
panorama_1F30F54A_066F_60FD_418E_A6DE10DDC716.label = 004
panorama_1C8BD585_066F_E074_416B_73FE40638BD4.label = 005
panorama_1CAB4BC6_066F_27F4_4195_D7D882AB491E.label = 006
panorama_1C6187B8_066F_6F9C_4180_D55D8088713F.label = 007
panorama_1C263602_066E_E06C_418E_B2FB3CBEAAD7.label = 008 corridor
panorama_1DEED365_066D_60B4_4190_BEE1BDB3DB8C.label = 011 corridor
panorama_1DF8C623_066D_20B3_4199_47D23984AAB7.label = 012
panorama_1DA7A25A_066D_E09D_4182_9D4A41B7C570.label = 013
panorama_1D5CE08D_066D_2074_4189_061D2FC5FA0F.label = 014
panorama_1D113295_066D_6197_4190_5E9065046DD6.label = 015 corridor
panorama_1D3E8DEB_066D_63BC_4192_08C972ADACB9.label = 017
panorama_32718ADE_2C47_18C8_41C5_1077CB0BCFD7.label = 018
panorama_1A83DDD1_066D_23EC_4174_B857C9A2AA0B.label = 019
panorama_1AB36A0B_066A_E073_4111_135E4A204788.label = 020
panorama_1A7EAD69_066B_20BC_417C_966D58B04264.label = 021 corridor
panorama_3272AC35_2C45_3F5B_41C1_7884D2948893.label = 022
panorama_B6CF82E9_9877_6E49_41DE_0C16711DBC89.label = 023
panorama_1BC7777C_066B_2094_4182_FC342DB5FABE.label = 024
panorama_1B428709_066B_607F_4190_D9DF8AF815C2.label = 025
panorama_1B4E468F_066B_2073_4190_D88D987DDEC0.label = 026
panorama_1B31E404_0675_2074_418C_C797BD101730.label = 027
panorama_188D823C_0675_E094_419A_2151044D1B26.label = 028
panorama_18419232_0675_20AC_4191_4F97F3103240.label = 029
panorama_181648A8_0675_61BC_4181_6F8E571EB372.label = 031
panorama_182D8564_0675_20B4_4196_885C1C6096FD.label = 032
panorama_19EF3810_0676_E06C_4192_1D07976F8AB8.label = 033
panorama_198EF618_0677_209C_4190_B2E897DDDC18.label = 034
panorama_194523C7_0677_67F4_4190_2B870659AE96.label = 035 corridor
panorama_19746057_0677_2094_418A_D99EB6E33BC4.label = 036
panorama_192C621A_0677_E09C_4187_303D11E242B6.label = 038
panorama_26DB44EE_0677_21B4_4199_86D5B0043EFA.label = 039
panorama_268D068F_0677_6073_4188_612A52C4FC2E.label = 040 corridor
panorama_266887FB_0676_EF93_4176_645E253B7B60.label = 041
panorama_26016E45_0675_20F4_4160_8820788833BD.label = 042
panorama_26201D77_0675_6094_4197_13CB4AADB4C2.label = 043
panorama_27D34C2A_0675_20BC_4194_649C07E6C8AB.label = 044
panorama_279FFEA7_0675_E1B4_4193_78212845F9AE.label = 045
panorama_27B8EE41_0675_20EC_4196_A52258AD7B94.label = 046
panorama_27774B53_0675_60EC_4188_D5795836B266.label = 047
panorama_272DBEC3_0675_21EC_417E_65513A75CD4B.label = 048
panorama_44F951BC_10ED_9A5B_41A4_54C910205C54.label = 049
panorama_5619CB0B_10A5_76F8_417D_B99653DA3EC9.label = 050
panorama_5991CEDD_10DC_87D5_41B0_2F8281C7B2E1.label = 051
panorama_241D265D_067B_E094_418C_9F2A4CBACEB2.label = 052 corridor
