Finding the right electric spa heater depends on pool or spa size, power availability, and desired temperature control. This guide summarizes reliable electric spa heaters, replacement elements, and heated foot-spa units so you can compare capacity, installation type, and control features at a glance.
| Product | Type | Key Feature |
|---|---|---|
| Coates 5.5 Kilowatt Electric Spa Heater | Inline Spa Heater | 18,772 BTU For 250–600 Gallons, Flow 15–80 GPM |
| Mxmoonant Pool Heater 11KW 220V | Electric Pool/Spa Heater | Touchscreen, Automatic Circulating Heating, 304 Stainless Tubes |
| Ximoon 5.5KW Titanium Flo-Thru Element | Replacement Heating Element | Titanium Flo-Thru Design, Universal Compatibility |
| Puboo Collapsible Foot Spa With Heat | Foot Spa With Built-In Heater | Precision Temp 95–115°F, Collapsible Storage |
| HOSPAN Collapsible Foot Spa FS02A | Foot Spa With Heat & Remote | Bubble Massage, 95–118°F, Remote Control |
Coates 5.5 Kilowatt Electric Spa Heater – 18,772 BTU’s
The Coates 5.5 kW electric spa heater is designed for inline installation and targeted at small to medium hot tubs. Its listed dimensions are 17.5″ L x 4″ W x 14″ H, making it compact for plumbing closets and equipment bays. The unit delivers 18,772 BTU, suitable for pools or spas sized roughly 250–600 gallons.
Operational flow range is noted as 15–80 GPM, so pump selection and plumbing diameter are important for efficient heat transfer. The heater’s compact form factor can simplify retrofits where space is constrained. As an electric inline unit it requires appropriate 240V wiring and breaker protection consistent with local codes.
Mxmoonant Pool Heater 11KW 220V – Touchscreen Pool/Spa Heater
The Mxmoonant 11 kW unit is a higher-capacity electric heater intended for above-ground and inground pools or larger spas. It uses a touchscreen display for temperature control and features an automatic cycling control that turns the heater on/off to maintain the preset temperature.
The heater includes 304 stainless steel heating tubes to improve thermal conductivity and corrosion resistance, speeding heating times. The automatic circulating heating function reduces manual intervention and helps maintain stable water temperature. Installation requires suitable 220V supply and proper circulation plumbing; check amperage and breaker requirements before purchase.
5.5KW 240V Titanium Flo-Thru Universal Heating Element
This 5.5 kW titanium flo-thru element is a replacement heating component compatible with many brands including Balboa, Gecko, Hydro’Quip, and others. It ships with mounting hardware including terminal nuts, o-rings, and jam nuts for direct swap installations in flo-thru housings.
Titanium construction offers improved corrosion resistance in chlorinated or saline environments compared to standard elements. The universal design supports use in spa electric heaters or some pool systems, but the housing must be a flo-thru metal tube. Keeping a spare element on hand can reduce downtime if an OEM element fails.
Puboo Collapsible Foot Spa With Heat And Remote
The Puboo collapsible foot spa integrates an internal heating system offering precise temperature control from 95°F to 115°F with 1°F precision and an intelligent reheating function. It’s designed for compact storage, folding to 5.5 inches high when not in use.
Features include a reinforced support frame for stability, an internal water pipe system for even heat distribution, a built-in herb infuser, and a cobblestone heel for foot stability. The unit targets home wellness and foot therapy rather than pool or full spa heating but represents a convenient heated-water solution for personal use.
HOSPAN Collapsible Foot Spa Electric Rotary Massage FS02A
The HOSPAN FS02A foot spa blends massage features with a heating system that maintains temperatures between 95°F and 118°F. It includes bubble massage, six groups of 3D Tai Chi massage balls, and three massage modes: continuous, intermittent, and intelligent.
A magnetic remote control allows hands-free adjustments and the unit is designed to auto-maintain water temperature without frequent hot water top-ups. This device is targeted for foot therapy, offering a heated soak and circulation-boosting massage rather than whole-spa heating capacity.
Buying Guide: How To Choose An Electric Spa Heater
Determine Pool Or Spa Volume And Required Output: Calculate your water volume in gallons. Match heater capacity (kW or BTU) to the volume and desired temperature rise. Higher kW (or BTU) heats faster; smaller units need longer runtimes.
Electrical Supply And Circuit Requirements: Verify available service (120V vs 240V) and breaker capacity. Most spa and pool electric heaters require dedicated 240V circuits and appropriately sized breakers and wiring. Consult a licensed electrician for code-compliant installation and load calculations.
Flow Rate And Plumbing Compatibility: Inline and flo-thru heaters list operational flow ranges (e.g., 15–80 GPM). Ensure your pump and plumbing produce adequate flow for efficient heat transfer. Low flow can trigger protection switches or reduce heating efficiency.
Material And Corrosion Resistance: Heating elements may be copper, stainless steel, or titanium. Titanium offers superior corrosion resistance for salt or bromine systems; stainless 304 is good for many pools. Choose a material compatible with your sanitizer and water chemistry.
Control And User Interface: Consider thermostatic control, touchscreen displays, and programmable settings. Precision controls with digital displays allow closer temperature regulation and may improve energy usage by minimizing overshoot.
Automatic Temperature Maintenance: Look for heaters with automatic cycling or thermostatic shutoff to maintain setpoint without manual intervention. This reduces energy waste and provides consistent comfort.
Replacement Parts And Compatibility: For existing equipment, confirm replacement element compatibility (flo-thru vs enclosed housing). Universal elements can be helpful, but housing fit and terminal configurations must match to avoid installation issues.
Safety Features: Seek overheat protection, flow switches, and pressure or temperature cutouts. These prevent dry-run heating, scalding, and equipment damage. For portable heated units, tip-over and overheat protection are important.
Installation And Serviceability: Evaluate ease of access for maintenance and element replacement. Units with standard fittings and included hardware reduce install time. For built-in systems, allow service clearance around the heater.
Energy Use And Run Time: Higher kW ratings heat faster but draw greater current. Balance runtime and power availability; sometimes a lower-kW heater running strategically with a cover can be more energy-efficient than constant high-power operation.
Use Case: Foot Spa Vs Pool/Spa Heater: Foot spas with integrated heaters and precise temperature controls are ideal for personal wellness and therapy. They are not substitutes for pool or hot tub heaters, which require higher capacity and dedicated electrical service.
Comparison Perspectives:
- Capacity vs. Speed: Higher kW heats faster but requires heavier electrical infrastructure.
- Material vs. Durability: Titanium/stainless elements extend life in corrosive environments.
- Control vs. Convenience: Touchscreens and auto-cycling reduce hands-on adjustments.
- Portability vs. Power: Portable foot spas are convenient and low-power; inline pool heaters provide sustained heating for larger volumes.
Installation Checklist: Confirm breaker size, wire gauge, flow rate compatibility, clearance for service, and compliance with local codes. For replacement elements, bring current element specs or photos to ensure compatibility.