Enter both values to calculate btu per hour
Watts (W)
Efficiency (%)
Common:
BTU per Hour (BTU/h)
Result will appear here
Understanding Heating & Cooling Power
BTU and watts measure the same thing - energy transfer rate:
- 1 BTU/h = 0.293071 Watts
- 1 Watt = 3.41214 BTU/h
- 12,000 BTU/h = 1 ton of cooling
For Solar-Powered HVAC
Understanding these relationships helps you:
- Size your solar - Know the wattage of your AC unit
- Calculate runtime - Determine battery requirements
- Compare efficiency - Higher SEER means lower watts per BTU
- Plan for peak loads - AC startup draws extra power
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