panorama_2425FBDE_067B_2794_418B_8553C554C521.label = 053
panorama_32719E61_2C4B_FBF8_41BE_4F4C2BA6F589.label = 054
panorama_675BFA9B_0A2B_2193_417B_F2693F7E0CE1.label = 055
panorama_6790172F_0A2B_20B3_419A_E32918E263D4.label = 056
panorama_3271A080_2C4B_2738_41B9_78CD57E8E106.label = 057
panorama_3271DBE4_2C4B_18F8_41B4_2E118176DE44.label = 058
panorama_3271A716_2C4B_6958_41C6_1A540C6FFF8B.label = 059
panorama_3271A27B_2C4B_6BC8_41C0_C033D5347697.label = 060
panorama_32719E12_2C4B_1B58_41B2_962281919F58.label = 061
panorama_32714AD3_2C4B_38D8_41BD_C12870DAF3A7.label = 062
panorama_32714617_2C4B_2B58_41A4_8C9209A65312.label = 063
panorama_3276D253_2C4C_EBD8_41C4_ECDD2D02A4DC.label = 064
panorama_32769D64_2C4C_F9F9_41B7_D71A050F222B.label = 065
panorama_3276A8DC_2C4D_18C8_41C4_7779622AFFA6.label = 066
panorama_327693ED_2C4D_28C8_41BE_98BA1C7AB003.label = 067
panorama_25919B72_067B_20AC_4188_10EB0E22AA2E.label = 068 corridor
panorama_25989F88_067A_E07C_4190_4ECE7AEC3C4D.label = 069
panorama_22081C2F_3293_5BD5_41C2_2A8101EA9DF3.label = 070
panorama_3276A374_2C4D_69D8_41B2_9C2EF423DF14.label = 071
panorama_32774F3C_2C4D_1948_41C4_34851CD144C8.label = 072
panorama_25B78FB4_067D_1F94_4184_AB9A099AD12C.label = 073
panorama_3253A593_061F_2393_4198_0CC6D5B0CA74.label = 074 corridor
panorama_34FCA1AC_061F_23B4_4177_037B09F1BB24.label = 075
panorama_34BE7195_061F_2394_4182_96103A320612.label = 076
panorama_25054BDD_067D_2794_4166_C499F9BC3982.label = 077
panorama_2291A193_3293_4CCD_41A0_0CF5CCB2B90B.label = 084
panorama_20298352_3394_CC4E_41AA_83D00F53365C.label = 085
panorama_32773E97_2C4D_3B58_41B1_B39E2A52F123.label = 086
panorama_2237C978_3293_DC3A_4195_A6DCADB240B3.label = 087
panorama_03D82C11_2C3D_7F58_41C3_B872C2367367.label = 089
panorama_3276F6F1_2C4C_E8D8_41BD_CF7B813A527C.label = 090
panorama_3276C1F0_2C4C_E8D8_41C1_E44B0C6B6DA8.label = 091
panorama_32710D89_2C4F_1948_41B9_9E3E33A1598D.label = 092
panorama_22C9488C_067D_E074_4191_FA2C7765C9FA.label = 094 corridor
panorama_22F56944_067D_60F4_4184_AC749FF7C554.label = 095
panorama_2291CE59_067D_209C_4198_954B025513E3.label = 096
panorama_224D00F3_067E_E1AC_4181_DA1CECFD3A36.label = 097
panorama_227C51EA_067F_23BD_4169_7F1CFC847589.label = 098 corridor
panorama_2226A6FD_067F_6194_417D_081128AEB608.label = 099
panorama_23ED296C_067F_20B5_4187_823A823B93F0.label = 100
panorama_2399D974_067F_E094_4184_7B35CD28DFC3.label = 101
panorama_235456F5_067F_6197_419B_22303C466868.label = 103
panorama_338D5E3D_066D_E094_4161_BC334D266B56.label = 104
panorama_34E9B28D_066D_6077_4196_308FF243DB17.label = 105
