As you know, to increase the temperature of the water in your pool or hot tub, you need a suitable pool heating system. In the following content, you will find the technical specs, heating capacity, and the best price for buying all types of pool heaters.
Pool Heater Review, Selection, and Pricing
A pool heater is one of the most important items in every pool complex. To maintain the health of swimmers and provide comfortable conditions, it is necessary to keep the temperature of the pool and spa water in a suitable range.
Studies show that the ideal temperature for pool water is usually between 27 and 29 degrees Celsius and for spas and hot tubs, between 40 and 43 degrees Celsius based on the conditions and type of use.
In many private pools, an independent pool heating system is used to heat the pool, spa, and hot tub water.
To reduce the evaporation rate of the pool water, the ambient air temperature must be at least 2 to 3 degrees Celsius higher than the pool water temperature. Moreover, to control the pool water temperature, a smart thermostat is used in the output path of the hot water circulation.
Note: An excessive increase in the temperature of the pool water causes an increase in the rate of evaporation and the relative humidity in the indoor pools. Also, this factor will cause erosion and damage to the equipment in the indoor pool area.
Types of Pool Heating Methods
There are two main methods to heat the water of a pool, heaters and boilers. There are several types of boilers and heaters, categorized based on the fuel:
Hot Water Boiler
A pool hot water boiler (cast iron or steel) and heat exchanger (shell and tube or plate heat exchanger) is one of the most common and well-known heating methods for water in large and small pools.
Pool Heater
Pool heaters are among other water heating equipment used in pools and spas, which can also be used for radiators and the supply of hot water. They are usually installed in the engine room and function as an all-in-one heating supply device.
Electric Pool Heater
This type of heater eliminates your need for the central engine room. As the pool water passes through the pipes of the device, the generated heat from the device's elements is transferred to the water, and with only one input and one output, the need for plumbing equipment and engine room pumps will be eliminated.
These heaters are made of cupronickel or steel and have higher thermal efficiency than 80%. The current temperature profile can be seen on the digital screen of the device. CPVC anti-corrosion connections and all-steel heaters are reasons for the high efficiency of the device.
Gas Pool Heater
This type of pool heater, which uses either natural gas or propane, heats the pool's water by pumping it to the heater, where the gas burns in the heater's combustion chamber (the burner), generating heat that then transfers to the water and then it returns to the pool.
Solar Pool Heater
The solar pool heater provides the necessary heat to heat the pool water by converting solar radiant energy into heating energy.
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Pool Heater Heating Capacity Calculation
The method of calculating the heating required to heat the water of the swimming pool and pot tub:
QT = Q1+Q2 Q1 = mCp∆t/t Q2= UA∆t
QT: The amount of required heating capacity.
Q1: The amount of heating energy required to heat the pool water in btu/hr.
m: The mass of water in the pool (m = ρv), where the value of ρ is equal to 8.3 lb. gal and the value of v is equal to the volume of water in the pool in terms of U.S gal.
Cp: Specific heat value of water equal to 1btu/lb.°f T.
∆: The difference between the initial temperature of the water and the desired temperature in degrees Fahrenheit (the value of T∆ in indoor pools is lower than its value in outdoor pools and is calculated according to the employer's opinion - in the range of 40 to 45 degrees Fahrenheit).
t: Desired time to reach the final water temperature value (h).
Q2: The amount of heating energy lost from the surface of the pool water btu/hr.
U: Overall pool surface heat transfer coefficient equal to 10.5 btu/h.
A: Area of the pool bowl.
T∆: The difference between the pool water temperature and the ambient temperature in degrees Fahrenheit.
Tf: The final temperature of the pool water is based on the use and conditions of the pool, usually considered 80 to 86 degrees Fahrenheit. (27 to 30 degrees Celsius).
Ti: The input water temperature of the pool before heating, which is usually considered to be around 41 to 46 degrees Fahrenheit. (5 to 8 degrees Celsius).
Q: The value of boiler power in btu/hr.
For pools that work recreationally (for one day a week, such as pools in gardens and villas), the time required for heating by the pool heater is 24 hours, but in pools that must be watered during the season, From cold conditions to the desired temperature, the pre-start time of the pool heater is considered to be a maximum of 48 hours.
