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The Best Spa Heater of 2023 – Reviewed and Top Rated

After hours researching and comparing all models on the market, we find out the Best Spa Heater of 2023. Check our ranking below.

2,825 Reviews Scanned

SaleRank No. #1
UCEDER Hot Tub LX H20-Rs1 Thermostat 110V 2kw with Adjustable Temperature Thermostat for Some hot tubs,Underground Small Pool &Bathtub(Suggest Connect 20A Adapter or Breaker
  • Requires a 20A circuit(Connect 20A adapter or breaker),with 1.5" outlet , min 0.35MPA pressure,suggest work with at least 0.25HP,suitable small bathtub & spa tub /hot tub 2 KW /110V-120V.No plug, just 3 cables,Black Cable is Live,White Cable is Neutral,Green Cable is Grounded.
  • Pls put hot water instead of cold water in the hot tub,we suggest water capacity not more than 400 US gallon,in addition,you need an insulation cover to maintain the temperature,or it will take long time even will not be able to catch up.
  • Adjustable thermostat from 0 - 45 ℃, when the water temperature reaches the set temperature,it will stop automatically. when temperature is dropped down, it will heat up water until your set temperature.
  • Thermostat case is engineering plastic, heating element using UL approval metal pipe electric-heating element, Incoloy800 against high temperature and against causticity dedicated stainless steel pipe.
  • Wrong installation direction will not work,pls ensure that the water flow is in the same direction as the arrow direction on the heater,we suggest need authorize person to install the heater.
Rank No. #2
Mxmoonant Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired)
  • [Self-Heating]: When the water temperature reaches the preset temperature, the pool heater will automatically stop. And when the temperature is lower than the preset temperature, the heater will automatically turn on again.
  • [Dry Burning Prevention]: The swimming pool heater is equipped with a pressure switch to protect it from the risk of dry burning due to lack of water in the operating process. If the water pressure drops to 15kPa or less during operation, the pressure switch will shut off the power.
  • [High Temperature Protection]: The hot tub heater has a high temperature protection switch. When the temperature reaches 50°C due to a lack of water flow or a blockage in the inlet, the heater will trip (cut off power).
  • [Wiring Method]: Pool heater typically do not come with a standard plug attached because it often requires higher voltage and current levels compared to standard household appliances. Instead, they are designed to be hardwired or connected using specialized connectors. High power heater can achieve better heating effect, so we recommend that you invite an electrician to help you wiring.
  • [Notice]: The pool thermostat is suitable for pools around 500 gallons. In addition, the electric pool heaters come with 2 different pvc pipe connectors. One inner diameter is 48mm (1.88"), and the other is 50mm (2"); [Tips] It is recommended to use SCH 40 1.5inch pvc pipe.
Rank No. #3
Ecosmart Smart 11 Electric Spa Heater, White, 12 x 10.5 x 4.75
  • Reliable, efficient, convenient, on demand heating.Voltage: 220.0volts
  • Can replace your existing spa heater
  • Save energy, save space, save water
  • Digital thermostat control
  • Activation flow 10gpm
Rank No. #4
Etotel Hot tub Heater H20-RS1, Fit for Some Hot Tubs,Bathtub,AboveGround Underground Small Pool & Electric Pool, Spa Hot Tub Heater 220V 2KW with Adjustable Temperature Thermostat black
  • 【Application Range】The hot tub heater is used in hot tub, bath and small pools with temperature cover 220V-240V/2KW(2.6HP).We recommend that the water capacity does not exceed 200 US gallons.We suggest at least 0.25HP / 170W pump, then can insure it works correctly.
  • 【High-quality Materials】This hot tub thermostat casing is engineering plastic, heating element using UL approval metal pipe electric-heating element,Incoloy800 steel Thermostat element very safety,Against high temperature and against causticity,Long service life.
  • 【Easy to Install】Make sure the mount direction is correct, there is a arrow direction shows the water inlet and outlet marked on the heater,Connect the water pipes on both sides of the water inlet and outlet, respectively.
  • 【Caution】The hot tub thermostat can keep the water at a preset temperature of 113℉/45℃. The preset temperature can be at 32℉/0℃ ~ 113℉/45℃ according to the customer's requirements.When the temperature exceeds 113℉/45℃,The heater stops working.The heater the important thing need to make sure enough water flow,suggest the pump not less than 200 W (3600 L/ h).
  • 【After-Sales Service】Please put hot water instead of cold water in the hot tub. Best used indoors to avoid the natural elements. If have any issues, please contact us by your account,we will help you within 24 hour.
Rank No. #5
Smart Spa Supply 5.5kw 240v Incoloy Flo-Thru Universal Heater Element Replacement Hot Tub Heating
