Geothermal: stable energy from Swiss subsoil
For ambitious projects: a system that taps the constant heat of the ground via vertical probes. Maximum performance and longevity.
Why choose this solution
COP > 4.5
Ground temperature is constant (10-12°C in Switzerland), far more stable than air. 25% more efficient than air-source HP.
50-year lifespan
Geothermal probes (borehole) have a 50-year lifespan. The HP is replaced every 15-20 years.
Zero noise
Everything is underground. No outdoor unit, no acoustic nuisance. Preferred in dense urban areas.
Passive summer cooling
In summer, we reverse the cycle to cool the building for free via the ground. -3 to -5°C indoors with no active AC.
Who is this for?
- New or heavily renovated homes
- Multi-unit buildings (improved ROI through pooling)
- Buildings in noise-sensitive urban areas
- Plots with space for 1 to 8 vertical probes
Our process
/01
Geological study
Subsoil analysis via cantonal maps, drilling permit, hydrogeological feasibility study.
/02
Probe drilling
Vertical drilling 100-300 m deep depending on power. Typical duration: 3-5 days.
/03
HP installation
Pump installation in technical room (cellar, basement). Hydraulic and electrical connections.
/04
Tests & commissioning
Probe pressure tests, circuit balancing, gradual startup over 2 weeks.
Indicative pricing
from CHF 55'000
From CHF 55,000 all-in (drilling included) for a 200 m² home. Initial premium over air-source HP is recouped in 8-12 years.
FAQ — Geothermal: stable energy from Swiss subsoil
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:
9 900CHF
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.