Product Overview

The Pentair MasterTemp ASME 250 Natural Gas Heater delivers fast, efficient pool and spa heating in a compact, commercial-ready design. With 250,000 BTU heating performance, ASME certification, and natural gas operation, this heater is built for demanding residential, commercial, and code-compliant installations.

Designed for convenience and reliability, the MasterTemp 460771 features digital controls, a rotating display, low NOx emissions, quiet operation, and a durable rustproof exterior. Its ASME-certified construction and bronze header design make it a strong choice for hotels, apartments, condos, schools, community pools, and high-end residential pools where dependable heating matters.

Ideal For

• Commercial pools and spas
• Apartment, condo, hotel, and motel pools
• Schools, parks, and community aquatic facilities
• High-end residential pools requiring ASME-rated equipment
• Pool owners wanting fast heat-up and efficient natural gas performance

Key Features

• 250,000 BTU Heating Capacity — Provides strong heating performance for pools and spas.
• ASME Certified — Suitable for commercial and code-compliant applications.
• Natural Gas Operation — Designed for natural gas pool and spa heating systems.
• Low NOx Certified — Eco-friendly heater design that meets low-emission standards.
• Digital Controls — Easy-to-use interface for simple temperature control.
• Rotating Digital Display — Allows easier viewing depending on equipment pad layout.
• Compact Cabinet Design — Fits into many equipment pad layouts while delivering high performance.
• Rustproof Composite Exterior — Built to handle outdoor equipment pad conditions.
• Bronze Header Design — ASME configuration includes bronze header construction for commercial durability and serviceability.
• Indoor / Outdoor Application — Listed for commercial, indoor, outdoor, pool, and spa applications.

Benefits

The Pentair MasterTemp ASME 250 is built for pool owners and property managers who need dependable heat without unnecessary complexity. Its 250K BTU output helps reduce wait times, while the digital controls make daily operation straightforward.

The ASME-certified design makes this model especially useful for commercial and regulated installations. Low NOx performance, efficient operation up to 84%, and a compact cabinet help balance performance, compliance, and equipment pad space.

Specifications

Customer-Facing Q&A

Q: Is the Pentair 460771 heater natural gas or propane?
A: This model is designed for natural gas. For propane installations, a different model is required.

Q: Is this heater ASME certified?
A: Yes. The Pentair MasterTemp 460771 is an ASME-certified heater, making it suitable for many commercial and code-compliant pool and spa applications.

Q: Can this heater be used for a residential pool?
A: Yes, it can be used for residential applications, but it is especially suited for commercial or high-demand installations where ASME certification is required.

Q: What size is this heater?
A: The cabinet measures approximately 23.02 in. wide x 32.61 in. deep x 28.15 in. high.

Q: Does this heater have digital controls?
A: Yes. The MasterTemp 460771 includes digital controls and a rotating digital display for easier operation and viewing.

Q: Is this a low-emissions heater?
A: Yes. The MasterTemp heater is listed as Low NOx certified, making it a more environmentally friendly gas heater option.