Pellet boiler: 100% renewable, fully automatic heating
A credible alternative to a heat pump when your building can't host one: carbon-neutral fuel, efficiency above 92%, fully automatic feed. Windhager, Hargassner and Fröling brands.
Why choose this solution
Efficiency > 92%
Modern condensing pellet boilers (Windhager BioWIN, Hargassner Nano-PK) reach 95% seasonal efficiency, twice that of an old oil boiler.
Carbon-neutral
Wood absorbs during growth the CO₂ released during combustion. Emissions ~25 g CO₂/kWh vs 280 g/kWh for oil.
Cantonal grants
Federal building programme + GE/VD/VS/FR cantonal bonuses: total grant CHF 4,000 to 12,000 depending on power and canton.
Radiator compatible
Like a classic boiler, works without changing the hydraulic system: existing radiators and underfloor heating kept.
Who is this for?
- Homes ineligible for HP (small plot, condo refusing outdoor unit)
- Direct oil/gas boiler replacement with no radiator change
- Buildings with storage room (cellar, annex) for pellet silo
- Rural areas with easy bulk-truck delivery access
Our process
/01
Feasibility study
Boiler placement check, storage room (1.5 to 3 m³ for yearly silo), bulk-truck delivery access, OPair 2018 compliance.
/02
Old system removal
Oil boiler + tank removal (degassing and recycling included) or old gas boiler. Safe material recovery.
/03
Boiler + silo install
Boiler placement, auger or suction connection to silo, outdoor sensor and controller integration. Chimney lining if needed.
/04
Commissioning
First pellet delivery included, heating curve setup, client training (rare and simple: mobile app monitors silo level + maintenance alerts).
Indicative pricing
from CHF 40'000
From CHF 40,000 all-in for a 150-200 m² home (boiler + 2 m³ silo + oil tank removal). Grants to be deducted (CHF 4,000-12,000). Pellet cost: ~9-11 cts/kWh, more stable than oil.
FAQ — Pellet boiler: 100% renewable, fully automatic heating
Tax advantage · 2026-2028 window
100% deductible from your taxable income
Following the September 28, 2025 federal vote, the tax deduction for energy renovations will be removed from January 1, 2029 at the federal level. Use the current window to save up to 30% of the real cost.
Example — 50,000 CHF project
Potential tax saving:
7 200CHF
30% marginal rate
Indicative estimate. Each situation must be validated by a tax advisor.
Ready to start your project?
Free quote, grant support, in-house team.