Note: Regarding the mentioned calculation method. If the pool water needs to be heated up for a short period, a more powerful boiler and heat exchanger is required.
Auxiliary unit conversion table:
The rule of thumb for calculating the amount of electrical power consumed by the electric pool heater and the amount of heat capacity produced by them is as follows:
Electric pool heater with 1.5kw power
The amount of heating energy produced btu/h 5120
Electric pool heater with 5.5kw power
The amount of heating energy produced btu/h 18700
Electric pool heater with 11.5kw power
The amount of heating energy produced btu/h 37500
Factors to Consider When Calculating the Heating Capacity of a Pool Heater
When calculating and deciding on the type and capacity of the pool package and the pool heater, consider the following:
The volume of water in the pool bowl
The area of the pool bowl (the amount of water surface that is in contact with the ambient air)
The amount of time required to reach the desired initial temperature (usually considered 24 hours)
The final temperature of the pool water is based on the use and conditions of the pool, which is usually considered to be 80 to 86 degrees Fahrenheit. (27 to 30 degrees Celsius)
The average temperature in the coldest month of the year (to calculate the thermal load of outdoor pools)
The average temperature of the pool hall (to calculate the thermal load of indoor pools)
Note: Cold water entering the pool before heating is usually considered to be around 41-46 degrees Fahrenheit (5 to 8 degrees Celsius).
What is a Heat Exchanger and How it Works
A heat exchanger is the most common requirement for transferring heat from engine room boiler water to the pool or spa. They are produced in two types: One "shell and tube heat exchangers" and two "plate heat exchangers".
The heat exchangers that are used for the pool heater must have high thermal efficiency as well as high corrosion resistance. However, the best and most expensive types are made of steel.
Heat exchangers have two separate pathways: in one line, hot water or hot steam from the boiler or heater flows, while in the other line, the water of the pool flows, which is then heated up by indirect contact with the hot water. Usually, pools and spas use two separate heat exchangers for better efficiency.
How a Heat Exchanger Works Explained in a Video Format:
How to Optimize Energy Usage of a Pool Heater
According to research, nearly 60% to 70% of heat loss in swimming pools occurs from the water surface. Therefore, acquiring some simple methods to limit this heat loss can be very effective in reducing fuel costs.
One of the most effective methods is to use a pool cover when the pool is not in use, which preserves the heat of the water and prevents surface pollution of the water.
Buying Pool Heaters
To buy the right pool and spa heater suitable for your needs, in addition to the dimensions and size of the pool heater (which must fit the desired space properly), the size and type of the pool itself (indoor pool and outdoor pool) must be considered.
On the site of DamaTajhiz HVAC, technical information of dozens of models of pool and spa heaters in various sizes and models from reputed brands such as Hayward, EMAUX, Flexinox, IML, Swaim, Poolstar, Spagold, etc., are provided with their main guarantee so that you can enjoy the good feeling of optimal and smart shopping.
The Price of Pool Heaters
The price of a swimming spa heater varies based on the thermal capacity, material, energy efficiency, the size and type of the pool (indoor pool or outdoor pool), dimensions, etc. You can choose the right one among dozens of models of pool heaters on the DamaTajhiz website.
It should be noted that the price of the pool and spa heaters provided on the website of the DamaTajhiz collection is up-to-date, and the discounts are already included for wholesale purchases. So the best price for the pool and spa heaters is guaranteed.
Dear Users
While thanking you for the trust you have in the technical opinions of temperature equipment sales experts, it should be noted that the buyer ultimately determines the choice of the desired product brand based on history, brand strength, service, and product price.
But in the field of pool supplies, most users and buyers prefer best-selling brands such as Emerald, IML, Hayward, Hyperpool, Aquamarine, etc., due to the quality price, and They choose and buy after-sales services.
If, after reading the above material, you have more questions about deciding to buy different types of pool and spa heaters, diatomaceous, and pool pumps, you can contact the pool equipment sales experts at extension numbers 103 – 105- 106. Get pool and spa heater advice and ask your questions.
Because the specialized group of DamaTajhiz HVAC Group provides all kinds of pool and spa heaters in the Middle East region, if you need a pool and spa heater for any of the countries in the region, you can place your purchase order with confidence, product guarantee, and reasonable price. Please leave it to our sales experts.
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