panorama_327138CA_2C4F_38C9_41A4_A05944CB2E90.label = 106
panorama_231F2C55_067F_2097_4179_5E2BA13FCA47.label = 107 corrdior
panorama_23314E8B_067E_E07C_418A_B2CC1861A0F3.label = 108 corridor
panorama_2087471C_067D_2094_419A_EE45A9B25579.label = 109
panorama_327127CC_2C4F_68C8_41C5_698B70935B62.label = 110
panorama_20A1A582_067D_606C_4191_11A8F5F856F3.label = 111
panorama_206C0ACB_067D_21F3_4171_E647412F9A90.label = 112
panorama_2013C947_067D_E0F3_4164_5E0F5FBC5EC5.label = 113 corridor
panorama_21C6D7C2_067D_2FEC_419A_82FDA6322B22.label = 114
panorama_21F616EA_067D_61BD_4185_9541759BB4B3.label = 115
panorama_21A0843B_067D_209C_418F_F737008398FA.label = 116
panorama_6CAF5ACB_0617_61F3_418C_FB202AA6A046.label = 117
panorama_2112E471_067B_20AC_4147_7E6F04DD0EDD.label = 118
panorama_2E673887_067B_2074_4192_741AD192C33B.label = 119
panorama_2EBCE9C6_067B_E3F4_418A_EB1B8C8F9EC5.label = 120
panorama_2EA5C539_067B_209C_4196_71E217B20DAC.label = 122
model_A7CD0A81_B6CD_FDE8_41DD_66B984FBF96B.label = 3D
map_10D977FB_5063_F412_41C1_5A7D65D6C893.label = Floorplan
panorama_9E8DF6B2_BD1E_E680_41D5_344DE0025007.label = triggle open LANDING PAGE
## Skin
### Button
Button_70214D3E_2360_183D_41A6_660DA04229D2.label = Air filtration (emergency mode)
Button_736896ED_2360_285F_41A0_699DC66FDBEF.label = Air intake (emergency mode)
Button_62FDA064_23A0_684D_41BA_06F2D79350A6.label = Air/water heat exchanger
Button_19796440_2ECE_0EB0_41A8_ADBFC44AC264.label = Alimentation de secours
Button_161081DD_2EC6_0950_41A1_BBE8BE6C06BE.label = Arrivée d’air (mode secours)
Button_736C6F25_23A0_19CF_41A0_F1D2683A4CEE.label = Backup power supply
Button_62259B84_23A0_F8CE_4199_C478BBF3FC83.label = Cooling regulation
Button_76F5B94F_5D2E_1B65_41AA_BF20C4D4E62C.label = EN
Button_76F5394D_5D2E_1B65_41A5_A56742164348.label = EN
Button_73750445_2360_284F_41BB_99A0AA378DBE.label = Electrical panels (TGBT)
Button_73516AE9_23A0_1847_41C0_5B03F9594470.label = Emergency battery room
Button_011D2B04_21A0_19CD_41B3_05F1A75A5301.label = Extraction de air chaud (mode secours)
Button_772D5D97_5D2E_1BE5_41C0_C01EE1CC83F9.label = FR
Button_772E9D90_5D2E_1BFB_4192_6C1714D6A218.label = FR
Button_16B92F9A_2EC6_19D1_41BE_DA91A8670B32.label = Filtration d'air (mode secours)
Button_62D51E9B_22A0_38FB_41A4_3F3F30DFBCDC.label = Heat pumps
Button_6765634C_5064_4C77_41AE_4AE8FC471041.label = Hide the ceiling
Button_6765634C_5064_4C77_41AE_4AE8FC471041.pressedLabel = Hide the ceiling
Button_66E695CB_23A0_285B_41C0_48EEB7111DE6.label = Hot air extraction (emergency mode)
Button_190D05BF_2ECA_09CF_41B5_63E438B1AE65.label = Onduleurs (UPS)
