Sterling xf150a1ns111 Gas Unit Heater 150000 Btu/h

Product Description

The STERLING xf150a1ns111 is a propeller-type, gas-fired unit heater designed for commercial and light commercial heating applications. It delivers 150,000 BTU/h input using natural gas and operates on a 115/1/60 volt supply. The unit achieves 83 percent thermal efficiency through an aluminized steel tubular heat exchanger paired with in-shot burner technology. A single-stage gas control and direct spark ignition system handle combustion sequencing. An integral power venter and combustion air pressure switch are built in. Licensed HVAC technicians and mechanical contractors are the intended installers for this type of equipment.

This unit heater is rated for elevations from 0 to 4,999 feet and is suited for warehouses, garages, manufacturing facilities, and similar commercial or light commercial spaces. A key design feature is convertible venting: the xf150a1ns111 ships ready for either standard combustion venting or separated combustion venting without any field modification to the unit. Separated combustion venting is recommended in environments with dust, high humidity, mildly corrosive conditions, or slightly negative building pressures. The unit ships with individually adjustable and removable horizontal louvers for directional airflow control and mounts via a 2-point suspension system.

Key Features

• 150,000 BTU/h natural gas input with 83 percent thermal efficiency
• Convertible venting: standard combustion or separated combustion without unit modification
• Aluminized steel tubular heat exchanger with in-shot burner technology
• ODP (Open Drip Proof) propeller motor with integral overload protection
• Direct spark ignition and high-limit switch for reliable, safe operation
• 20-gauge steel cabinetry with baked enamel finish and isolated control panel
• 10-year warranty on heat exchanger, burner, and flue collector

Compatibility

Designed as an OEM unit heater for commercial and light commercial gas heating systems requiring a propeller-type, tubular heat exchanger configuration rated for natural gas service at low-to-moderate elevations.

Installation Notes

Installation must be performed by a licensed HVAC or mechanical contractor in accordance with local mechanical codes, the IFGC, and the manufacturer installation instructions. Shut off the gas supply and disconnect electrical power before servicing or making any field connections. When configuring for separated combustion, connect combustion air piping to the rear inlet collars as specified in the installation manual. Verify venting material and configuration comply with local code requirements before startup.

Technical Specifications

• Input Capacity: 150,000 BTU/h
• Thermal Efficiency: 83 percent
• Fuel Type: Natural Gas
• Supply Voltage: 115/1/60 (115 volts, single phase, 60 Hz)
• Control Voltage: 24 volts
• Gas Control Stages: 1 Stage
• Motor Type: ODP (Open Drip Proof) Propeller Motor
• Heat Exchanger Material: Aluminized Steel Tubular
• Cabinet Material: 20-Gauge Steel with Baked Enamel Finish
• Ignition Type: Direct Spark
• Venting Type: Standard or Separated Combustion (convertible)
• Elevation Rating: 0 to 4,999 feet
• Mounting: 2-Point Suspension
• Heat Exchanger Warranty: 10 years

Standard Information

• Brand: STERLING
• Manufacturer Part Number: xf150a1ns111