Estimate gas heater output and input from pool area and how much warmer than the air you want it.
How it works
Surface area times temperature rise times 12 gives output in BTU per hour. Multiplying by 15 gives gas input at typical efficiency.
Before you order
- A pool cover cuts heating cost sharply.
- Windy sites need a size up.
- Have gas supply and venting checked against the heater manual.
Common questions
Is a bigger heater better?
A larger unit heats faster and may run less often, but costs more up front and needs a gas line that can supply it.
Heat pump or gas?
Heat pumps work best in mild weather and cost less to run. Gas heats fast in any weather.