Pentair
MasterTemp 125 Low NOx Pool Heater
Best efficient heating for smaller pools and spas.
The Pentair MasterTemp 125 is a high-performance natural gas pool heater designed for both in-ground and above-ground pools, as well as large hot tubs. It delivers a powerful 125,000 BTU output with an industry-leading 82% thermal efficiency, ensuring faster heating and lower operating costs. Engineered for durability, it features a corrosion-resistant bronze header system and a patented thermostatic bypass valve to prevent scaling and internal damage. Its user-friendly design includes a rotating digital display for easy programming and quiet operation. This heater is certified for low NOx emissions and can be installed indoors or outdoors.
$1994.00
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Owner Satisfaction
4.2
/ 5
Category Rank
439
/ 677
#439 in Pool Heaters
Price vs Category Average
+47%
Above average
Who it's for
- Homeowners with limited equipment pad space or smaller pools.
- Eco-aware pool owners prioritizing reduced environmental impact.
- Spa users and small pool owners desiring quick, reliable warmth.
Who should skip it
- Owners of medium to large pools needing faster, more robust heating.
- DIY enthusiasts or those seeking simple, plug-and-play heating.
- Budget-conscious users concerned about long-term operational expenditures.
What customers say
Customers consistently praise the MasterTemp 125 for its impressive heating speed and consistent temperature maintenance, making pool use comfortable even in cooler weather. Many appreciate its straightforward operation and compact design, which simplifies installation and daily use. While generally reliable, some users note the importance of professional installation and regular maintenance for optimal longevity. The consensus highlights its efficiency in warming pools quickly, providing a dependable and enjoyable swimming experience. This heater is often seen as a solid investment for those seeking prompt and effective pool heating.
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