News
All our articles in the “Energy renovation” category.

Between rising prices and pressure to cut carbon, your clients want cleaner heat without redoing the whole installation. Renewable gases can meet that expectation, provided you get a good grip on the feedstocks, gas quality and the network and boiler adaptations involved. For you, it is also new ground for advice, simple, concrete, and something you can build into your quotes.
5 min read

On the ground, you see it every day. Every new project nibbles away a bit more space, while existing buildings wait for a second life. By betting on renovation, you meet demand, secure shorter timeframes, and add value to what already exists with concrete solutions: insulation, ventilation, efficient heating. It's also a strong argument with project owners. Less ground footprint, more usability, and a project that's more locally acceptable.
5 min read

The path to 2050 is also decided on your job sites. Between insulation, heating, ventilation and control, you can turn a "standard" renovation into a genuine, measurable gain, without complicating the project for the client. The challenge is choosing the right work packages, in the right order, to durably cut emissions and bills.
5 min read

R290 is propane. It is not a fluorinated greenhouse gas, so it sits outside the quotas in Annex VII of EU Regulation 2024/573, outside the leak checks in its Article 5, and outside the placing-on-the-market bans in its Annex IV. Two trade-offs: safety class A3, whose charge allowed per room comes from the manual and not from a forum, and company certification, which the French order of 21 November 2025 extends to hydrocarbons from 1 January 2027.
6 min read

On the job site, every degree counts. A machine that's more stable in cold weather, more efficient and easier to size means fewer callbacks and more margin for you. Ejector-equipped models open up an interesting path when you're aiming for good winter performance without moving to overly complex solutions. If you equip homes exposed to frost or demanding renovations, this is a technology worth keeping on your radar.
5 min read

When a project demands zero compromise on fire safety and watertightness, you need an insulation material that stays reliable even in humid environments, basements, or flat roofs. This one ticks those boxes without asking you to cut corners on installation, and it holds up well over time. That means secure performance and finishes, plain and simple.
5 min read

Pellets emit carbon monoxide without any combustion, through self-heating and oxidation of the fatty acids in wood. France's ANSES documented a 2026 case at 700-1,000 ppm in a basement and a Swiss fatality at 7,500 ppm. The store has to be sealed off from living space and ventilated.
6 min read

Radon kills 2,500 to 3,000 people a year in France. Dosimeter measurement, slab airtightness, redesigned ventilation and SSD: the technical levers to master during renovation.
6 min read

A microchannel exchanger cuts the internal volume of the condenser, and therefore the refrigerant charge. No quantified gain is published by any primary source, but the regulatory consequence is: below 3 kg, a split system falls under the ban on GWP of 750 or above that has applied since 1 January 2025. Here are the thresholds, the cleaning rules and what to check before specifying one.
5 min read

No text ranks scroll above rotary, and no standardised data compares the two technologies against each other. What can be compared is the seasonal space heating efficiency under EU Regulation 813/2013, the declared sound power level, and the refrigerant charge, which on its own decides your checking obligations. Here is what you record, what you write on the quote, and what carries your liability.
5 min read

On site, the real question isn't the 'best COP' on a spec sheet, but what the machine delivers when demand drops, in mid-season or when just holding temperature. At partial load, a heat pump can gain in efficiency… or collapse if the controls and sizing don't keep up. By mastering these gaps, you protect the quoted consumption figures and your clients' satisfaction.
5 min read

The expansion valve meters the feed to the evaporator and sets the superheat. Replacing or adjusting one means opening the refrigerant circuit, and it is that opening, not the part, that triggers the duties: leak checking based on the charge in tonnes of CO2 equivalent, an intervention record, five years of retention. Here are the adjustment references, the valve types and the interval table.
5 min read
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