Button_D3805ABE_C585_57EF_41E6_914D0EBC356A.label = Pompes à chaleur
Button_170C0FE6_2EC6_1970_41C0_7E6B4B820489.label = Régulation du refroidissement
Button_187875F7_2ECE_095F_41C1_B9D68AC97362.label = Salle de ventilation (mode secours)
Button_18A024D2_2ECE_0F51_4193_BFC1FA05853B.label = Salle des batteries de secours
Button_CAEA4FAF_D51D_1EBB_41DA_9E4473B345A8.label = Servers
Button_721FB64C_2360_685D_419F_C75FE3175E51.label = Serveurs
Button_CFC4408A_50E4_4CF3_41BC_78392B3939D6.pressedLabel = Show the ceiling
Button_CFC4408A_50E4_4CF3_41BC_78392B3939D6.label = Show the ceiling
Button_DDACFE97_D357_86C3_41E7_1BBAF4599A50.label = Start
Button_F0BF279B_E732_A068_41C2_77C7502776B1.label = Start the tour
Button_165C91AF_2ECA_09F0_41C6_3B0D96AC6111.label = Tableaux électriques (TGBT)
Button_723D9D5D_2360_187F_41AB_EB6E1C3C85A9.label = Uninterruptible Power Supplies (UPS)
Button_72B685CC_23A0_685D_4197_CAF318570E07.label = Ventilation room (emergency mode)
Button_17641FF5_2EFA_1950_41B8_3CFB5B8D3734.label = Échangeur air/eau
### Image
Image_01181B05_21A0_19CF_41B5_E7A4CBCD0CFF.url = skin/Image_01181B05_21A0_19CF_41B5_E7A4CBCD0CFF_en.jpg
Image_06BD452F_5C21_A835_41BD_AF3F126910E5.url = skin/Image_06BD452F_5C21_A835_41BD_AF3F126910E5_en.jpg
Image_60122B46_5701_8321_41CD_896DC1A9F0C4.url = skin/Image_60122B46_5701_8321_41CD_896DC1A9F0C4_en.jpg
Image_6185AFAA_E96F_DFA8_41D0_89D082694166.url = skin/Image_6185AFAA_E96F_DFA8_41D0_89D082694166_en.jpg
Image_6791B4CD_5706_8520_4192_88760FE9C115.url = skin/Image_6791B4CD_5706_8520_4192_88760FE9C115_en.jpg
Image_69353325_5707_8360_41D5_53CE2AB57BC2.url = skin/Image_69353325_5707_8360_41D5_53CE2AB57BC2_en.jpg
Image_6DF3496A_573E_8FE1_41CC_38FC9938618C.url = skin/Image_6DF3496A_573E_8FE1_41CC_38FC9938618C_en.jpg
Image_71564ABD_525E_1B8A_41B0_0634552791C0.url = skin/Image_71564ABD_525E_1B8A_41B0_0634552791C0_en.jpg
Image_BB56744E_E757_60E8_41EC_814C878E320D.url = skin/Image_BB56744E_E757_60E8_41EC_814C878E320D_en.jpg
Image_BBCFBE74_E752_A0B8_41D6_9A02A4535DB6.url = skin/Image_BBCFBE74_E752_A0B8_41D6_9A02A4535DB6_en.jpg
Image_C074E5A7_D35E_9AC3_41DC_04BA960BBCAF.url = skin/Image_C074E5A7_D35E_9AC3_41DC_04BA960BBCAF_en.png
Image_C4CDA1A3_E753_A059_41EA_6515E73E887F.url = skin/Image_C4CDA1A3_E753_A059_41EA_6515E73E887F_en.jpg
Image_C92EA6B2_E202_DCB0_41CC_D44009902DB9.url = skin/Image_C92EA6B2_E202_DCB0_41CC_D44009902DB9_en.png
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HTMLText_981E8D8F_E936_A068_41CC_D46BE404BDC0.html = Air filtration (emergency mode)
ePM1 filters 70% HoKu-10T v21, manufactured by Tecnofil AG
in Switzerland.
