Floor cooling: how cool mode works
Hydronic underfloor heating can operate in cool mode in summer. Instead of sending warm water (28–40 °C) for heating, the aerothermal heat pump sends cool water (16–20 °C) through the floor circuits. The surface cools slightly, generating a very pleasant and healthy thermal comfort.
Advantages of cool floor over air-conditioning splits
| Feature | Cool floor | Air split (cooling) |
|---|---|---|
| Cooling intensity | Gentle (3–5 °C) | Intense (up to 8–15 °C possible) |
| Cold air draughts | No | Yes |
| Indoor noise | None | Audible fan |
| Airborne dust | No air movement | Recirculates air and dust |
| Electricity consumption | Low (cooling COP 4.0–5.0) | Medium-High (cooling COP 3.0–4.0) |
Official Installers in Alt Empordà
Dew point control: the critical point
The main risk of cool floor is condensation. To avoid it:
- The heat pump (Daikin, Panasonic, Vaillant, De Dietrich) incorporates a dew point sensor.
- A controlled ventilation system (MVHR) is recommended to reduce indoor humidity.
- The system stops automatically if there is a risk of condensation.
Frequently asked questions
Is cool floor enough for Alt Empordà summers?
For most summer days (24–30 °C), yes: cool floor keeps the interior at 22–24 °C. For exceptional days above 35 °C, it is recommended to complement with fan coils in the main rooms.