System classification. Company. Ariston Thermo S.p.A Keymark lic.no. if available - Store name. length. width. Gross. Company. Name.

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1 Area (AG) length width Total nominal volume height width depth Auxiliary heated volume Electrical aux. heating power Page 1 of 8 Summary of EN SOLAR SYSTEM test results Annex to Solar KEYMARK Certificate Brand (optional) Ariston Thermo S.p.A. ARISTON Street Via A. Merloni 45 Postal Code Fabriano Licence Number Issued System classification Application(s) Hot water Solar loop, circulation principle Thermosyphon Direct solar loop / heat exchanger Heat exchanger Open, vented or closed solar loop Closed Drain back/down Always filled (no drain) Store location Outdoor Store orientation (of main axis) Horizontal Type of auxiliary heating (internal back-up heat) Electric If other auxiliary/internal back-up heating, please specifiy: Solar+supplementary OR Solar-only / Solar pre-heat Solar only / Solar preheat Collector(s) Ariston Thermo S.p.A Keymark lic.no. if available 011-7S2614 F Per module 011-7S2818 A Country Italy public.relations@aristonthermo.com Tel. / Fax / -40 Heat store(s) Ariston Thermo S.p.A Keymark lic.no. if available - Store name m² mm mm litres mm mm mm litres kw Kairos CF Solar Enemeled Tank 150 L Solar Enemeled Tank 200 L Solar Enemeled Tank 300 L Solar loop controller Keymark lic.no. if available - - Name - Solar loop pump - power range - W Kairos CF2.0-1 Solar Enemeled Tank 150 L - W to Solar loop fluid Recommended/required Required - Name water + propylene glycol Freezing point -15 C Number of collectors in each configuration for each store Store name Solar Enemeled Tank 200 L Solar Enemeled Tank 300 L Date of test report Version 4.5,

2 Page 2 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON Parameters for systems extrapolation (Annex D) Collector of measured system A ref [m 2 ] 1.83 h a 1 [W/Km 2 ] a 2 [W/Km 2 ] IAM (50º) Storage tank of measured system Volume [l] 144 A hx [m 2 ] 0.64 Piping U loop,p 3.20 Name of System Configuration KAIROS THERMO CF-GR 150/1 TR/ TT/ TT DT KAIROS THERMO CF-GR 200/1 TR/ TT/ TT DT KAIROS THERMO CF-GR 300/2 TR/ TT/ TT DT Tested/Extrap ol A c * [m 2 ] u c * [W/Km 2 ] U s [W/K] System parameters C s [MJ/K] S c [-] D L [-] f aux [-] The system configuration 150/1 was used for testing and as basis for scalling. All values are subject to some uncertainty; e.g. the uncertainty on system output is typically in the range of ± 5 % to ± 15 % Version 4.5,

3 Page 3 of 8 Summary of EN test results Certification No S2818 A Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON Street Via A. Merloni 45 public.relations@aristonthermo.com Postal Code Fabriano Tel. / Fax / -40 Kairos CF KAIROS THERMO CF-GR 150/1 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 1 Storage name Solar Enemeled Tank 150 L Calculated annual results for "solar-only / preheat system" Daily drawoff 110 l Daily drawoff 140 l Daily drawoff 170 l Qd,sh Location Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol MJ/y MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % Stockholm SE WürzburgDE Davos CH Athens GR Perf. indicators for the table above Qd,sh MJ/y Not relevant for solar domestic hot water system Qd MJ/y Annual heat demand for domestic hot water QL MJ/y Annual heat energy delivered by the solar system Qpar MJ/y Annual parasitic energy: (electricity for pumps/controllers) f sol =Q L /Q d - Solar fraction Stockholm SE Würzburg DE Davos CH Athens GR G Ref. conditions Ta,ave Tc,ave ± ΔTc G kwh/m² Annual irradiation South, 45 Ta,ave C Annual average outdoor air temperature Tc,ave C Annual average mains cold water temp. ΔTc K Seasonal variation of Tc Th 45 C Desired hot water temperature (mixing valve temperature). Max. operating press. - collector side 150 kpa Max. operating press. - tank side Date of test report kpa All values are subject to some uncertainty; e.g. the uncertainty on system output is typically in the range of ± 5 % to ± 15 % Version 4.5,

