What size Btu pool heater will heat a 34500 gallon inground swimming pool?
If you are looking for pool heaters, there are many options. If you specifically want gas or propane, you will want to go with a 400,000 BTU model. Laars/Jandy makes some reliable models. You might also want to consider heat pumps and solar heating. Both are also reliable methods of heating your water that do no require the burning of gas, making operation cheaper.
At a minimum you would need a 400K btu gas heater. This pool is larger than a 20 x 40′ pool or 800 sq. ft. Many things dictate the size or sizing of a pool heater such as the surface area of the pool, the size of the gas line from the meter to the heater, the distance of the run from the meter to the heater, the size or capacity of the gas meter, etc. Proper sizing is a must if your heater is to run at optimum standards.
