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Air-to-water heat pump: customer feedback after replacing a gas heating system

In Saint-Genis-Laval, Francce, Warmeo recently carried out a project involving the replacement of a gas heating system with an air-to-water heat pump. This installation clearly demonstrates the potential benefits, with savings observed within the first few months.

Pompe à chaleur Warmeo

« Today, we are already seeing a significant drop in our energy consumption since the system was put into operation. »

Jean-Pierre Pluchot

Infos clefs

Project type

Energy optimization

Installer

CROZAT – Experts in thermal comfort

Installed solution

  • WAO: our air-to-water heat pump
  • TRLB: a dual-function unit for heating and domestic hot water

Installation and commissioning

January 2026

Context & needs

The objective was clear: to optimize the home’s energy consumption while simplifying the heating system. Previously powered by gas, the property is equipped with underfloor heating and radiators.

Already fitted with self-consumption solar panels, the installation provided an ideal opportunity to rethink the heating system and make better use of this energy production.

The choice therefore focused on a more efficient solution, making it possible to reduce dependence on gas while keeping energy costs under control.

Solution adopted

The chosen solution was our WAO monobloc inverter, a high-performance air-to-water heat pump capable of operating down to -25°C and producing water up to 70°C.

In practical terms, this system captures heat energy from the outdoor air to heat the home, while significantly reducing energy consumption.

Easy to install thanks to its integrated components and using a natural refrigerant (R290), it has completely replaced the gas system with a more efficient and sustainable solution.

In addition, a TRLB 250 unit was also installed. This dual-service unit optimizes the balance between heating and domestic hot water production, ensuring smoother operation and improved overall system performance.

What are the daily benefits?

Reduction in energy costs

Consistent thermal comfort all year round

Sustainable and easy-to-use solution

Better utilization of solar energy

An experienced local installer

The installation was carried out by Crozat, a company specializing in heating systems and a trusted partner. Their expertise ensured a solution tailored to the home and an installation carried out under optimal conditions.

Installation in pictures

Customer testimonial

What were you expecting from this change?

« The goal was to eliminate one source of energy and optimize our energy consumption, particularly through our solar panels. So far, we’ve already saved about €1,500 in just three months. »

How was the follow-up after the installation?

« Great. There is genuine remote technical support: the Warmeo teams were able to anticipate a technical issue and respond quickly, without disrupting service. »

Are you satisfied with your heat pump?

« Yes, it works perfectly. Since it was first set up, everything has been stable and efficient, and it’s reassuring to know that we have such a responsive and dedicated customer service team behind us. »

Would you recommend Warmeo?

« Sure, no problem at all. Changing systems can feel like a big decision at first, but today I can clearly see the benefits. »

Outcomes

Noticeable energy savings

in just 3 months

Optimized energy consumption

on a daily basis

Comfort and efficiency

all year round

A successful project from the outset

The system is now delivering tangible savings while providing consistent comfort on a daily basis. This type of solution is part of a sustainable energy optimization strategy suitable for many homes.

Got a similar project? Our teams will support you in the study and implementation of your solution.

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Accessoires

All the accessories for Warmeo heating solutions
All the accessories for Warmeo heating solutions

wao

Elegance and performance
Uses environmentally-friendly R290 gas, and offers easy installation and quiet operation.

WHL

Easy installation and performance
Easy to install with integrated circulator and heaters, and operates silently. Reliable and durable.

WTH

Thermodynamic hot water tank
Easy installation for peace of mind

aeropool

Swimming pool heat pump
Performance and discretion

rlb100

The intelligent indoor unit
Made in France

THE APP

Designed by and for heating professionals

REcherche