Mestek xf300a1ns1110 Commercial Unit Heater 300000 Btu/h

Product Description

The MESTEK xf300a1ns1110 is a power-vented commercial unit heater rated at 300,000 BTU/h input on natural gas. It operates at 83% thermal efficiency (AFUE) with single-stage direct spark ignition and an aluminum heat exchanger. The unit runs on 115 volts and is driven by two 1/4 HP open drip-proof (ODP) motors. Designed for commercial and industrial heating applications, this heater supports both standard venting and separated combustion configurations, giving installers flexibility in tight or air-quality-sensitive spaces. Licensed commercial HVAC contractors are the typical installing trade for a unit of this capacity.

The xf300a1ns1110 is suited for large commercial spaces requiring high-output forced-air heat — warehouses, manufacturing facilities, loading docks, hangars, and large mechanical rooms. The power-vented design allows installation where natural draft is not practical. The separated combustion option enables the unit to draw outside air for combustion, which is useful in tightly sealed buildings or environments where indoor air contamination is a concern. At 311 pounds, the unit requires proper structural support and rigging during installation.

Key Features

• 300,000 BTU/h natural gas input for high-output commercial heating
• 83% AFUE single-stage operation for consistent, predictable heat delivery
• Direct spark ignition eliminates standing pilot for reliable cold-start performance
• Aluminum heat exchanger provides corrosion resistance in demanding environments
• Two 1/4 HP ODP motors for dual-fan air distribution
• Power-vented design supports standard vent or separated combustion configurations

Compatibility

Designed as an OEM-specification commercial unit heater for high-capacity natural gas heating systems in commercial and industrial installations requiring power-vented or separated combustion configurations.

Installation Notes

Installation must be performed by a licensed commercial HVAC contractor in accordance with applicable local mechanical codes and the National Fuel Gas Code (NFPA 54 / ANSI Z223.1). Shut off the gas supply and disconnect electrical power before servicing. At 311 pounds, adequate structural support and proper rigging are required during mounting — verify ceiling or overhead support ratings before hanging. Venting must be sized and routed per the manufacturer specifications and local authority having jurisdiction requirements.

Technical Specifications

• Input Capacity: 300,000 BTU/h
• Fuel Type: Natural Gas
• Voltage: 115 volts
• AFUE: 83%
• Ignition Type: Direct Spark
• Heat Exchanger Material: Aluminum
• Motor Configuration: Two 1/4 HP ODP Motors
• Venting: Power Vented — Standard Vent or Separated Combustion
• Staging: Single Stage
• Weight: 311 pounds

Standard Information

• Brand: MESTEK
• Manufacturer Part Number: xf300a1ns1110