Heat pump boiler
Heat pump water heaters for domestic hot water preparation are eligible for funding.
- Lump-sum contribution: CHF 750.– per unit
- A maximum of one heat pump water heater per residential unit is eligible for funding.
Funding application
The funding application and the power of attorney must always be submitted in full and on paper, including all enclosures. Submissions by e-mail are not sufficient. The content of applications will only be processed once the application documents have been received in full.
Förderantrag Wärmepumpen-Boiler (PDF), 01.02.2026
- Pauschal 750.-CHF/ Stk.
- Je Wohneinheit wird höchstens ein Wärmepumpenboiler gefördert
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Only new, state-of-the-art systems and system components and appliances are to be used.
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Domestic hot water preparation must primarily be provided by the funded building services system, thermal solar collectors or a heat pump water heater. Pure electric water heaters are not permitted for funded installations.
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Electrically operated pipe trace heating systems and hot water circulation systems must be connected with a timer, ideally via an all-pole disconnection point (socket). This is because pipe trace heating systems are large consumers of electricity and should be operated in a targeted manner. If there is a disconnection point (socket), consumption can be measured and simply unplugged if unnecessary operation/service is required.
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Circulation pumps of energy efficiency class A (EEI ≤ 0.23) must be installed for hot water circulation. If a circulation pump is installed that does not comply with energy efficiency class A (EEI ≤ 0.23), the subsidy will be reduced by CHF 300 per pump.
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Heat pump boilers with a COP of at least 3.2 according to EN 16147 with test condition A20/W10-55 must be installed.
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The heating and hot water systems, including all distribution pipes, must be fitted with continuous thermal insulation. The minimum insulation thicknesses can be found in the following table:
|
Nominal pipe diameter DN |
Inch |
for λ > 0.03 W/mK |
for λ ≤ 0.03 W/mK |
|---|---|---|---|
| 10-15 | 3⁄8" - 1⁄2" | 40 mm | 30 mm |
| 20-32 | 3⁄4" - 1 1⁄4" | 50 mm | 40 mm |
| 40-50 | 1 1⁄2" - 2" | 60 mm | 50 mm |
| 65-80 | 2 1⁄2" - 3" | 80 mm | 60 mm |
| 100-150 | 4" - 6" | 100 mm | 80 mm |
| 175-200 | 7" - 8" | 120 mm | 80 mm |
Start of Construction – Forfeiture of Entitlement The entitlement to receive funding grants lapses if the measures are commenced before a legally binding approval of the funding has been issued.
Project Author / Planner Funding grants are only paid out if competent planning and professional implementation of the measures are ensured.
Time Limit In accordance with Art. 25 of the Energy Act (EEG), the funding approval is subject to a time limit. The measure must be started within one year of the decision on the granting of funding and completed within two years.
Mandatory Other Provisions The measure is not subsidized if it is mandatory due to other legal regulations in accordance with Art. 4. para. 2a) EEG (e.g. development plan, air conditioning, swimming pool heating, conversion, etc.).
Repeat Funding Funding grants are awarded only once per measure; repeat funding of the same measure is only possible after a period of 20 years has elapsed.
For the assessment of any potential funding after 20 years, the original funding approval date is decisive.
Installation location
When installing heat pump water heaters, the following aspects must be carefully considered or clarified in advance by a qualified specialist with regard to possible impacts:
Noise level: Special attention must be paid to the noise level, particularly if the installation room is located close to bedrooms or living areas.
Room cooling: Due to heat extraction, the installation room will be cooled. The room should therefore have a minimum volume of 20 m³.
Heat extraction: Heat is extracted directly from the installation room and indirectly via walls and ceilings if the installation room is located within the thermal envelope of the building.
Installing the unit in unheated but insulated rooms reduces heat extraction and thus the indirect consumption of heating energy during the winter season.
In summer, this heat extraction is perceived as a cooling effect.