Air intake (emergency mode)
Air/water heat exchanger
Custom system designed with industrial heat exchangers made in Italy, and tailored to the specificities of the Geneva heating network (CAD).
Backup power supply
Margen generators, assembled in Italy. The MTU engines come from Germany and the Lanz alternators come from Italy.
Electrical panels (TGBT)
Siemens, made in Germany.
Emergency battery room
EnerSys DataSafe HX+ VRLA (Valve-Regulated Lead-Acid), manufactured in France or the United Kingdom.
Enter the future of data centers
You are about to discover a global innovation that has been in production since November 2024! A next-generation data center that…
• operates solely with local renewable energy,
• reuses 100% of the energy it consumes to heat homes,
• cools down without water or dedicated air conditioning, and
• integrates discreetly into the heart of cities.
Do you want to replicate this innovation or study it? Everything has been documented in open source by EPFL, IMD, and the University of Lausanne on d4project.org
This data center demonstrates that digital technology can become a source of value for the community by returning its energy and integrating more sustainably into its environment.
Heat pumps
Heat pumps, manufactured in France, with a unit power of 1.7 MW.
Hot air extraction (emergency mode)
Servers
DELL and HPE servers assembled in Europe with components
made in Asia.
Uninterruptible Power Supplies (UPS)
ABB MegaFlex DPA 1500 kW, manufactured in Switzerland.
Ventilation room (normal mode)
Ebmpapst fans, made in Germany.
• Environmental impact:
◦ 0 direct CO₂ emissions
◦ 100% of the heat reused
◦ 200% carbon compensation through myclimate
• Avoided emissions:
◦ 3,600 tons of CO₂ per year compared to heating equivalent to natural gas.
◦ 5,500 tonnes of CO₂ per year compared to pellet heating.
An award-winning innovation
• Swiss Ethics Prize 2023
• Cantonal Prize for Sustainable Development 2023 (Geneva)
At Infomaniak, the lifespan of a server can reach 15 years thanks to refurbishment and component replacement. This is essential, as purchasing a new server is the main source of pollution: its manufacturing emits up to 2.5 tons of CO₂, while its use generates almost none since the data center operates exclusively with 100% renewable energy.
Fans, along with filters and air ducts, form the respiratory system of the data center: together, they ensure that air always circulates in the right direction, under controlled pressure.
In a data center, ensuring the supply and reliability of electrical power is just as crucial as removing — or ideally recovering — all the energy it generates in the form of heat.
In a data center, fires never start from the servers, but from the batteries. That’s why here, they are enclosed in airtight cells, continuously cooled, equipped with fire doors, an automatic fire extinguishing system, and based on lead technology, not lithium. Everything is designed to contain the danger, without ever interrupting operations.
In case of a power outage, our generators take over; and when the grid needs it, they support Swissgrid. Here, energy flows in both directions.
In the virtual world, a data center performs computing and storage. In the real world, it does just one thing: convert electricity into heat. 1 watt of electricity consumed equals 1 watt of heat to be dissipated.
In this data center, the originality lies in using both sides of the heat pump: the heat produced is used to heat the city, while the cold generated is used to cool the servers.
Like a voltage regulator in a high-end hi-fi system, the UPS units protect the data center’s sensitive equipment by ensuring a stable and uninterrupted power supply.
UPS systems each containing 6 ASI Megaflex modules with a unit power of 250 kW, for a total capacity of 2 × 1.5 MW.
The air/water exchanger is the nerve center of the data center. It transforms the heat from the servers into hot water for district heating, while ensuring the continuous cooling of the air circulating in the server room.
