Description: Chromalox Type H, M, and L Electric Ventilation Duct Heaters are designed for use in heating, ventilation, and air conditioning systems, meeting Military Specification MIL-PRF-22594B and MIL-H-22594A.

Features: The heaters feature MONEL® Fintube Heating Elements with nickel chromium resistance wire, providing corrosion resistance and long life. Hermetic seals prevent moisture ingress, and the heater casing is made of stainless steel with pre-drilled flanged connections. The electrical terminal enclosure is spray-tight and fully gasketed.

Specifications: The heaters range from 0.5 to 183.0 kW, with voltage options of 115 or 440 Volts 3 Phase. They are qualified for shock and vibration tests per Military Specifications MIL-S-901 and MIL-STD-167-1.

Safety and Testing: A manual reset cutout thermostat limits surface temperature to 750˚F. Electrical tests include circuit strength, insulation resistance, moisture resistance, dielectric strength, and kilowatt rating verification. First Article Inspection Tests cover accelerated life tests, operational performance, maintainability, shock, and vibration tests.

Dimensional Data: The document provides detailed specifications and dimensions for various heater sizes and configurations, including part numbers for ordering.