They also don’t go bad as fast as gas pool heaters do. Overall, a heat pump usually requires between 24 and 72 hours to heat a swimming pool by 20°f (11°c) and between 45 and 60 minutes to heat a. Solar panels on the pergola out back home improvement Installing an lpg pool heater. How long does it take to heat a pool with a propane heater . The installation process is exactly the same for both heater types. Sized correctly, a propane pool heater can take your pool from freezing to balmy in just a few days. So how many hours will the heater run for? Pool heater costs at a glance. The more expensive ones are around $4,000 to $5,000. 20,000 x 8.34= 166,800 lbs. 5000*8.3 = 41,500 lbs of water. As an aside, i always used about a 250,000 btu heater on everything,. The starting price range of a pool heat pump is between $2,000 and $3,000. How long will it take before the pool water reaches 80 degrees f? A gas heater can quickly heat your pool between 1 and 3 deg...