20 Best Coil Heat Exchanger For Hot Tub of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best Coil Heat Exchanger For Hot Tub of 2023. Check our ranking below.

2,723 Reviews Scanned

Rank No. #1

QUELECO Stainless Steel Heating Coil Heat Exchanger Food Grade Coil Heater for Outdoor Wood Fire Heated Hot Dutch Bath Tub

【Customizable】Our heat exchangers can be customized in dimension, water connector, and heat exchange capacity. If you have any special requirements, please let us know.
【Material】Our heater spiral coil is made of food grade 304 stainless steel , has a longer service life compared to copper materials. Its anti-corrosion function and hard material will save you more costs for product repair and maintenance.
【Parameter】304 stainless steel tubing: Outer Diameter 1" x 0.06" Wall x 29' Total Length, with 3/4" Male NPT. No need electricity or gas, heat water just by burning wood,then enjoy a good outdoor bath.
【Applications】Wood fired hot tub coil heater, heating coil kit for outdoor unit hot tub.They are always used to heating the water in tank, barrel, tub or swimming pool by burning wood pieces. It is the key part and accessory if you want to building or commerical making a wooden fired hot tub in backyard.
【Warranty】Our heating coil heat exchanger has a 1-year warranty. If you have any questions about the product, please feel free to contact us.

SaleRank No. #2

FanceSwim Outdoor Wood Burning Heater for Hot Tub, Portable Wood Fired Hot Tub Heaters,Titanium Coil Heat Exchanger Heating for Spas, Small Swiming Pools Heating Stove

[Enjoy the Ultimate Spa]: Elevate your outdoor spa experience. What you need is an efficient, low-operating-cost heating system—an FanceSwim wood burning stove for your pool that enhances your spa experience during chilly winters! It makes an ideal gift for family and friends during Christmas, New Year, and other occasions.
[Firewood Fast Heating, Save Money and High Efficiency]: This wood burning heater runs on firewood; no electricity, solar or gas is required. The titanium coil tubing heating coil is designed for excellent thermal conductivity, your hot tub will be ready to use within a couple of hours. With its exceptional corrosion resistance, titanium coil tubing guarantees a longer service life.
[Perfect Wood-Fired Hot Tub Heater, Widely Used]:The wood-fired heater is ideal for small inflatable pools, hot tubs, and bathtubs, but not for large pools. It continuously heats the water by burning firewood.The long chimney design makes it easy to light, burns wood efficiently, and minimizes ash and smoke. Enjoy a comfortable water temperature in your pool year-round with its powerful heating capabilities.
[Portable and Safe to Use]: This portable wood burning heater is easy to assemble and operate, standing at 58"/147.5 cm tall. Its compact design features a stable four-corner base, allowing for easy movement around your outdoor space. Made from durable, waterproof stainless steel, it does not produce odors, chemicals, or fumes. By burning firewood at the bottom, you can enjoy a warm spa experience. Note that the tube may darken after prolonged use, which is normal.
[Satisfaction Guarantee]: Please feel free to purchase our wood heater. If you encounter any problems during use, do not hesitate.

Rank No. #3

AB 300 kBTU Heat Exchanger for Outdoor Wood Boiler/Swimming Pool/Solar/Spa/w chlorinated Water, Stainless Steel 316L Opposite Ports 2" & 1 1/2" FPT

Pool Heating Capacity: up to 23,800 gallon 300 kBtu/hr fresh pool based on 60°C (140°F) temperature difference between incoming heating and heated water
Fully made of high grade anti-corrosion stainless steel 316L for swimming pool, spa, hot tub with chemical treatment.
This unit comes with 1 year warranty.
2" FPT opposite side for pool water and 1 1/2" FPT for hot water
Various applications: Pool/spa/hot tub heating, outdoor wood furnaces, hydronic heating, forced air heating, floor radiant heating, snow melting, solar water heating

Rank No. #4

8x8 Water to Air Heat Exchanger Hot Water Coil Outdoor Wood Furnace

1" Copper Connections

Rank No. #5

Fexhull Hot Tub Heater for 1995+ Hot Spring/Watkins - Spa Heater 4kW Titanium w/Sensors- 73791（1kw/4kW 120V/240V 8.3A/16.6A）

【𝐃𝐢𝐫𝐞𝐜𝐭 𝐅𝐢𝐭𝐦𝐞𝐧𝐭】Hot Tub Heater fit for 1995+ Hot Spring/Watkins, Fit for Watkins Heater Cross Reference MATRIX 26-C3160-2S, C3160-2S, 73039, 73791, 76228, C3564-2, 25-250-1022.
【𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐒𝐩𝐞𝐜𝐢𝐟𝐢𝐜𝐚𝐭𝐢𝐨𝐧】Spa Heater Titanium Heater with Sensor 𝐀𝐦𝐩𝐬: 8.3A/16.6A 𝐕𝐨𝐥𝐭𝐚𝐠𝐞: 120V /240V 𝐏𝐨𝐰𝐞𝐫: 1kw/4kw. 𝐎𝐄: C3160-2S C3160-2 C3564-2 73791 73039
【𝐒𝐚𝐟𝐞𝐭𝐲 𝐃𝐞𝐬𝐢𝐠𝐧】Spa heater element is fabricated with Titanium steel, water heaters are designed with intelligent temperature control and automatically cut off the power when the water temperature reaches 75 ° C (165°F).
【𝐅𝐚𝐬𝐭 𝐇𝐞𝐚𝐭𝐢𝐧𝐠】Hot spa heater element can be utilized not only for hot tub and bathtubs, but also for spa pools. Whether you are heating an hot tub, an indoor spa, this hot springs spa parts will fulfill all your requirements for the whole weather.
【𝐖𝐚𝐫𝐧𝐢𝐧𝐠】Double Barrel Heater Assembly is recommended not to use more than one hour, you need to quickly heat a lot of water can use more than one water heater at the same time, But never plug two water heaters into the same socket to avoid causing a fire.

Last update on 2025-07-09 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Coil Heat Exchanger For Hot Tub?

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FAQ:

Q: Can a hot tub be used as a heat exchanger?

A: Use an outdoor wood furnace in connection with a hot tub heat exchanger or a swimming pool heat exchanger to heat your pool or hot tub. You can use an outdoor wood burning furnace to heat your swimming pool or hot tub. The outdoor wood boiler has a second set of ports, standard.

Q: Can a Bowman heat exchanger be used in a hot tub?

A: Consequently, many hot tub users, especially those in the commercial sector, are switching to a new type of heating system, using an external boiler, linked to a Bowman heat exchanger.

Q: How does a shell and tube heat exchanger work?

A: The tube and shell needed is determined by your pool or spa gallons of water. This kit listed above will keep your pool temperature within one degree. The shell and tube heat exchanger splices into your pool pump and filter plumbing, and then the water is heated.

Q: How does a heat exchanger in a swimming pool work?

A: Swimming pool heat exchangers work by transferring heat energy from a hot water circuit, to the cooler pool water circuit, without the two fluids ever coming in direct contact with each other. Most swimming pools are heated via a boiler, using fuels such as Gas, LPG or Biomass, as the energy source.

Coil Heat Exchanger For Hot Tub