  • 5.5kw 240V
  • Standard Incoloy - 1 Year Limited Warranty
  • Universal Flo-Thru Spa Hot Tub Heater Replacement, Good Corrosion Resistance
  • Includes Hardware Kit - 2x Terminal Nuts 2x O-Rings 2x Jam Nuts
SaleRank No. #6
HydroQuip 5.5KW, 240 Volt Flo-Thru Universal Heating Element with Mounting Hardware for Swimming Pools or Spas Electric Heaters
  • The Hydroquip 5.5kW 240 Volt Flo-Thru Universal Heating Element is an excellent addition to any swimming pool or spa electric heater. With a powerful 5.5kW output, this heating element is designed to quickly heat up your pool or spa, allowing you to enjoy warm water even during colder months. The heating element is made from high-quality materials, ensuring it can withstand the elements and provide reliable performance for years to come.
  • One of the main advantages of the Hydroquip 5.5kW heating element is its universal design. This heating element can be used with a wide range of swimming pool and spa electric heaters, making it a versatile choice for homeowners and pool professionals alike. Additionally, the heating element comes with mounting hardware, making it easy to install and ensuring a secure fit.
  • The Hydroquip 5.5kW heating element is also designed for efficient performance. The flo-thru design allows water to pass through the heating element quickly, reducing the amount of time it takes to heat up your pool or spa. The 240-volt power supply provides plenty of power to the heating element, ensuring fast and efficient heating.
  • Safety is always a top priority when it comes to swimming pool and spa equipment, and the Hydroquip 5.5kW heating element is no exception. The heating element is designed with safety features to prevent overheating and ensure that it operates safely and reliably. This includes a high-limit thermostat that automatically shuts off the heating element if the temperature exceeds a certain threshold.
  • The Hydroquip 5.5kW 240 Volt Flo-Thru Universal Heating Element kit is an excellent choice for anyone looking to heat up their swimming pool or spa quickly and efficiently. Its universal design, mounting hardware, and safety features make it a reliable and versatile choice for homeowners and pool professionals alike.
Rank No. #7
ExGizmo 11KW 220V Electric Water Heater Thermostat Swimming Pool Heater SPA Hot Tub for Above Ground Inground Pool Hot Tub Heater Pump with Digital Display Touch Screen Control
  • Superior Thermostat: Power: 11KW; Input Voltage: AC 220V; 50/60HZ; Current: 50A; With Self-Checking Function: This would keep the security during operation. If the machine is in the absence of water, the LCD will display a code.Easy to Install: It needn’t spend too much time on installation. It is recommended that you connect the water heater with a pump of at least 1.5HP (1.1KW) power to connect the heater and the pool. Please notice the order of setup.
  • With Adjustable Temperature and LCD Display: The electric SPA heater will automatically control the temperature ranged from 71.6 °F-122 °F (22 °C-50 °C).With the clear LCD and indicators, the working status of the pool heater could be displayed. Through the humanized touching screen, It is convenient to observe the change of temperature on the LCD at any time, and you can adjust the setting value easily through the touching screen.
  • Intelligent Self-test and Automatic Modulation: can detect automatically to reach the set temperature but also supervises the operational status of the heater in case of water absence. This premium pool heater has an intelligent temperature sensor. It always maintains the temperature with the setting value as you need. When the water temperature drops, the thermostat will turn on the heating.
  • Application: It can be applied to multiple scenes in indoors and outdoors, such as swimming pools, SPA pools, and bathtubs.It can be used for a long time for adopting high-quality materials. The sensitive temperature sensor and the self-checking system make the heater machine much intelligent without temperature fluctuation. With this digital pool heater, you will enjoy a comfortable bath during your leisure time.
  • High-Quality Material: The inner tank of this electric swimming pool heater is made of stainless steel, durable and sturdy performance and the water quality is cleaner. Aluminum-plating zinc plate shell is sturdy and not easy to wear. This swimming pool thermostat adopts advanced aluminum-plating zinc plates, effectively avoiding the hurt of exposure to the sun.
Rank No. #8
Smart Spa Supply 5.5kw 240v Titanium Flo-Thru Universal Heater Element Replacement Hot Tub Heating
  • 5.5kw 240V
  • Long Life Titanium - 2 Year Limited Warranty
  • Universal Flo-Thru Spa Hot Tub Heater Element
  • Includes Hardware Kit - 2x Terminal Nuts 2x O-Rings 2x Jam Nuts
SaleRank No. #9
GOORIDA 220V 240V/3KW Spa Hot Tub Thermostat, Inflatable Pool Thermostat with Adjustable Temperature Fits for Bathtub, Above Ground Pools, Water Thermostat Replacement Parts
