Choosing the equipment for a modern home is no longer just about selecting a heating system and faucets. Since the implementation of the RE2020, the framework has changed: each piece of equipment is evaluated based on its carbon footprint over its entire lifecycle, from manufacturing to end-of-life. Comparing the available options now requires balancing energy performance, environmental impact, and self-consumption capacity.
Carbon footprint of equipment: what RE2020 has changed
Before RE2020, the choice of equipment for the home primarily relied on its immediate thermal performance. The new regulation requires measuring the carbon footprint over the entire lifecycle of the product: raw material extraction, transportation, installation, daily use, and then dismantling.
This paradigm shift favors solutions that consume little during manufacturing, not just during use. A bio-based insulator like wood fiber or cellulose wadding has a significantly lower carbon footprint than synthetic insulation, even if their raw thermal performances are comparable.
To guide an initial selection, the equipment offered by Idylle Habitat allows you to visualize ranges designed with this low-carbon logic applied to domestic comfort.
| Criterion | Pre-RE2020 Approach | RE2020 Approach |
|---|---|---|
| Main Indicator | Energy consumption (kWh/m²/year) | Lifecycle carbon footprint (kg CO₂ eq) |
| Assessment Scope | Usage phase only | Manufacturing + transportation + usage + end-of-life |
| Preferred Insulators | Mineral wool, polystyrene | Wood fiber, cellulose wadding, hemp, cork |
| Dominant Heating | Condensing gas boiler | Heat pump, solar thermal |
| Renewable Energy | Recommended | Mandatory (at least one source covered) |
Heat pump, solar, thermodynamic: deciding between heating and hot water systems
The heating and hot water production system accounts for the majority of a home’s energy consumption. Three technologies currently dominate modern housing projects.
The air-water heat pump provides both heating and hot water production. It extracts calories from the outside air to deliver them into a hydraulic circuit. Its efficiency drops significantly when the outside temperature falls sharply, making it more suitable for temperate climates.
The thermodynamic water heater operates on the same principle but is limited to producing sanitary hot water. It consumes significantly less than a traditional electric water heater. However, it requires a sufficient volume of air around the unit to function properly, which necessitates placing it in a ventilated room or garage.
Solar thermal (panels capturing heat from radiation) covers a variable share of hot water needs depending on regional sunshine. Coupled with a storage tank, it reduces dependence on the electrical grid. In contrast, photovoltaic solar produces electricity, which can be used to power a heat pump or water heater.
Energy self-consumption: an increasingly important criterion
The clear trend in recent years is towards self-consumption logic. Photovoltaic panels combined with a heat pump and a thermodynamic water heater form a trio that significantly reduces bills and dependence on traditional networks.
This ability to produce and manage one’s own energy has become a true criterion of modernity for a home. It also influences the resale value of the property.
Ventilation and bio-based insulation: two underestimated factors in daily comfort
An efficient heating system loses much of its effectiveness if the building envelope and ventilation do not keep pace. These two factors are often decided last, even though they directly condition the perceived temperature and indoor air quality.
- The double-flow ventilation system recovers heat from the extracted air to preheat the incoming air. It maintains a constant renewal without major thermal loss, distinguishing it from a traditional single-flow ventilation system.
- Bio-based insulators (wood fiber, hemp, sheep wool, cork) provide superior thermal inertia compared to synthetic insulators. Their ability to store and then slowly release heat improves summer comfort, a point that traditional insulators manage less effectively.
- The air tightness of the building, measured during infiltration tests, determines the actual efficiency of the entire insulation-ventilation system. Without it, even high-end equipment underperforms.
Maintenance and lifespan: comparing the real cost of home equipment
The purchase price represents only a fraction of the real cost. Regular maintenance, the lifespan of components, and the replacement of wear parts weigh heavily on the long-term budget.
A heat pump requires mandatory annual maintenance by a certified professional. The filters of a double-flow ventilation system should be changed at least twice a year. A solar thermal panel requires checking the heat transfer fluid and circuit pressure every year.
Neglecting maintenance reduces the lifespan of the installation and degrades its performance well before the theoretical end-of-life of the equipment. A scale protection system on the hot water network also significantly extends the lifespan of the water heater, regardless of its type.
What the total cost reveals over time
When considered over the entire lifespan, a more expensive piece of equipment that is low-maintenance can end up costing less than a budget solution replaced twice. This calculation in total cost, consistent with the lifecycle logic of RE2020, should guide every decision.
The choice of equipment for a modern home revolves around three axes: the overall carbon footprint, the self-consumption capacity, and the cumulative maintenance cost. Cross-referencing these three data points before each decision avoids unpleasant surprises once the installation is in place.