★★★☆☆
Gets warm but noisy
It does heat the pool effectively and pretty quickly, which is good. However, the heater is quite noisy when it's running. It's much louder than I was expecting, which can be a bit distracting when sitting by the pool.
Pentair
Pentair MasterTemp 400K BTU Pool Heater
$2,999.99
● In stock
Color
Grey
Size
Natural GasPropane
- Quickly heats large pools and spas
- Precise temperature control with digital interface
- Durable stainless steel construction
Free US shipping (5–7 business days) · 30-day returns · Sold by Cartivo (demo store — payments are simulated)
About this item
400K BTU high-performance heater with digital controls. Heats pools and spas fast with 84% thermal efficiency.
Specifications
| Type | Pool Heater |
|---|---|
| Warranty | 1-year limited |
| Fuel Type | Natural Gas, Propane |
| BTU Output | 400,000 BTU |
| Dimensions | 21 in. W x 28 in. H x 21 in. D |
| Efficiency | 84% |
| Pool Size (Gallons) | Up to 40,000 gallons |
Customer reviews
What customers say: This pool heater quickly warms pools and spas, with many enjoying its powerful and efficient heating. A few found the controls less intuitive or noted higher operating noise.
★★★★★
Extends pool season greatly
This Natural Gas heater has been an excellent investment for our family. It heats our large pool quickly and consistently, allowing us to enjoy it for many more months out of the year. The controls are intuitive, and it's reliable.
★★★★★
Fantastic pool warmth
We finally have a truly warm pool, even on cooler days. This Natural Gas heater does an amazing job, heating our 40,000 gallon pool from chilly to comfortable in a reasonable amount of time. The digital interface is straightforward, and the unit itself is solidly built. It's made our pool much more enjoyable for the kids and for us.
★★★★★
Excellent heating power
The 400K BTU really delivers. Our pool is warm and ready whenever we want to use it, even in cooler weather. This Natural Gas unit is powerful and efficient, keeping our heating costs reasonable for the comfort it provides.
★☆☆☆☆
Broken after a month
The heater stopped working entirely after only a month of use. It makes a clicking sound but doesn't ignite. I'm very disappointed with the durability of this Propane unit. This kind of problem so soon is unacceptable.