  • Item No. H30-RS1, comes with 1-PC 220-240V/50-60Hz, 3000W, hot tub thermostat, 2-PCS tube connectors (The tube is not included, you need to prepare an extra 1.5” hoses), suitable for a bathub with 340 gallons, up to 600 gallons.
  • Make sure the direction of the water flow is correct, otherwise it will not work. Minimum working pressure 0.035MPa. we recommended to use at least 0.25HP/200W (1500GPH) pump to work well. The required heating time varies according to the environment and water temperature, so it is recommended to fill the bathtub with hot water instead of cold water to reduce the heating time(better with an insulation cover).
  • By adjusting the temperature button, the thermostat can keep the water temperature between 0℃ and 45℃ (32ºF~113ºF), this thermostat turns on and off automatically according to the temperature you set. If temperature exceed 60℃(139ºF), reset button will flick out and cut off the power, needing manual reset.
  • Reminder: Make sure you have 220-240 volts before purchasing this product.
  • Very cost effective solution:If you want an easy and affordable thermostat for your Jacuzzi tub or even if you want to make your own. As long as you follow instructions this is a 1-hour maximum install.
SaleRank No. #10
Ecosmart 5.5 Smart Electric Spa Heater, White, 12 x 10.5 x 4.75
  • Reliable, efficient, convenient, on demand heating
  • Can replace your existing spa heater
  • Save energy, save space, save water
  • Digital thermostat control
  • Activation flow 10gpm
SaleRank No. #11
VEVOR 9KW 240V Digital Water Electric SPA Heater, White
  • Superior Heater: Power: 9KW, Input Voltage: AC 240V 50/60HZ; Current: 37.5A; Product Size(L × W × H): 17.7 × 4.1 × 13.9 inch (450 × 105 × 355 mm). This swimming pool heater adopts advanced aluminum-plating zinc plates, effectively avoiding the hurt of exposure to the sun. The liner tank uses 304 stainless steel to feature durable and sturdy performance.
  • Adjustable Temperature: It is convenient for you to observe the change of temperature on the LCD at any time, and you can adjust the setting value easily through the touching screen. The electric SPA heater will automatically control the temperature ranged from 71.6 °F-122 °F (22 °C-50 °C). With the smart temperature sensor, the heating system is always under control and keeps non-fluctuation of the temperature.
  • Intelligent Self-test: The intelligent self-checking function not only can detect automatically to reach the set temperature but also supervises the operational status of the heater in case of water absence. If the heater has the risk of high temperature, the heating system will stop working. This humanized design helps to keep you secure when you use the machine.
  • Ease To Assemble: The pool thermostat is not complicated to install. We provide you a detailed installation manual and 2 of 1.96inch (50mm) interfaces. Please distinguish the inlet pipe and the outlet pipe during your installation. It is recommended that you connect the water heater with a pump of at least 1.5HP (1.1KW) power.The diameter of the water pipe you use should be 1.5in(38mm) for a smooth flowing.
  • Wide Application: This high-quality electric pool water heater is commonly used indoors and outdoors, especially for swimming pools, SPA pools, and bathtubs. The digital heating system maintains a constant and comfortable temperature. For a better heating effect, you are suggested to use this water heater for a maximum of 1585 Gallon (6 CBM) pool equipment.
Rank No. #12
Happybuy Electric Water Heater fit for Thermostat 3KW 220V Electric Water Heater fit for Thermostat for Max 528 Gallon Mini Swimming Pool SPA Swimming Pool fit for Thermostat Automated 50mm Interface
  • Smart Thermostat: The thermostat comes with a temperature probe, which can sensitively sense the temperature of the pool water. The heating can automatically adjust to the set value of the thermostat. Adjustable temperature range of 20℃-40℃(68℉-104℉), time can be set by yourself.Note: The diameter of the water pipe you use should be 1.5 in(38 mm) for a smooth flowing.
  • Secure & Reliable: If the temperature of the water or thermostat housing exceeds 60°C (140°F), the high-temperature protection device will immediately trip. Once the flow is small or not enough water pressure, the thermostat will switch off the power automatically, prevents the thermostat from being damaged by dry burning. Material: Metal;Voltage: 220-240V/50-60Hz;Power: 3KW;Current: 14A;Phase Parameters: Single Phase.
  • Durable Material: The inner tank of the thermostat is stainless steel, and it has a long service life without rust. Internal use of international cables, in line with international standards, without having to worry about product quality problems during use. Note:Do not use the thermostat in saltwater, acid water, or alkaline water.
