The Best Spa Heater - October 2021

Based on the analysis of 2,170 reviews.



Best Value
UCEDER Pool spa Part hot tub LX H20 Rs1 Thermostat 110V 2kw with Adjustable Temperature Thermostat product image


Balboa M7 Hot Tub Spa Heater Assembly OEM w Sensors 4 0kW 240V 1 0kW 120V product image


Replacement Flo Thu Spa Heater Element product image


VEVOR Electric Pool Heater 11KW 220V Swimming Pool Electric Heater SPA Water Bath Heater Electric product image


Balboa 25 175 1010 VS M7 OEM Heater Assembly 5 5KW 220V 58083 product image


Best Seller
Intex 28431E PureSpa Plus 85in x 28in Outdoor Portable Inflatable 6 Person Round Hot Tub Spa product image


Ecosmart US Smart SPA 11 product image


GENERIC Incoloy 800 Universal Flo Thru product image


Ecosmart 5 5 Smart Electric Spa Heater product image


Smart Low Flow Heater Replacement for Sundance Spa Hot Tub 5 5kW 6500 310 6500 301 product image

Top Spa Heater Brands


At Pentair, we've revolutionized the swimming pool business with innovative and high-performance pool pumps, filters, heaters, cleaners, lighting, automation systems and more. Each item is expertly engineered and crafted with spa and pool owners in your mind, and also adheres to our rigorous criteria for quality performance and design.

Decades of commitment to reliable, technologically advanced, and economical pool products has built our reputation as the pool industry's international leader. Join the millions of spa and pool owners around the globe who rely on Pentair to bring their poolscape dreams to life.

See all Pentair products

Ecosmart US

Classic tank heaters waste energy via heat that is lost, take up a lot of space, can rupture and rust and may frequently run out of hot water when you want it most. With a slick design and technology, EcoSmart's water heaters not just save cash revolutionize the industry, zero floor space is taken up by them, are lightweight and provide endless hot water that is instant. EcoSmart's patented self-modulating technology simply consumes the specific amount of energy  needed   to warm the the quantity of hot water needed, which may save  up to 50% on water hating costs a month!  

Smart Features

  • Infinite hot water
  • Saves up to 60 percent in water heating prices**
  • The Most Sophisticated, self-modulating tech
  • Lifetime guarantee*
  • compact layout, more storage space
  • Digital, temperature controller, 1-degree increments

Smart Applications

  • Cabinets, showers & baths
  • Washing machines & dishwashers
  • Warehouses & offices
  • Hospitals, hotels & restaurants
  • RV's & boats


**Based on a 10-minute bath at 105 degrees Fahrenheit employing an ECO-8 electrical water heater in contrast to the same shower and warmth with water coming from an 40-gallon tank. By eliminating heat loss, savings additionally include 18-22 percent. *Lifetime warranty valid for versions ECO 8 - ECO 36.   †Select models. © 2014 EcoSmart Green Energy Products, Inc.. All rights reserved.

See all Ecosmart US products