# What Size Pool Heater Do I Need For A 25000 Gallon Pool?

## How long does it take to heat a 25000 gallon pool?

You will have to calculate your heat loss too. I just took a look at a calculator I built and for an 18×36 25000 gallon pool I ended up with 36-48 hours depending on the various factors. As an aside, I always used about a 250,000 BTU heater on everything, including spas, unless the customer wanted FAST.

## What size pool heater do I need for 20000 gallons?

20,000 gallons x 8.3 lbs / gallon = 166,000 lbs of water that needs to be heated. Since it takes one Btu to heat one pound of water by a single degree, we now know that raising this entire 20,000-gallon pool by one degree will require 166,000 Btu of heat energy.

## How do I know what size heater I need for my pool?

The pool’s surface area divided by three gives you the minimal BTU size recommended for that particular surface area. Continuing the example above with the 15 x 30 pool, after dividing by 3, you get 150. Therefore, the minimum size heater that is recommended for a 15 x 30 pool is 150,000 BTUs.

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## How do you heat a 20000 gallon pool?

In order for 20,000 gallons of pool water to heat 30 degrees you would use the calculation: 20,000 x 8.3 x 30 = 4,980,000 BTU total. This means that it would take 207,500 BTU’s per hour in order to raise this 20,000 gallon pool from 50 degrees up to 80 degrees in a 24 hour period of time.

## How long does it take to heat a pool 10 degrees?

To heat, an average pool (10-12K Gallon) with no solar cover typically takes 8-14 hours. By adding a solar blanket to your pool during heating you will greatly increase the efficiency of the heating process and keep evaporative heat loss to a minimum.

## How quickly does a pool lose heat?

A pool that is uncovered can lose up to 5 degrees F overnight; a good cover can cut that loss by half.

## Can a pool heater be too big?

A pool heater can be undersized: if it cannot replace the heat lost through evaporative cooling, the pool’s temperature will fall below the ideal. However, there is no such thing as oversizing a pool heater. The larger the heater’s output, the faster it heats the water in the pool, and it will not begin short-cycling.

## How can I heat my pool cheaply?

The 5 Most Cost-Effective Cheap Pool Heating Options

1. Solar sun rings. Solar rings are one of the best methods of heating up your pool.
2. Pool heat pump.
3. Eliminate wind from your pool environment.
4. Anti-evaporation devices.
5. Run your pool heat pump during the warmest part of the day.

## How much does a pool heater cost to install?

Pool Heater Pricing On average, to install or replace a pool heater it’s going to cost you between \$1,000 and \$4,000. Installation alone can start at \$500 and run up to \$1,000. The average pool heater costs nearly \$3,000 for the heater and installation.

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## What is the best heater for a pool?

Best pool heaters 2021

1. Pentair 460737 MasterTemp: Best propane pool heater. (Image credit: Pentair )
2. EcoSmart Smart Pool 18: Best electric pool heater.
3. Hayward HeatPro HP21404T: Most economical pool heater.
4. Hayward H-Series H250FDN: Best natural gas pool heater.
5. SmartPool SunHeater S120U: Best solar pool heater.

## How many gallons of propane does it take to heat a pool?

Here’s why: the average propane pool heater burns about 1 gallon of propane per hour per 100,000 Btus. Since a propane pool heater for a standard-sized pool (~21,000 gallons) outputs 400,000 Btus, you will burn about four gallons of propane per hour.

## How can I heat my pool without a heater?

7 Cheap Ways to Heat Your Pool

1. Use a Solar Cover.
2. Invest in Solar Sun Rings.
3. Try Out a Liquid Solar Pool Cover.
4. Build a Windproof Pool Enclosure.
5. Use the Black Hose Trick.
6. Snag a Pool Heat Pump.
7. Combine a Solar Cover and Pool Heat Pump.

## Can you add a heater to an existing inground pool?

Not too difficult to do, most in ground pool solar heaters can be installed in one day. Above ground solar heaters can be installed in less than an hour. Location is most important, so after figuring out if you will install on a roof, fence or deck, the panels can be installed.