--- product_id: 550689931 title: "Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired)" brand: "mxmoonant" price: "€ 586.23" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.hr/products/550689931-pool-heater-3kw-220-240v-electric-hot-tub-heater-water store_origin: HR region: Croatia --- # 3KW Power Output Auto Temp Control Multi-layer Safety Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired) **Brand:** mxmoonant **Price:** € 586.23 **Availability:** ✅ In Stock ## Summary > 🔥 Heat your oasis smartly, stay cozy effortlessly! ## Quick Answers - **What is this?** Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired) by mxmoonant - **How much does it cost?** € 586.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/550689931-pool-heater-3kw-220-240v-electric-hot-tub-heater-water) ## Best For - mxmoonant enthusiasts ## Why This Product - Trusted mxmoonant brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **High Temp Safety Cutoff:** Prevents overheating by tripping at 50°C, ensuring worry-free use. - • **Universal Fit Connectors:** Includes dual PVC pipe adapters (48mm & 50mm) for seamless integration with your 500-gallon pool or spa. - • **Pro-Grade Hardwired Setup:** Designed for high voltage efficiency—professional installation recommended for peak performance. - • **Smart Self-Heating Control:** Automatically maintains your perfect spa temperature without lifting a finger. - • **Advanced Dry Burn Protection:** Pressure switch shuts off power instantly if water flow drops, safeguarding your heater. ## Overview The Mxmoonant Pool Heater is a robust 3KW electric heater designed for pools and spas up to 500 gallons. Featuring automatic temperature regulation, dry burn prevention, and high-temperature safety cutoffs, it ensures efficient and safe heating. Its hardwired design supports high power output, while included dual PVC connectors offer versatile installation options. ## Description efficient ## Features - [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. ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B0BNTB1N8B | | Batteries Included | No | | Brand | Mxmoonant | | Color | White | | Customer Reviews | 3.3 3.3 out of 5 stars (60) 3.3 out of 5 stars | | Date First Available | 1 August 2023 | | Item Model Number | WJW-2 | | Manufacturer | Mxmoonant | | Power Source | ac | | Product Dimensions | 19.2 x 11.99 x 14 cm; 2.48 kg | ## Images ![Pool Heater 3KW 220 240V, Electric Hot Tub Heater Water Thermostat with Temperature Control Self Heating for 500 Gals Spa, Bathtub, Swimming Pool (Hardwired) - Image 1](https://m.media-amazon.com/images/I/616N5FG1DpL.jpg) ## Questions & Answers **Q: How long does it take to heat up a 400 gallon hot tub?** A: For a 400 gallons pool, an 3KW pool heater takes about 3.5h to raise the temperature by 41 degrees ℉. 7.3h to raise the temperature by 50 degrees ℉. **Q: What is the largest size pool it works on?** A: Hello there, capacity between 250 and 500 gallons is appropriate. Although pools over 500 gallons are available, but the pool heater may not achieve effective heating. **Q: What gallon per hour pump is recommended?** A: Hi there, it is recommended to use a 1/2 hp water pump with the pool heater. **Q: Will the red light go on if there's no water in it? I want to test it before I run water through it** A: Hello there, we recommend that you run the water first before starting the pool heater, if you do not run the water to open the heater, the light will be on, but it will dry out. It is not conducive to the long-term use of the item. ## Customer Reviews ### ⭐⭐⭐⭐⭐ An affordable small spa heater that works *by on Reviewed in the United States 15 November 2024* I built a DIY hot tub out of 150 gallon stock tank, with ~85 gallons of water when it's full. Well, I'd originally intended the tub as a cold plunge, but the allure of making it a 2-in-1 was too great. I tried a heater from another company, and wasn't able to ever get the thing to turn on, which I assume was due to the pressure switch not receiving adequate flow. I had it plumbed in kind of a weird way: from the pump, I had a 3-way valve that diverted either to the chiller branch or the heater branch, then a second 3-way valve from the outputs of the heater/chiller back into the filtration system and then into the tub. I suspect that the resistance from this complicated system was a bit too much for the pressure switch in the heater, which is why I never got it to work.After returning my old heater, I got this one and plumbed it inline right after the pump, and lo and behold, it worked! I put it on a 30A GFCI breaker (which is way overkill for the ~13A this thing would pull), with two 110V legs to give it to the 220V it needs. With the small quantity of water in my tub and heavy insulation I added to the cavity that holds the tank, I can get it from ~70F to ~103F within 2-3 hours, and it has no trouble staying there in outside temperatures of ~40F.PROS: The case is made out of metal and the little unit feels quite sturdy as a result. The controls are dead-simple, just a knob to change it from off to its maximum of 40C (~104F). I really appreciate the addition of a light that shows when it's working; the old heater didn't have that. It came with a few PVC fittings, including two 1.5" ID unions that I was able to plumb into my system without much trouble.CONS: I wish it got hotter! Also, like a lot of spa heaters the PVC fitting are some custom size/threading, so if you solvent-weld them incorrectly you're kind of SOL, so be careful.In summary, I had no issues getting it to work, and I love having a hot tub. For the price, it's a great little unit. ### ⭐ DO NOT BUY! *by on Reviewed in the United States 5 March 2026* Works great for a few weeks, then starts tripping the GFCI breaker. This is my third one. Total junk. ### ⭐⭐⭐⭐⭐ Great little heater! *by on Reviewed in the United States 21 September 2024* This heater very easily keeps up with our 5000 gal. pool. (northern Indiana).I have a timer that allows the pump to run 12 hours a day, and that gives the heater enough time to do its job, and automatically kicks on and off as the pump does, due to its internal flow sensor.Our first heater developed an issue with the thermostat, so I informed Amazon and they referred me to the manufacturer, who soon contacted me.Ashley was very helpful, responsive, and effective. With a couple interactions via email, they were soon sending me a new one. I would highly recommend this small and mighty heater, and also this company.Note: This heater was very easy to install; the original ones did not come with gaskets but I believe the newer ones do now. ## Frequently Bought Together - 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) - Intex Replacement Hose Adapter A w/Collar for Threaded Connection Pumps (Pair) - Mxmoonant Pool Heater 11KW 220V, Electric Swimming Pool Heaters Hot Tub Water Thermostat with Touchscreeen for Above Ground Inground Pool, Spa, Bathtub, --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/550689931-pool-heater-3kw-220-240v-electric-hot-tub-heater-water](https://www.desertcart.hr/products/550689931-pool-heater-3kw-220-240v-electric-hot-tub-heater-water) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-09-28*