Response to Hi, I live in Napa California. Solar no longer does the job of heating the pool because of our cedar trees have grown so much that they cover the roof where the panels are. It's time for a gas fired heater. Here are my questions: 1. I believe the pool holds about 22,000 gallons. It is "L-Shaped" about 36' at the longest and about 16"across at the long narrow. What size (in BTUs) will it take to heat it up? The more BTUs, the faster it will heat up?

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