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

3 July 2025

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

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