== == Well, you can run a 10/3, if that's what the unit calls for. If the pool heater equipment/motor only call for a 30 amp feeder you're away. I think this would be a bit light myself. You would have to tell me what the pool equipment manual is calling for before I can tell you what to run. If you get stuck, as always, consult a qualified electrician. <><><> It depends on the current load of the pump and the length of the run. Check Google. I found some handy calculators when wiring my outbuildings. (And for reference, we ran 40A service 200ft out to a barn through aluminum [It's underground wiring, and I used special aluminum connectors]- 2 ga wire was the best fit.)
As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
You should first make sure yuor pool is compatible with a heater. You will also want to make sure you get the proper BTU for your pool size.
form_title= Pool Heater form_header= Stay warm and swim with a pool heater! What is your budget for a pool heater?*= _  What type of pool do you have?*= () Salt Water () Chlorine What is the size of your pool?*= _ 
You must look for how big your pool is to make sure you buy only what you need and make sure the heater has a warranty.
Heaters are usually plumbed in after the filter. The pool filter/pump is what circulates the heated water. Ans: The heater will not work or fire if the pump is not running.
Until the desired temp is reached, or you want to maintain the desired temp, a pool heater is going to run and consume gas.
What i s the best pool heater
The heater will not operate if the pump is not on.
directions for closing above ground pool with heater
I always left the solar cover on the pool except when I was swimming in it. The solar cover provided enough heat so I did not need to turn on my heater. If the heater pushes the solar cover aside, remove the solar cover from that part of the pool.
You need to check your gas lines for the size of piping under ground. The size of the heater is all personal preference really, but its up to how much gas flow you can get which will tell you if you can get the bigger, better heaters.
Most comfortable is 85 degrees F.
Do you mean a pool that has a salt water generator? If so, any pool heater could be used.
locate pool in sunny area, use a solar water heater, solar pool cover, pool heater or enclosed sun room
it depends if you have a pool heater
no you need a stronger heater specifically designed for a swimming pool
Start with a "maxtemp pool heater" search.
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.
You can buy a swimming pool heater in the Burlington, Vermont are at Leslie's Pool Supplies. They have a great selection.
Recommend 400,000 BTU heater
The swimming pool heater service usually takes about 1 to 2 hours. This of course can change if you have a larger heater.
My heater to heat my 18 X 40 pool (30,000) gallons takes one hour per degree. I have a 250,000 btu heater.