4 Page 4 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON KAIROS THERMO CF-GR 200/1 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 1 Storage name Solar Enemeled Tank 200 L Calculated annual results for "solar-only / preheat system" Daily drawoff 170 l Daily drawoff 200 l Daily drawoff 250 l Qd,sh Location Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol MJ/y MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % Stockholm SE WürzburgDE Davos CH Athens GR Perf. indicators for the table above Qd,sh MJ/y Not relevant for solar domestic hot water system Qd MJ/y Annual heat demand for domestic hot water QL MJ/y Annual heat energy delivered by the solar system Qpar MJ/y Annual parasitic energy: (electricity for pumps/controllers) f sol =Q L /Q d - Solar fraction Stockholm SE Würzburg DE Davos CH Athens GR G Ref. conditions Ta,ave Tc,ave ± ΔTc G kwh/m² Annual irradiation South, 45 Ta,ave C Annual average outdoor air temperature Tc,ave C Annual average mains cold water temp. ΔTc K Seasonal variation of Tc Th 45 C Desired hot water temperature (mixing valve temperature). Max. operating press. - collector side 150 kpa Max. operating press. - tank side kpa All values are subject to some uncertainty; e.g. the uncertainty on system output is typically in the range of ± 5 % to ± 15 % Version 4.5,

5 Page 5 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON KAIROS THERMO CF-GR 300/2 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 2 Storage name Solar Enemeled Tank 300 L Calculated annual results for "solar-only / preheat system" Daily drawoff 250 l Daily drawoff 300 l Daily drawoff 400 l Qd,sh Location Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol Qd,hw QL Qpar fsol MJ/y MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % MJ/y MJ/y MJ/y % Stockholm SE WürzburgDE Davos CH Athens GR Perf. indicators for the table above Qd,sh MJ/y Not relevant for solar domestic hot water system Qd MJ/y Annual heat demand for domestic hot water QL MJ/y Annual heat energy delivered by the solar system Qpar MJ/y Annual parasitic energy: (electricity for pumps/controllers) f sol =Q L /Q d - Solar fraction Stockholm SE Würzburg DE Davos CH Athens GR G Ref. conditions Ta,ave Tc,ave ± ΔTc G kwh/m² Annual irradiation South, 45 Ta,ave C Annual average outdoor air temperature Tc,ave C Annual average mains cold water temp. ΔTc K Seasonal variation of Tc Th 45 C Desired hot water temperature (mixing valve temperature). Max. operating press. - collector side 150 kpa Max. operating press. - tank side kpa All values are subject to some uncertainty; e.g. the uncertainty on system output is typically in the range of ± 5 % to ± 15 % Version 4.5,

6 Page 6 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON KAIROS THERMO CF-GR 150/1 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 1 Storage name Load profile M L XL XXL Annual heat demand (kwh) Auxiliary heat contribution Qnonsol Average climate (kwh) Cold climate (kwh) Hot climate (kwh) Qaux (kwh) Comply to the load profile (Yes/No) hwh_nonsol (%) Qelec (kwh) Qfuel (kwh) V40, measured (l) Note 1: Clause of EN :2017 Solar Enemeled Tank 150 L section , see note 1 Strasbourg Helsinki Athens section , see note 1 section , see note 1 section , see note 1 Auxiliary thermostat setting 55 ºC Effective power of auxiliary heater 3.5 kw Version 4.5,

7 Page 7 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON KAIROS THERMO CF-GR 200/1 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 1 Storage name Solar Enemeled Tank 200 L Load profile M L XL XXL Annual heat demand (kwh) Auxiliary heat contribution Qnonsol Average climate (kwh) Cold climate (kwh) Hot climate (kwh) Qaux (kwh) Comply to the load profile (Yes/No) hwh_nonsol (%) Qelec (kwh) Qfuel (kwh) V40, measured (l) Note 1: Clause of EN :2017 section , see note 1 Strasbourg Helsinki Athens section , see note 1 section , see note 1 section , see note 1 Auxiliary thermostat setting 55 ºC Effective power of auxiliary heater 2.0 kw Version 4.5,

8 Page 8 of 8 Ariston Thermo S.p.A. Country Italy Brand (optional) ARISTON KAIROS THERMO CF-GR 300/2 TR/ TT/ TT DT Kairos CF2.0-1 No. Collectors 2 Storage name Solar Enemeled Tank 300 L Load profile M L XL XXL Annual heat demand (kwh) Auxiliary heat contribution Qnonsol Average climate (kwh) Cold climate (kwh) Hot climate (kwh) Qaux (kwh) Comply to the load profile (Yes/No) hwh_nonsol (%) Qelec (kwh) Qfuel (kwh) V40, measured (l) Note 1: Clause of EN :2017 section , see note 1 Strasbourg Helsinki Athens section , see note 1 section , see note 1 section , see note 1 Auxiliary thermostat setting 55 ºC Effective power of auxiliary heater 2.0 kw Version 4.5,