Louis Meneteau

Between an EPC, a quote and the reality of the job site, you're often the one who has to decide quickly, and correctly. A well-built energy simulation helps you prioritise the right measures, estimate the gains and secure your choices before opening up a wall. Here, we're talking about a tool designed to save you time, without drowning you in technical detail.

5 min read

On the ground, limescale shows up fast. Flow rates dropping, heat exchangers scaling up, clients coming back. Between the promises of magnetic devices and the reality of a well-tuned installation, what you really need is facts, clear limits and good habits for advising clients without exposing yourself.

6 min read

On a renovation project, what saves time is a clear, step-by-step pathway, with technical choices that follow one another without ambiguity. As a tradesperson, you need a simple framework to prioritise the envelope, heating, ventilation and grants, without redoing the same calculations three times over. The idea is to move from "we'll see" to a modular plan that adapts to the home and to your way of working.

5 min read

When your clients complain about a shower that's too hot then too cold, it's often the water going down the drain during adjustment that's the real cost. In renovation, you can give them comfort right away and cut wasted litres, without touching the tank. With the right installation and settings, you also secure the temperature — a real plus in family homes.

6 min read

On an EPS external wall insulation job site, carbon impact often comes down to the details. With a simplified approach, you can quickly compare several variants (thicknesses, adhesives, fixings, finishes) and strike the right balance between performance and footprint — enough to answer client requests without spending hours on a spreadsheet.

5 min read

When a client mentions a small wind turbine for their house, you need to sort promise from reality fast. Available height, steady winds, neighbours, local paperwork, that's often where the project is decided, well before the quote. With a few simple benchmarks, you can frame the need, avoid bad surprises, and talk profitability without selling a dream.

5 min read

Altitude is not a comfort nuance, it is a calculation input: France's 3CL-DPE 2021 method publishes its climate data by zone H1a to H3 and by altitude band, below 400 m, 400 to 800 m, above 800 m. The performance thresholds that govern grant eligibility, on the other hand, do not move by a single metre. Here is where the line falls, and what it changes on the quote and on the programme.

5 min read

In housing, cogeneration comes down to a single trade-off: overall efficiency is excellent as long as the unit runs long hours on the base load, and it collapses the moment the unit is sized on the peak. France's order of 20 July 2016 sets the only hard boundary in the subject, a micro-cogeneration unit being one with an installed electrical output of 50 kWe or less. Here are the advantages, the counterparts, and what to check before you price it.

5 min read

Your clients want to reduce their home's impact, but they don't always know where to start. As a tradesperson, you can help them take stock, category by category, then choose the work that really matters: insulation, ventilation, heating. With a simple method and clear orders of magnitude, you save time and back up your recommendations.

5 min read

On a chiller, the heat rejected isn't wasted. Properly harnessed, it can cover a useful share of domestic hot water needs, without adding electrical power, and often with a fast payback on site when usage is regular. For you, as a tradesperson, this is a concrete solution to offer wherever cooling already runs year-round.

5 min read

The diameter of a ventilation duct is not read off the connection spigot on the unit, it is calculated from the flow rate required room by room. One division gives you the cross-section, and the rest of the sizing comes down to lengths, bends and access. What is decided on the layout cannot be recovered at commissioning.

5 min read

When a client wants fast, stable comfort without swings, you have every interest in proposing an emitter that combines a quick temperature rise with sustained gentle heat. On site, it also comes down to very concrete details — controls, thermal mass, noise, and ease of installation — the ones that avoid callbacks. With the right criteria in mind, you can steer clients towards a genuinely premium solution, suited to the room and the household's routine.

6 min read

When a client asks you "how much will it really cover?", you need a simple calculation, not vague talk. By quantifying the share of energy delivered over the year and sizing the right backup, you secure hot water comfort and size the system correctly, without overcost or unrealistic promises. The result is a clearer quote and a job that runs smoothly.

5 min read

On site, you're looking for insulation that performs well, is simple to install, and uses fewer resources. Materials derived from living organisms open up a real avenue, with a manufacturing process that looks more like cultivation than a factory. It gives you a way to offer clients a different kind of insulation — credible, but still with plenty of questions to settle before it goes mainstream.

