# Swimming pool heat loss calculator xls

## How fast does a pool lose heat?

Every gallon of water that evaporates from a pool takes with it 6000 BTU’s of heat in the process, and a typical uncovered pool loses 1 to 1½ inches of water a week through evaporation. For a 20 by 40 foot pool, an inch of water amounts to 500 gallons—roughly, a heat loss of more than 30 therms every seven days.

## How do I calculate the BTU of my pool heater?

Use this formula to determine BTU’s required:

1. Surface area x temperature rise x 12 = heater output (BTU)
2. Rectangle: Length x Width.
4. Oval: Length x Width x .25 x 3.14.

## How do you calculate the evaporation loss of a swimming pool?

Wavepools = 1.5+

1. E = Evaporation Rate (Gallons/Day)
2. A = Pool Surface Area (ft2)
3. F = Activity Factor (See Table at Right)
4. P = Water’s Vapor Pressure (mmHG) at Ambient Temperature.
5. Pa = Water’s Vapor Pressure (mmHG) at Dew Point Temperature.

18 мая 2019 г.

## What’s the cheapest way to heat a swimming pool?

Here are the seven cheapest ways to heat your pool this off-season.

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.

## How much does it cost to heat a 30 000 gallon pool?

The average cost is between \$1,500 and \$3,000 depending on the water temperature you set. This is for heating from May 1 through September 30. Unless you live near the equator or love shivering, you need a heater for your pool.8 мая 2015 г.

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## How long does it take to heat a 10000 gallon pool?

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 spa by 20°F (11°C). So now you know some factors that affect your swimming pool’s or spa’s required heating time.

## How much does it cost to heat a pool per month?

Average Costs to Run a Pool HeaterType of HeaterCost per YearCost Per MonthElectric Resistance\$2,100-\$7,200\$175-\$600Gas\$1,400-\$4,800\$200-\$400Heat Pump\$700-\$2,400\$120-\$200Solar\$0-\$120\$0-\$10

## How many BTU do I need to heat my inground pool?

Rules For Sizing Your Heat Pump Pool Heater

Size at 5 BTU’s per gallon or 1.3 to 1.5 BTU’s per litre of water. To heat in normal spring and fall conditions when ambient air temperature average 60°F in a 24 hour period.

## Is a higher BTU furnace better?

A heater with a higher BTU rating is more powerful — that is, it has a higher heat output — than one with a low BTU rating. It can do more to raise the temperature in your room each hour, so you can either heat a room more quickly or heat a larger space.

## How much water loss in a pool is normal?

Normally pools see ¼ – ½ inch loss of water per day due to evaporation. This is roughly 2 – 4 inches per week. For a normal sized pool you will loose 25,000 to 50,000 gallons of water per year due to evaporation.

## How much evaporation in a pool is normal?

A quarter inch per day or less (or 1 inch in the Day 0-4 test) would be considered reasonable evaporation in Central Florida for the dry season (October through May, depending on current rain levels). Losing more than a quarter inch per day in a pool running with no waterfalls, features or heaters is considered a leak.7 мая 2013 г.

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## Why does my pool water evaporate so fast?

Evaporation occurs whenever you expose wind or air to the surface of your pool. … Water molecules rise to the surface, form into a vapor and eventually get released into the air. Heated pools on cool nights experience evaporation more rapidly. This is also why heated pools lose most of their heat overnight.

## Are pool heaters worth it?

Pool heaters have the potential to be an incredibly worthwhile investment if a family wants to utilize its new pool year ’round, or even just well into school starting in the fall. These heaters have state of the art technology that allow for comfortable swimming temperatures, even in sweater weather.