Energy rating and air conditioning: what impact on your property's value?

Long focused on heating, buyers' attention is shifting: with the multiplication of heat episodes, summer comfort is becoming a property-selection criterion. And this is felt right down to the value of homes.

Summer comfort, the new appeal criterion

In 2026, roughly one home in two is poorly adapted to intense heat. A property that remains liveable in the middle of a heatwave mechanically gains in appeal. Conversely, a "summer thermal sieve" — overheating in summer — can put buyers off and weigh on the sale price.

Air conditioning and the energy rating: what to understand

The DPE (energy performance certificate) takes into account summer comfort and cooling needs. High-performance, well-sized air conditioning can improve perceived comfort, but be careful: energy-hungry or oversized equipment can increase consumption. The challenge is therefore not just to have air conditioning, but the right air conditioning, well installed.

A reversible air-to-air heat pump, efficient in both heating and cooling, is often a good performance-to-comfort compromise.

The right levers before investing

• Insulation and solar shading: shutters, blinds and overhangs limit heat gains.
• Ventilation: a well-adjusted ventilation system helps remove heat at night.
• Correctly sized air conditioning: neither too much nor too little, with a refrigerant that is durable in the light of the F-Gas regulation.

Selling, renting, living in it: a worthwhile investment

Installing suitable air conditioning is not just a question of immediate comfort: it is also a concrete argument for reselling or renting out a property, in a market where summer heat is weighing more and more heavily.

Are you preparing a sale or looking to improve your home's summer comfort? Ask Proclimo for advice for a truly suitable solution, or discover our support.