Pool Care Journal

All
Pentair MasterTemp 400K BTU natural gas pool heater used in replacement heater guide
Pool Heater Replacement Guide: BTU, Fuel Type & Compatibility
Pool Supply DepotSep 14, 2026
A practical guide to replacing a pool or spa heater, including BTU size, natural gas vs propane, ASME requirements, plumbing, electrical, venting and automation compatibility.