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

On a job site, you see it right away: a glazed wall can be beautiful, but it can also let cold in during winter and cause overheating in summer. So-called "low-emissivity" treatment offers a simple answer: an almost invisible layer that sends heat back the right way, without changing the light. For you, it's a concrete lever to improve comfort and secure the performance figures you've promised the client.
5 min read

In a retail space, comfort is not up for debate. It is felt, and it shows on the bill. As a tradesperson, you can deliver quick results by treating the heaviest-weighing items first, ventilation, lighting, controls, and by framing the work to limit business downtime.
5 min read

When the roof covering is removed, you have a rare window to gain performance without eating into interior volumes. Continuous external insulation limits thermal bridges, simplifies airtightness and leaves you with a clean roof structure to inspect and repair if needed. It's a demanding method, but done right, it saves you time on finishing and secures the result.
5 min read

Between a small studio and a house with two bathrooms, the right sizing for the tank and generator can quickly shift. The S, M, L and XL draw-off profiles exist precisely to match domestic hot water production to real usage, without overconsuming or risking a cold shower. Mastering them protects your job sites and your quotes, with a simple, recognised method.
5 min read

Between selling all your production and using it on site, the right choice often comes down to 3 simple points: your client's profile, their usage patterns, and the actual value of a kWh depending on the time of day. As a tradesperson, you save time by asking the right questions upfront, then costing two clear scenarios, with no vague promises.
4 min read

In winter, you're looking for simple ways to gain a few degrees without adding to the bill or complicating the job. A well-designed glazed space, built against the facade, can capture the sun, store some thermal mass and take the load off heating when everything is properly set. It's up to you to turn that space into a real asset, with the right choices for orientation, ventilation and shading.
5 min read

On a job site, wood cladding can make a difference at first glance. But for you, the challenge is also to deliver a façade that keeps its promises over time, without moisture traps or rushed details. Between choosing thicknesses, treating singular points, and finishes, there's plenty of room to gain performance while taking care of aesthetics.
5 min read

When a customer complains that the hot water runs out too fast, the problem is often the storage, not the generator. In a vertical tank, heat naturally settles into layers, which helps keep a real reserve of hot water. In a horizontal tank, stratification mixes more easily, and that's where your choice and installation make all the difference.
5 min read

When you size a heating system, a heat-loss calculation makes the difference between a job site that runs smoothly and customer callbacks. With a clear calculation method, you lock in your outputs, flow rates and settings without oversizing "just in case". In the lines that follow, we put the steps back in order, with the points of vigilance that save time on site.
6 min read

In a water heater, the anode does the quiet job that keeps you from getting a callback for a perforated tank. Magnesium, titanium or impressed current, each solution has its own installation habits, checks and pitfalls, and that's often where everything is decided. Get this choice right and you secure the installation's lifespan and your client's peace of mind.
5 min read

On an external wall insulation job, the real headaches rarely start on the large façade surfaces. They happen at window reveals, sills, parapets, and all those small junctions that decide whether the finish is clean or whether rework keeps piling up. By mastering these singular points, you save time, secure the sealing, and deliver a clean result, without last-minute improvisation.
5 min read

When you add a recirculation loop to the domestic hot water (DHW) system, your clients gain comfort, and you gain peace of mind on callbacks. But that continuous circulation can also push up losses in the pipework, especially if insulation and control are rough. Getting the setting right is often just a few hours of fine-tuning to stop kWh leaking into the walls.
5 min read
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