Pentair | 460805 | MasterTemp 400HD Natural Gas Pool & Spa Heater, 400K BTU, Cupro-Nickel
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The Pentair 460805 is a MasterTemp 400HD natural gas pool and spa heater rated at 400,000 BTU. The HD designation means a cupro-nickel heat exchanger, which is what you want on saltwater pools, low pH water, and high flow installations.
Features
- 400,000 BTU output for large pools and fast spa recovery
- Cupro-nickel heat exchanger resists corrosion and scale in aggressive water chemistry
- Low NOx certified combustion meets clean air standards in regulated regions
- Rotating digital display with menu driven diagnostics
- Connects to Pentair automation systems for remote control and push alerts
- Compact, rustproof exterior certified for indoor and outdoor installation
- Optional Smart Heater Bypass Valve Kit can cut operating cost by up to 35%
Specifications
- Brand: Pentair
- Manufacturer part number: 460805
- Heating capacity: 400,000 BTU
- Fuel: Natural gas
- Heat exchanger: Cupro-nickel
- Series: MasterTemp 400HD, TradeGrade
- UPC: 788379745479
Frequently Asked Questions
What does HD mean on a MasterTemp?
HD is the heavy duty version, built with a cupro-nickel heat exchanger instead of copper. It handles saltwater, low pH, high flow, and generally harsher water chemistry.
Should I buy the 460805 HD or the standard 460736?
Choose the HD if you run a saltwater pool, your water chemistry swings, or you have had a heat exchanger fail before. The standard 460736 is the better value on typical residential water.
Is the 460805 natural gas or propane?
Natural gas. Fuel is set by model.
What size pool does 400,000 BTU suit?
Large in-ground pools and pool and spa combinations. Sizing depends on surface area, temperature rise, and climate, so have a pool professional size it for your install.
Is it Low NOx compliant?
Yes. MasterTemp heaters are Low NOx certified, which is required in California and other regulated air quality districts.
Does it work with pool automation?
Yes. It integrates with Pentair automation systems for remote temperature control, scheduling, and status notifications.
Does it need professional installation?
Yes. Gas sizing, venting, electrical, and local code make this a licensed installer job, and improper installation can affect warranty coverage.
Sold by AppaeTech Pool Supply, an authorized Pentair reseller.