Hayward H-Series H135FD vs Pentair MasterTemp 125

Last updated: October 31, 2026

The Pentair MasterTemp 125 and the Hayward H-Series H135FD are evenly matched, rated 2.6 and 2.6. The Pentair MasterTemp 125 leads on value. The Hayward H-Series H135FD wins on heating input. The Pentair MasterTemp 125 costs $301 less ($2,098 vs $2,399).

Hayward H-Series H135FD vs Pentair MasterTemp 125

Prices were last checked October 31, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.

Which should you buy?

Scores side by side

Each factor is scored 0-100 against the same fixed reference points for every under 250,000 BTU gas pool heater; a clear win is highlighted. How we rank explains each one.

Factor weightPentair MasterTemp 125Hayward H-Series H135FD
Overall rating2.6/52.6/5
Value 35%52 $16.78 per 1,000 BTU/h ($2,098, 125,000 BTU/h)43 $17.77 per 1,000 BTU/h ($2,399, 135,000 BTU/h)
Heating input 25%25 125,000 BTU/h35 135,000 BTU/h
Efficiency 20%33 82% thermal efficiency33 82% thermal efficiency
Warranty 20%0 1-year warranty0 1-year warranty

Specifications

Pentair MasterTemp 125Hayward H-Series H135FD
Heating
Gas input125,000 BTU/h135,000 BTU/h
Gas typeNatural gas or propaneNatural gas or propane
Thermal efficiency82%82%
CondensingNoNo
Low NOxYesYes
Heat exchanger-Cupro-nickel
Max water flow70 GPM125 GPM
Installation and controls
Ignition-Electronic
VentingBothOutdoor
Digital controlsYesYes
Automation or appYesYes
Weight80 lb100 lb
Warranty1 year1 year

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