News
Regulation, field practice and tools: our analysis to help renovation professionals sell and deliver energy retrofits.

When a client asks you for a solution that's quiet, reliable, and holds up through winter, the compressor choice often makes the difference. Scroll or rotary isn't just a matter of price. By understanding their strengths and limits, you secure the sizing, acoustic comfort, and lifespan of the installation.
5 min read

On site, you're looking for insulation that holds up without piling on precautions. A bio-based material in granules or panels can simplify installation, especially for interior lining, under screed, or for acoustic correction. The goal is simple: consistent performance, sound moisture management, and a durable result, without the headaches.
5 min read

On a job site, it's not your margin that gets you into trouble, it's the gap between your outgoings and your incoming payments. Between the deposit, progress payments, and retention money, a few weeks of slippage is enough to freeze your purchasing and your schedule. With two or three simple habits, you stay in control of the timelines and secure your jobs without wearing yourself out.
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

In rural areas, when the gas network isn't there, you need to offer a reliable solution that's simple to maintain and acceptable both on the quote and in use. Tank propane often ticks these boxes, with comfortable output and an installation that adapts well to older homes. Here, the challenge is to secure the sizing, the tank's placement and the right settings to avoid overconsumption and callbacks.
6 min read

On a heating installation, a well-chosen, well-set expansion valve can make the difference between a stable machine and an intervention that drags on. As a tradesperson, this saves you time at start-up, fewer callbacks for lack of comfort, and a clearer read on symptoms when things drift. We cover the concrete roles, the main types, and the right on-site reflexes to avoid the pitfalls.
5 min read

In winter, your clients don't judge a renovation by the thickness of the insulation, but by what they feel room by room. As a tradesperson, you can secure the result by relying on a few simple adjustments, even before talking about the work itself, to gain usable heat and limit cold spots. That means a more legible job for the client, and reviews that feel good to read.
5 min read

When you quote a price per hour, it's not just a number. It's the translation of your overheads, your hidden time and the value of your know-how, without burning yourself on a job or underbilling. With a simple method, you secure your margin, justify your quotes without drowning in calculations, and stay in control when a client compares prices.
5 min read

On the ground, a supplementary gas heater can help quickly, without major work, but it doesn't suit every home or every project. For your clients, the challenge is simple: gain comfort right away, without cutting corners on safety, ventilation and the bill. Here's a rundown, with clear benchmarks, to know when this solution makes sense, and when it's better to pass.
5 min read

Between a heat pump and a gas boiler, the difference isn't only in the quote: it's also in the environmental impact over the equipment's entire life cycle. This article works through the DESNZ conversion factors, the SCOP assumptions to use in retrofits, the role of the refrigerant (R32 vs R290), and gives sourced orders of magnitude for your on-site recommendations.
5 min read

Your customers want comfort all year round, with no visible radiators and no room overheating in summer. With a reversible hydraulic system, you can offer gentle warmth in winter and discreet cooling in summer, provided you get the controls and dew-point handling right. Properly sized and installed, it's a solution that adds value to your jobs and limits after-sales callbacks.
5 min read

On a quote or an audit, the same gas can display two calorific values, and the gap is not a minor detail. GCV and NCV change the result, so your billed kWh, your stated efficiencies and your comparisons between solutions. By mastering the conversion ratio, you secure your pricing and avoid endless arguments at the end of a job.
5 min read
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