We can help at every stage of your heat-pump project
HydroFlow can handle the full heat-pump process on your behalf — from building-control applications and grant paperwork through to installation and final commissioning.
- Permits & building control — we prepare and lodge the commune announcement and any permit request.
- Subventions & grants — we assemble and submit your subvention dossier and track it through to approval.
- Full installation management — if you wish, we manage the entire installation and coordinate every trade.
- Commissioning & sign-off — we verify the system is correctly installed and commissioned so your subsidy is released.
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Heat-pump eligibility check
A few questions about your home in Canton Vaud. Takes under 10 minutes. Your answers are saved as you go.
Your preliminary assessment
Indicative guidance only — HydroFlow confirms everything before anything is submitted.
Let HydroFlow manage the whole process
Permits, noise attestations and subvention applications in Canton Vaud involve several authorities, strict sequencing and firm deadlines — and a single missed step can forfeit the grant. HydroFlow can manage the entire process on your behalf: preparing and lodging the commune announcement and any permit request, compiling the noise-compliance attestation, assembling and submitting your subvention dossier to the relevant bodies, tracking each application through to approval, and verifying that the installation is carried out and commissioned correctly so your subsidy is released. You have a single point of contact from first enquiry to final payment — we coordinate everything in between, including authorised third-party electrical partners.
Ask HydroFlow to manage itYour heat-pump investment is currently tax-deductible
In Switzerland, investments in energy saving and environmental protection — including replacing a fossil-fuel boiler with a heat pump, insulation, high-performance windows and solar — are currently fully deductible from your income tax, even where they add value to the property, and the cost can be spread across up to three tax periods. In Canton Vaud a flat-rate maintenance deduction of 20% of the property's value is also available regardless of the building's age. This is changing: on 28 September 2025 Swiss voters approved the abolition of the imputed rental value (valeur locative), and from 1 January 2029 the federal deduction for maintenance and energy-saving renovation works will be removed. That makes 2026, 2027 and 2028 the last tax years in which a heat-pump installation can be deducted at federal level — so there is a clear advantage to planning your project now rather than waiting.
Tax treatment depends on your personal circumstances and your commune of taxation. Confirm your position with your tax advisor or the cantonal tax office before relying on it.
Common pitfalls to avoid
- Starting works — or signing certain supply contracts — before written subvention approval. This almost always forfeits the cantonal grant.
- A missing or incorrect noise-compliance attestation (LwA at 2°C) for air/water or air/air units.
- Pre-2000 buildings lacking the CECB envelope class required for the M-05 air/water grant.
- Assuming the commune announcement is an automatic approval — the commune still decides whether a full permit is required.
- Overlooking that domestic hot water must be covered by the heat pump or another renewable source during the heating season.
- Treating subvention amounts as fixed — figures and conditions are revised periodically; always confirm against the current cantonal rules.
- Expecting Programme Bâtiments funding for solar PV or windows-only works (PV is federal via Pronovo; windows alone are not subsidised).