Room Details

m²
Enter the floor area of the room
m
Enter the height from floor to ceiling
Select the insulation quality of your room
How much direct sunlight the room receives
Average number of people regularly in the room
How many windows are in the room (affects heat gain/loss)

Results

Cooling Capacity Required: - BTU/hr
Cooling (Metric): - kW
Heating Capacity Required: - BTU/hr
Heating (Metric): - kW
Recommended System: -

Enter your room details and click Calculate to see results.

BTU Reference Information

Understanding BTU Calculations

A BTU (British Thermal Unit) is the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. In HVAC systems, BTU/hr measures heating and cooling power.

Key Factors in BTU Calculations:

  • Room Size: Larger spaces need more BTUs
  • Insulation Quality: Better insulation reduces BTU needs
  • Windows: Heat loss/gain through windows affects requirements
  • Climate: External temperature affects BTU needs
  • Occupancy: More people generate more heat

Quick Conversion Guide:

  • 1 Ton of cooling = 12,000 BTU/hr
  • 1 kW = 3,412 BTU/hr

Energy Efficiency Tips

Proper insulation can reduce your heating and cooling needs by up to 30%.

Pro Tip: It's better to slightly oversize than undersize your HVAC system, but excessive oversizing can lead to inefficient operation and humidity control issues.