  • Simple Operation: The internal circulation of the water heater is smooth, with no scum. It is easy to disassemble. After the correct installation, the user rotates the control switch to set the temperature and the heating indicator lights. The water will automatically heat up to the level set by the user and maintain the temperature.Note:Do not install the thermostat outlet of the bathtub in the middle of pipes or valves or check valves.
  • Multiple Usages: Water heater operation is fully automatic and easy to use.Need to be equipped with a circulating water pump about 550W, and the water pressure is higher than 20kpa. It is suitable for heating constant temperature systems such as small hot springs, mini swimming pools, and bathtubs.Capacity:No more than 1.5CBM(396 gallon);Suitable For: Max 2CBM(528 gallon) Hot Tub & Swimming Pool Equipment. Note:Do not place any electrical appliances within 1.5 meters of the thermostat.
Rank No. #13
VEVOR Electric Pool Heater 11KW 240V Swimming Pool Electric Heater Water Bath Heater Electric Digital fit for Thermostat, fit for Max 1981 Gallon Pool Equipment,Note:You Must Wire This Item Yourself
  • Superior Heater: Power: 11KW, Input Voltage: AC 240V 50/60HZ; Current: 50A; Product Size(L × W × H): 18.7 × 3.9 × 14 inch (475 × 100 × 355 mm). This swimming pool thermostat adopts advanced aluminum-plating zinc plates, effectively avoiding the hurt of exposure to the sun. The liner tank uses 304 stainless steel to feature durable and sturdy performance.
  • Adjustable Temperature: It is convenient for you to observe the change of temperature on the LCD at any time, and you can adjust the setting value easily through the touching screen. The electric SPA heater will automatically control the temperature ranged from 71.6 °F-122 °F (22 °C-50 °C). With the smart temperature sensor, the heating system is always under control and keeps non-fluctuation of the temperature.
  • Intelligent Self-test: The intelligent self-checking function not only can detect automatically to reach the set temperature, but also supervises the operational status of the heater in case of water absence. If the heater has the risk of high temperature, the heating system will stop working. This humanized design helps to keep you secure when you use the machine.
  • Ease To Assemble: The pool thermostat is not complicated to install. We provide you a detailed installation manual and 2 of 1.96inch (50mm) interfaces. Please distinguish the inlet pipe and the outlet pipe during your installation. It is recommended that you connect the water heater with a pump of at least 1.5HP (1.1KW) power.The diameter of the water pipe you use should be 1.5in(38mm) for a smooth flowing.
  • Wide Application: This high-quality electric pool water heater is commonly used indoors and outdoors, especially for swimming pools, SPA pools, and bathtubs. The digital heating system maintains a constant and comfortable temperature. For a better heating effect, you are suggested to use this water heater for a maximum of 1981 Gallon (7.5 CBM) pool equipment. Please do not use the heater in saltwater, acidic water, or alkaline water. Note: Cable wire without plug.
Rank No. #14
Balboa 25-175-1010 VS M7 OEM Heater Assembly, 5.5KW, 220V, 58083
  • Stainless steel heater housing
  • 5. 5Kw 220v 800 incoloy flo-thru heater element
  • Balboa oem m7 dual sensors, 12. 0"
  • Pair of 2. 0" heater split nuts and pair of 2. 0" heater tailpieces with o-ring gaskets
  • 1-year limited
Rank No. #15
Replacement Flo-Thru Hot Tub Spa Heater Element: 5.5kW or 4kW - Flow Through
  • Universal Incoloy 800 Spa Heater Element
  • Choice of wattage @ 240V & 120V
  • Superior quality
  • Fits standard 2" diameter hot tub heater manifold as illustrated
  • Fits Balboa M-7, Brett Aqualine, Hydroquip and many others
Rank No. #16
Smart Spa Supply 4.0kw 240v Titanium Flo-Thru Univeral Heater Element Replacement Hot Tub Heating
  • 4.0kw 240V
  • Long Life Titanium - 2 Year Limited Warranty
  • Universal Flo-Thur Spa Hot Tub Heater Element
  • Includes Hardware Kit - 2x Terminal Nuts 2x O-Rings 2x Jam Nuts
Rank No. #17
SpaGuts 25-150-1202 Universal Flo-Thru Heater Element, 5.5Kw, Titanium
  • Includes 1 heater element, 2 heater terminal nuts, 2 heater o-rings, and 2 heater jam nuts
  • Replacement heater element fits any spa controllers or spa packs that takes a universal hi-flo element
  • Available in 5.5 kw
  • Assembled in USA
  • 2-Year Limited Warranty
Rank No. #18
Smart Low-Flow Heater Replacement for Sundance Spa Hot Tub 5.5kW 6500-310/6500-301
  • 5.5kW @ 240V Titanium element - Low Flo
  • Fits Sundance spas 1995 & newer, 650-850 & 880 series
  • Includes High-Limit Sensor & Switch
  • Indicator lights for easy diagnostics
  • Wire harness sets for universal installation
Rank No. #20
4.0KW, Incoloy 800 Spaguts Universal Flo-Thru Heater Element
  • Made in United States
  • The package length is 6.858 centimeters
  • The package height is 6.35 centimeters
  • The package width is 29.718 centimeters