5 min read

When a client asks you whether their boiler or heat pump "really performs," the right reflex is to look at performance over a full season, not a lab peak. This figure helps you compare generators on a reliable basis, price more accurately, and avoid bad surprises on consumption. In short, a simple benchmark to secure your technical choices and your quotes.

5 min read

In renovation, well-adjusted ventilation often makes the difference between a 'clean' project and a client complaining about odours, condensation and mould. With a solution that automatically modulates flow rates according to humidity, you save time on adjustment and secure air quality without over-ventilating. The result: healthier homes and performance that lasts.

4 min read

When a client wants to cut their hot water bill without complicating their job, solar thermal remains a solid option. As a tradesperson, what you mainly need is a reliable system that's quick to install and easy to explain, with settings that avoid callbacks. Here we get straight to the practical points to help secure your installs and your margins.

6 min read

Between new ecodesign requirements and product data sheets that keep getting stricter, you need clarity to offer compliant heat generators without wasting time on back-and-forth. We sort out what actually changes on the job, from performance thresholds to labelling, to de-risk your quotes and avoid bad surprises at handover.

5 min read

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

A commercial unit falls under two separate obligations, and they are not triggered by the same criterion. The French tertiary decree applies from 1,000 m² of activity floor area, with annual reporting and a 40% reduction target by 2030. The building automation decree ignores floor area and triggers on installed capacity, catching a 300 m² unit with more than 70 kW of plant.

5 min read

On your job sites, rainwater doesn't just disappear. It runs off, accumulates, and can quickly turn a courtyard or driveway into the weak point of the project. By choosing the right surfaces and a management approach that's simple to implement, you limit damage, secure access routes, and deliver an outdoor space that holds up over time.

5 min read

When you have a doubt hiding behind a wall lining or inside a partition, the right move is to look rather than assume. With a quick, clean visual inspection, you can spot compressed insulation, damp, or duct runs without opening everything up. The payoff is a more reliable diagnosis and a better-controlled job, from the very first drill hole.

5 min read

When you insulate from the inside, you quickly gain comfort, but you also risk losing the "buffer" effect of the walls that stabilizes temperature. Good news, the dilemma isn't inevitable. By choosing the right materials, properly handling airtightness, and keeping some mass on the room side, you can aim for a clean, high-performing, comfortable job.

5 min read

In retrofits, walls in rammed earth, adobe or cob call for a different approach. You can gain comfort without trapping moisture or weakening the existing structure, as long as you choose compatible materials and careful installation. Get it right, and you protect the building, the schedule and performance, with no bad surprises on site.

5 min read

A poorly connected intermediate floor is often where heat loss hides and where callback after callback for finishing snags starts to pile up. As the tradesperson, you're the one who can treat this sensitive point cleanly, without adding weight to the job or complicating the networks. With the right moves, you gain client comfort and measurable performance from the very first heating season.

5 min read

On site, the air-ground exchange can improve summer comfort without blowing the budget, provided you don't get the airflow, length and duct installation wrong. As a tradesperson, you have everything to gain by framing the sizing from the quote stage and anticipating the field lessons that make the difference: moisture, cleaning access, slopes, and drainage quality.

6 min read

Between solar production, storage and real-time consumption, your customers expect an installation that adapts without hassle. The right equipment choice makes the difference between smooth self-consumption and unnecessary grid draws, especially as usage patterns change (EV, heat pump, water heater). Here you have concrete benchmarks for managing the flows, securing the job and delivering an installation that keeps its promises.

5 min read

Aiming for a thermal resistance around R=10 changes the scale of comfort and the heating bill. For you as a tradesperson, the real challenge is simple: hit that performance without surprises on thickness, tricky junctions, and moisture. With a clear method from the quote onward, you secure both the result and your margins.

5 min read

No rule sets a minimum distance between an outdoor unit and a boundary line. What binds you are the installation clearances, the noise limit that applies at the assessment position, and whatever the local planning regime adds on top. The rest is site management, and it has to be written down.

4 min read

On a heat-pump water heater, the extracted air often makes the difference between a silent installation and a unit that draws too hard on the room. In renovation, you mainly need to secure three points: where to capture the air, where to discharge it, and how to avoid odours, humidity or cold draughts coming back. With a simple method, you save time on site and deliver stable comfort to the client.

5 min read