When the hot air (≈ 45°C) exits the servers, it is drawn in and passes through the heat exchanger. Its heat is transferred to water, which rises to about 38°C before being sent to the heat pumps. In return, these pumps cool the water circuit to about 28°C. This cooler water returns to the heat exchanger, where it cools the air before it is reintroduced under the technical floor of the server room.
• The system is designed to operate in a closed loop, with no water loss.
• In the event of an emergency, the data center’s backup mode allows hot air to be expelled directly outside through a wall of fans, ensuring operational continuity even if the heat exchanger were to fail.
• The heat exchanger was tested under extreme conditions using load banks to simulate the heat generated by 10,000 machines before going into production.
The batteries operate in tandem with the UPS units. In the event of a power outage, the UPS systems instantly detect the anomaly and switch to the batteries, which immediately take over. They keep all servers running during the few minutes required for the backup generators to start.
• Nominal voltage: 12 V and power of 600 W per element.
• Estimated lifespan: 10 to 12 years.
The electrical power supply reaches the site through two independent feeds at the medium-voltage transformer level. These two separate sources secure the upstream supply to the building. They then feed the Main Low-Voltage Switchboards (MLVS), which distribute electricity to all equipment: servers, heat pumps, ventilation systems, UPS units, etc.
Unlike a domestic installation, the entire electrical distribution chain is redundant. Service continuity relies on a comprehensive architecture: dual upstream feeds, UPS systems with batteries, and backup generators. In the event of a failure on one line, the switchover is not instantaneous. The UPS batteries provide uninterrupted power during the time required for the backup generators to start up. The generators then take over if the outage continues.
This chain (dual power supply, UPS systems, batteries, and generators) ensures the level of electrical continuity required by a data center, even in the event of a grid incident.
The heat exchanger acts as the “lungs” of the data center: under normal
operation, it both cools the servers and fully recovers the heat produced by injecting it into the heating network, within a closed-loop system where all the energy is reused.
This is where the water from the closed circuit arrives, carrying the thermal energy recovered from the data center. This water is neither consumed nor discharged: it circulates solely to transport the heat. The heat pumps raise its temperature in order to inject it, via a heat exchanger, into the district heating network of Geneva, while also producing the cold necessary for cooling the servers.
In heat pumps, the refrigerant is compressed and transfers its heat to a dedicated and closed water loop, used exclusively for transferring energy to the district heating network. This loop heats the water to 67 °C in summer and up to 82 °C in winter. The very hot water then passes through a water-to-water heat exchanger, where its heat is transferred to the urban network without mixing the waters.
In parallel, the refrigerant expansion in the heat pumps cools another water flow to about 28 °C, still in a closed circuit. This water returns to the air/water exchanger loop to capture the heat released by the servers and ensure their cooling.
District heating also constitutes an independent and closed loop. It arrives at D4 at about 55 °C after heating the buildings. At the water/water heat exchanger, it recovers the calories provided by the data center, then returns at 67–82 °C, ready to supply the community again. After use, the water returns to D4 to be reheated, and the cycle continues continuously.
• Everything operates in a closed circuit, without water loss.
• PUE (Power Usage Effectiveness) of D4: about 1.1, making it one of the best in the world (1 kWh consumed = only 0.1 kWh for infrastructure).
• ERE (Energy Reuse Effectiveness) close to 1, as 100% of the produced heat is reused: no energy is lost.
• Capacity for reinjection into the district heating network: 1.7 MWh.
• Expected energy efficiency: COP of 4 to 5 (each 1 kWh of electricity consumed produces 4 to 5 kWh of thermal energy).
• A portion of the heat is supplied directly at cost price to the cooperative La Bistoquette, built above the data center. The rest is transmitted to the SIG network of the canton.
• This energy model is designed for the long term: it balances over 20 years, with a return of 5% that only covers the technical and financial costs related to the heating elevation, with no profit for Infomaniak. All the energy is sold at cost price to the community.