Last update on 2023-08-03 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Spa Heater?

Do you get stressed out thinking about shopping for a great Spa Heater? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Spa Heater, which is why we have assembled a comprehensive list of the greatest Spa Heater available in the current market. We’ve also come up with a list of questions that you probably have yourself.

We’ve done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for Spa Heater that you consider buying. Your questions might include the following:

  • Is it worth buying an Spa Heater?
  • What benefits are there with buying an Spa Heater?
  • What factors deserve consideration when shopping for an effective Spa Heater?
  • Why is it crucial to invest in any Spa Heater, much less the best one?
  • Which Spa Heater are good in the current market?
  • Where can you find information like this about Spa Heater?

We’re convinced that you likely have far more questions than just these regarding Spa Heater, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for Spa Heater, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible Spa Heater. Make sure that you are only using trustworthy and credible websites and sources.

We provide an Spa Heater buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information. How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available Spa Heater currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of Spa Heater has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an Spa Heater?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your Spa Heater.
  5. Customer Ratings: Number ratings grade Spa Heater objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Spa Heater.
  7. Product Quality: You don’t always get what you pay for with an Spa Heater, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an Spa Heater is should be an indication of how long it will work out for you.

We always remember that maintaining Spa Heater information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding Spa Heater is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

FAQ:

Q: Why is my hot springs spa not heating?

A: Low flow in your spa or hot tub is most commonly associated with a dirty spa filter. If your spa heater won’t heat, remove and clean the filter(s) rule out a pressure or flow rate problem. Low water level, a clogged pump impeller, closed valves, clogged pipes or blocked spa drain covers can also cause flow issues.

Q: How do you test a hot tub heater?

A: The best way to test a heater element is using an electrical tester. Turn off and remove all power to the spa, then remove the heater, you can then test hot tub heating elements for integrity, use an ohm meter on its lowest setting. With the meter’s test leads, measure the resistance between the two terminals.

Q: Are hot tub heaters Universal?

A: The simple answer to the question of “are hot tub heater universal?” is yes and no . There are a lot of different hot tub manufactures out there but only a limited amount of hot tub electronic manufactures. Because there is limited amount of electronic manufactures some of the parts become universal between brands.

Q: How does a hot tub heater work?

A: How a Hot Tub Heater Works. Every hot tub breaks down into two components: the shell and the cabinet. The shell is the weather-resistant outside. Just below the shell, the tub is supported by foam or fiberglass. The hot water is generated in the cabinet, which is made of polymer or wood. It stores the system of tubes, heaters and pumps.

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