A pool heater can never be too big, but buy a pool heater that isn't big enough and you'll never be satisfied. When selecting your pool heater, always choose a heater rated somewhat higher than your actual pool surface area and desired temperature rise required. There is no such thing as “oversizing” a pool heater.
The larger the output is, the faster your unit can heat water. Generally speaking, it is important to oversize the heat pump as possible. Doing so means warming your pool fast while minimising energy costs.
There is some truth to it, as bigger heaters will heat a pool more quickly, and it can offer a greater temperature differential than a smaller heater would. However, this isn't always the case for every pool setup, and it may not be feasible for some pool owners from a budget standpoint.
Water Temperature Set
Essentially, if you want a greater rise, you will need a larger pool heat pump, as it will increase the water temperature quicker per unit time than a smaller one.
Your heat pump should be correctly sized for your home to provide the comfort you need. Most people assume that an oversized system will regulate indoor temperatures faster and an undersized system will conserve energy, which is not true.
For safety, now this is rare, but having an oversized pump can create excess suction at an unqualified suction port like the main drain, skimmers, side drains, etc. An oversized pump can create enormous suction pressure and can cause people (especially kids) to get “stuck” if they get pulled against it.
For pools under 10,000 gallons, small gas heaters like the Hayward 100K$) BTU output are suitable. Pools up to 15,000 gallons should look at the Pentair 125K BTU or higher, and 20,000 gallon above ground pools should look at the Raypak 150K BTU.
For a typical size 400,000 BTU pool heater, that's 4 therms per hour. Currently, natural gas runs about $1.50 per therm near Tampa. The average cost to heat a pool for one hour on natural gas is around $ 7.00. To heat, an average pool (10-12K Gallon) with no solar cover typically takes 8-14 hours.
Set your pool heater's thermostat to a temperature between 78°F and 82°F (26°C and 28°C) to keep the majority of swimmers comfortable. Maybe a little cooler if you're in an area with very hot summers, or a little warmer if you live in a milder climate.
How long Does it Take to Heat Your Pool. As a general rule of thumb, it can take anywhere from 8-48 hours to increase the temperature of an average size pool (around 15,000-20,000 gallons) by 10-15 degrees Fahrenheit.
Also, turn the temperature down or turn off the heater whenever the pool won't be used for several days. This will save energy and money. It's a myth that it takes more energy to heat a pool back up to a desired temperature than you save by lowering the temperature or turning off the heater.
Every degree you raise the temperatures increases energy costs dramatically; keep water warm, but not spa-warm. Lower the thermostat when the pool isn't being used – If you don't plan to use the pool for a few days, cover it and drop the thermostat to 70 degrees.
If you install a unit that's too small, you won't have enough hot water to meet demand. On the other hand, an oversized unit will cost more to purchase and operate than necessary, negating one of the biggest benefits of tankless water heaters—energy efficiency!
The average life of a pool heater is between 15 and 25 years with regular usage and proper maintenance, but there are various factors that impact that projection.
The cost of propane is roughly $3.00 per gallon, and a 300K BTU propane heater uses 3 gallons of propane each hour to heat a standard 15,000–20,000 gallon pool 2–3ºF per hour. This means an average 300K BTU pool heater will cost anywhere from $6.00 to $8.00 per hour to heat your pool.
How Fast Will a Pool Pump Heater Heat My Pool? It depends on a few things to determine how long it takes a heat pump to heat a pool. However, overall a heat pump generally heats a pool after 24 to 72 hours by 20-degrees Fahrenheit.
How Long To Heat a Pool? An average sized pool (rectangular 16×36) will take 6 hours to heat 10 degrees with a standard heater (300k BTU). The volume of water to heat, how many degrees it needs to increase and the size of your heater all play major factors in the time needed to heat your pool.
A 100,000 BTU heater uses 1 therm of natural gas per hour, so a 400,000 heater consumes 4 therms an hour. 4 therms an hour x $1.67 = $6.68 per hour. So the magic number based on the most common 400,000 BTU pool/ spa heater is $6.68 per hour in gas cost to run your heater.
One of the most cost-effective methods for retaining heat in a swimming pool is installing a solar cover, keeping water up to 10 degrees warmer than with only a heater. The root cause of heat loss in a pool is evaporation. Heat rises, causing warm water to rise off the top of the pool, then evaporating into the air.
It takes a pool 24 to 72 hours to heat up by 20 °F (11 °C) when using a heat pump. You can also use a heater or the sun to warm your pool. However, several factors such as air temperature, swimming pool or spa size, water temperatures, and heat loss can impact heating times.
It's true – when the weather is beautiful outside it's not essential that you need a pool heater, but if you want to keep using your pool all year round then a pool heater is ideal. Of course, in some states this is not possible to keep swimming in the winter because the weather is just too cold.
(Pool capacity in gallons/desired turnover rate in hours)/60=Flow rate in GPM. Example: If you have a 20,000 gallon pool and a desired turnover rate of 5 hours, your desired flow rate would be: (20,000/5) = 4,000 gallons per hour/60 = 66.66 GPM, or approximately 67 GPM.
You use the following formula. Pool gallonage x 2 (the recommended number of cycles in a day) ÷ daily hourly run time ÷ 60 (minutes in an hour). So, for a 30,000-gallon pool that runs continuously (24-hours), the formula is: 30,000 x 2 ÷ 24 ÷ 60 = 41.6 or rounded up it's a 42 GPM minimum flow rate.
Every pool filter has a maximum flow rate, measured in gallons per minute. The maximum flow rate for your pool pump should not be more than the maximum flow rate of your pool's filter. If your pool pump pushes more water through the filter than it can handle, the filter won't work correctly.