• These PACs have been tested and validated in Trane's laboratories in Charmes, France, ensuring high reliability performance even in these demanding operating conditions.
This room can accommodate about 10,000 machines whose role is to continuously calculate, process, and store data without interruption, while ensuring performance and security.
Here, the challenge is to maintain the servers at an optimal operating temperature without air conditioning. Cold air is blown in from the technical floor and directed only towards the front of the machines. This air passes through the servers, absorbs their heat, and exits at the back at around 45°C. This warm air is then collected in the hot aisles and guided towards the ceiling, where it is redirected into the room with the air/water heat exchanger. Thanks to this strict separation of hot and cold air flows, there is never any mixing, which maximizes energy efficiency and allows for the recovery of 100% of the heat produced by the servers.
This room ensures the extraction of hot air produced by the servers and technical equipment. Under normal operation, this air is routed to the air/water heat exchanger for energy recovery. In emergency mode, it is expelled directly outdoors through this shaft, ensuring continuous cooling of the data center even if the heat recovery circuit is shut down.
• Hot air is discharged outside only when energy recovery is not possible. This exceptional situation occurs only during major maintenance operations or a complete shutdown of the heat pump system.
• Surface openings of 3 × 3 meters to extract a sufficient volume of air.
• Acoustic design with metal walls and rock wool insulation to prevent any noise disturbance to the residential neighborhood located above.
This room forms the heart of the data center cooling system. It manages the vertical circulation of air and controls two distinct sources:
• The closed-loop circuit for recycling server air,
• The supply of filtered outdoor air, used only when conditions require it.
Regardless of the operating mode, air is always supplied to the servers from below, under the raised technical floor. The difference between the modes therefore lies not in the direction of the airflow, but in the origin of the supplied air.
Under normal operation, cooling relies on a closed air circuit:
1. Air heated by the servers is captured at high level in the hot aisles.
2. This hot air is directed to the air/water heat exchanger, which transfers the thermal energy to the heat pumps in the form of water.
3. Cooling is provided by cold water at 28 °C produced by the heat pumps, with cooling being a by-product of the thermal energy recovery process.
4. The airflow returns to the air/water heat exchanger, and the cooled air is then supplied under the raised floor and distributed into the cold aisles at a target temperature of 28 °C.
In this mode, server air circulates in a closed loop: it is captured, recovered, and cooled by the heat pumps, then reinjected without any intake of outdoor air.
When operating conditions require it (for example, during maintenance or when the district heating network is temporarily unable to recover all the thermal energy produced), the system can automatically switch to backup mode:
1. Outdoor air is drawn in, filtered, and introduced at floor level.
2. This air is used to supplement or temporarily replace the closed-loop circuit.
3. It is then supplied under the raised floor toward the cold aisles.
This mode provides a complementary solution, but the standard operation of the data center relies on a closed air circuit, with no conventional air conditioning and no hot air discharge.
Motorized non-return dampers ensure the airtightness of the closed circuit, prevent any uncontrolled mixing, and guarantee a strictly controlled direction of airflow.
This room houses the fuel tank that supplies the generators located on the roof. These generators ensure the data center’s power supply in the event of a total grid outage. Combined with the solar power plants installed on the buildings, they guarantee the site’s energy continuity under all circumstances. When not used for the data center, the generators can be remotely controlled by Swissgrid to provide backup power to the national grid, thereby preventing unnecessary overproduction at other power plants.
• Double-walled tank with automated supply pumps, European manufacturing.
• Three generators on the roof, weighing about 11 tons each. Industrial railway-type engines designed for a lifespan of over 40 years.
• The generators rest on a decoupled slab to absorb vibrations, and internal silencers reduce noise almost completely.
• Redundant operation: 2 groups are sufficient to power the data center at full load, the 3ʳᵈ serves as a backup.
