Warren Technologies SL15B Electric Duct Heater 15kw 240V

Product Description

The WARREN TECHNOLOGIES SL15B is a slip-in electric duct heater rated at 15 kilowatts and 240 volts AC, single-phase, with a 60-amp current draw. It is designed for installation directly into forced-air duct systems, where it generates resistive heat using nickel chrome heating elements mounted within a galvanized steel control panel and frame. HVAC technicians install this unit in residential and light commercial applications where electric heat is needed either as a primary heat source or as a supplementary or standby heat source alongside a heat pump, gas, or oil-fired system. The slip-in design allows field installation without major duct modification.

The SL15B is suited for residential and light commercial forced-air duct systems operating on 240-volt AC single-phase power. It can serve as the sole heat source in an all-electric system or as a supplementary or standby heating element paired with a heat pump, gas, or oil-fired system. Multiple units can be installed in a large duct or across branch ducts for zone heating, with each unit controlled by a separate thermostat. This flexibility makes the SL15B a practical choice for multi-zone residential retrofits and light commercial build-outs.

Key Features

• 15 kW output at 240 volts AC single-phase provides substantial resistive heating capacity
• Slip-in mounting style simplifies field installation into existing rectangular ductwork
• Nickel chrome heating elements offer resistance to oxidation under repeated thermal cycling
• Galvanized steel control panel and frame for durability in duct environments
• Thermostat control compatibility allows zone-by-zone temperature management
• UL listed for use in residential and light commercial forced-air applications

Compatibility

Designed for use in residential and light commercial forced-air duct systems. Compatible with heat pump, gas, and oil-fired systems when used as supplementary or standby heat. Multiple units may be deployed in large duct runs or branch duct configurations for zoned thermostat control.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with local electrical codes and the NEC. Disconnect and lock out all power to the air handler and duct system before inserting or wiring the heater. Verify that the branch circuit ampacity and overcurrent protection match the 60-amp, 240-volt single-phase requirements before energizing. Do not operate the unit without adequate airflow across the elements, as insufficient airflow will cause overheating and may activate thermal safety devices.

Technical Specifications

• Voltage Rating: 240 volts AC
• Power Rating: 15 kW
• Current Rating: 60 amps
• Number of Phases: 1
• Control Type: Thermostat
• Type: Slip-In
• Width: 22 inches
• Height: 14 inches
• Frame and Control Panel Material: Galvanized steel
• Element Material: Nickel chrome
• Weight: 20 pounds
• Approval: UL
• Application: Residential, Light Commercial

Standard Information

• Brand: WARREN TECHNOLOGIES
• Manufacturer Part Number: SL15B