BTU Calculator
Answer three simple questions to estimate the right Wasser air conditioning unit for your room.
Find Your Recommended Unit
Select the room type, add the length and width, and tell us whether the room is open-plan.
How the BTU Guide Works
BTU stands for British Thermal Unit. In air conditioning, it describes how much heat an AC system can remove from a room in an hour.
This guide keeps the estimate simple: it uses your room area, the heat level usually associated with that room type, and whether the room opens into another space.
Before You Choose a Unit
- ✓ Room shape and ceiling height can affect cooling.
- ✓ Large windows or strong sun may increase the load.
- ✓ Open doors and connected spaces can change the result.
- ✓ A Wasser survey confirms the best final unit size.
Need Help Choosing the Right AC Unit?
Wasser Group installs and services air conditioning systems across London for homes, landlords, offices, and commercial properties.
View Air Conditioning ServicesBTU Calculator FAQs
Is this BTU result exact?
No. It is a practical estimate. Final sizing should consider glazing, insulation, room layout, roof exposure, equipment, and usage.
Why does kW matter?
Many UK air conditioning units are sold by kW rating, so the calculator shows both BTU and kW to make comparison easier.
Can Wasser install the recommended unit?
Yes. Wasser can survey your space, recommend a suitable system, and install it professionally.