Beyond 250 m², a heat pump is not chosen off the catalogue: it needs the right output, sometimes several machines in cascade, geothermal for very large areas and zone-by-zone control. We size it on your real heat losses to heat the whole villa without over-consuming.
A large home combines heated volume, long pipe runs and several living atmospheres. The answer is not "the biggest heat pump possible", but a heating architecture designed for peak output as well as for the shoulder seasons.
For high heat losses, we install a high-power heat pump or a cascade of several machines managed together. Each one only runs as needed: efficiency preserved in mid-season, full power in severe cold.
On very large areas, geothermal (horizontal loops or vertical boreholes) delivers a stable COP all winter, independent of the outdoor temperature — the best efficiency when demand is high.
Living spaces, night zone, office, outbuildings: we divide the villa into zones with their own setpoints and time schedules, so only what is occupied gets heated.
We integrate domestic hot water production for a large household and, if needed, pool heating, into one coherent installation rather than separate appliances.
Room-by-room heat-loss calculation, emitter flow rates, balancing of the network. On a large home, a sizing error costs thousands of kWh every winter.
Low-loss header, circulators suited to the pipe-run lengths, integration with the underfloor heating and the existing radiators. A clean hydraulic system keeps the output reaching the most distant rooms.
Survey of the floor areas, the room-by-room heat losses and the existing emitters. We identify the zones, the peak output and the right type of heat pump (high-power air-source or geothermal).
Choice between a single high-power heat pump, a cascade or ground-source, division into zones, DHW / pool coupling. Detailed quote with the regional grant already deducted.
Installation of the units, extended hydraulic network, multi-zone integration, DHW tank sized for a large household. Planned and coordinated works.
Setting the heating curve, balancing the zones, checking the cascade, handover. Fine tuning is what makes the difference on a large home.
On a large home, two approaches both stack up depending on the site and the demand. The air-to-water heat-pump cascade installs anywhere and modulates output finely. Ground-source geothermal requires a borehole or loops, but offers the most stable efficiency when the villa demands a lot of heat all winter — and it can be managed just as well in multi-zone mode.
We come and audit the villa, calculate the heat losses room by room and propose the most accurate architecture — grant-deducted quote, with no obligation.
Often yes up to a certain output, with a high-power air-to-water heat pump. Beyond that, or in case of high heat losses, we prefer a cascade of two or more machines: they take turns according to demand, which avoids a big heat pump running permanently at full load and preserves efficiency in mid-season.
The larger the area, the higher and more regular the heat demand: that is exactly where ground-source geothermal shines. Its COP stays stable all winter, independent of the outdoor cold, where an air-to-water heat pump loses efficiency in severe frost. The investment (borehole or loops) is all the more justified when consumption is high.
Through multi-zone management. We divide the home into zones — living spaces, night zone, office, outbuildings — each with its own setpoint and time schedules. We only heat the occupied spaces, which clearly reduces the bill on a large area, without sacrificing comfort where you live.
Yes. We integrate domestic hot water production for a large household and, if you wish, pool heating into one coherent installation. This avoids multiplying appliances and lets you manage the whole thing with a priority logic (heating, DHW, pool).
Because the error is paid for dearly. An oversized heat pump chains short cycles that wear it out and waste energy; undersized, it cannot hold the villa in severe cold. On 250 m² and more, a room-by-room heat-loss calculation and a balanced hydraulic network are worth several thousand kWh per winter. That is the heart of our audit.
5.0/5 · 3verified reviews
« Châssis, panneaux et pompe à chaleur en une seule fois : on a eu un seul devis, un seul planning et zéro paperasse pour les primes. Le résultat est impeccable et notre facture d'énergie a chuté. On ne pensait pas que ce serait aussi simple. »
« Passage du mazout à une pompe à chaleur air-eau. Chantier propre, anciens radiateurs conservés. La maison est mieux chauffée pour bien moins cher. »
« PAC air-air réversible installée avant l'été. Confort été comme hiver, et le SAV répond vite. Très satisfait du suivi. »
Describe your floor area, your emitters and your current heating: we offer you an audit and a sized heating architecture, grant-deducted quote, with no obligation.