Heater BTUs

[Stephster81]

I am considering getting a gas pool heater. My pool is 20 x 40 and starts at 3.5 ft and goes to 8 ft. After 3:30 PM the pool starts to get shaded. How many BTUs will I need? Based on the calculators online, it looks like 150k. However, it seems low to me. Please let me know your thoughts.

 

[JamesW]

I would suggest 300,000 btu/hr to 400,000 btu/hr.

 

[ps0303]

I would suggest a 400K unit. It's the best bang for your buck.

 

[Geebot]

300K will do it but 400K will do it quicker (and for only a small uptick in cost).

 

[Pauls234]

Another vote for 400K, I love my Raypak, heats my large pool about 2 degrees per hour.

 

[ps0303]

There shouldn't be a big difference in price between a 300K and a 400K unit. Heck my supplier doesn't even have the 300K units in stock. If a customer begs me I have to special order it.

 

[Stephster81]

Thank you everyone!

 

[JamesW]

What did you decide to get?

 

[Esloser]

Hayward makes a 500k one now. Also, depends on your service line and how much it can handle. I know they had to swap out my meter when they installed my 400k BTU heater. They said they could’ve used a 250k if there were issues, but everything would’ve taken longer. 400k heats my spa up to temperature in under 30 minutes.