• 3 solar power plants installed on the D4 buildings, producing renewable electricity for ongoing operations and backup batteries.
• Meyer Burger solar panels (Switzerland / Germany) installed on the roofs of the site and neighboring buildings, contributing to the power supply of the data center and the charging of batteries.
• The system has been designed to never depend on a single source of energy: the electrical grid, solar power, batteries, and generators form a redundant chain.
• Every month, the generators are tested at full power to ensure they can start instantly and take over without interruption.
This room houses the powerful fans that ensure the circulation and control of airflow throughout the data center. Under normal operation, they support the controlled ventilation of hot and cold aisles. In backup mode, they become the main cooling engine by pushing outside air through the filters and towards the servers.
• Complete redundancy: multiple units installed in parallel ensure the continuity of the airflow, even in the event of a fan failure.
• Pressure and temperature sensors continuously monitor the airflow to adjust the power of the fans and prevent any internal turbulence.
• In winter, a portion of the warm air can be mixed with the outside air to prevent the temperature from dropping below 10 °C, a critical threshold for the servers.
• Each fan is capable of moving several tens of thousands of cubic meters of air per hour (22,105 m³/h at full load).
This room is only used in emergency mode, when the main heat recovery system is temporarily shut down. It receives outside air, propelled by powerful fans, and filters it before it is distributed in the cold aisles of the servers to ensure their cooling.
• High-efficiency filters to block dust, pollen, and fine particles.
• Check valve system to prevent hot air from flowing back.
• This mode is only activated in emergency mode, during a revision of the heat pumps or in the temporary unavailability of the SIG heat network.
• Even in degraded mode, the data center remains fully operational: outside air provides natural cooling without resorting to mechanical air conditioning.
This shaft acts as the thermal relief valve of the data center: invisible from the outside, it allows the servers to remain operational under all conditions.
This well is like the "nose" of the data center: it allows it to breathe in outside air when its normal operation is interrupted and it must switch to backup mode.
This well is like the "nose" of the data center: it allows it to breathe in outside air when its normal operation is interrupted and it must switch to backup mode.
This well is like the "nose" of the data center: it allows it to breathe in outside air when its normal operation is interrupted and it must switch to backup mode.
Under normal operation, the data center is not cooled using outside air: cooling is ensured by the closed-loop heat recovery system. When this system is temporarily unavailable, this room can then intake large quantities of outside air. It serves as the main air intake, where the air is filtered and then directed toward the cold aisles to cool the servers directly.
• Openings of 3 × 3 meters on the surface to capture an air volume of up to 410,000 m³/h at full load.
• Sound trap with metal walls and rock wool to prevent any noise disturbance to the residential area located above.
• Computing power: 1.25 MW (approximately 10,000 servers)
• Valued thermal power: 1.7 MW (≈ 12,000 MWh/year)
• Number of heated housing units: up to 6,000 Minergie A equivalents
• Energy efficiency:
◦ PUE ≈ 1.1 (among the best in the world)
◦ ERE ≈ 1, because 100% of the heat is recovered.
◦ COP of heat pumps: 4 to 5
• Operating temperatures:
◦ Cooled air: 28 °C
◦ Hot water sent to the network: 67 °C (summer) to 82 °C (winter)
◦ Return water from the network: 55 °C
• Power supply:
◦ 100% local renewable energies
◦ 3 Meyer Burger solar power plants installed on the buildings
◦ Connection to Swissgrid to support the national grid in case of peak consumption.
• Backup infrastructure:
◦ Margen (Italy) generators of 11 tons each
◦ Double-walled tanks
• Cooling without water or mechanical air conditioning, only air + heat pumps
• Start of site search: June 2019
• Commissioning: 2024
• Inauguration: January 2025
• Total project cost: 12 million CHF (including 6 million for underground construction and heat level adjustments)
• 1.8 million in grants from the Geneva Cantonal Office of Energy
• 1.3 million in advance payment from the SIG