'Thermal kettle' homes: what tenants can (or cannot) demand from their landlords in 2025

3 July 2025

Thermal kettle

Thermal kettles: a major summer comfort issue

Thermal boilers : These poorly insulated homes where the indoor temperature often exceeds 30 °C during heatwave peaks. In France, 35 % of the housing stock would be affected, a ratio even more pronounced in the mansard roofs of our Alpine resorts.


Tenant rights: rent payment and energy decency

  • No rent suspension : even if the dwelling is uninhabitable, the tenant must continue to pay, unless a court decides otherwise.
  • Possible remedies : formal notice, referral to the litigation judge to challenge decency.
  • Decency 2025 : for now, overheating is not part of the legal criterion, but the DPE reform should incorporate "summer comfort" by 2030.

Need to value your property? Althenor offers a personalised advice and qualitative valuations.
→ Free valuation


Landlord owner: current obligations and future "Zero Boiler Housing" law

2025 situationPlanned change
Air conditioning : no obligationShutters + ceiling fans can be required by the tenant if the bill is passed
Major works : unrestrictedIncorporation of summer comfort into the notion of decency → obligation to bring up to standard before 2030
Rent freeze F/GPossible extension to properties rated "boilers"


Energy renovation: enhance your asset and reduce vacancy

  • Green premium : a property upgraded from class G to C gains up to 11% in value in the Arve valley.
  • 2025 grants : combined MaPrimeRénov' + PTZ loan for overall performance.
  • Window of opportunity : average negotiation of 9% on properties to renovate, ideal for a heritage purchase.

Althenor mobilises its network of craftsmen to cost your works and secure your budget out of season.
→ Our properties for sale


Conclusion

The status of thermal boilers is undergoing major change: while tenants cannot yet demand air conditioning, they already have levers to assert the decency of the dwelling and, soon, to demand heat-proofing measures. For the landlord owner, anticipating standards means preserving your yield and the value of your property. With Althenor'slocal expertise , turn this constraint into a lasting heritage opportunity.

All articles