Low Intensity Infrared Tube Heater: Complete Guide

A low intensity infrared tube heater is a ceiling-mounted radiant heating system that warms floors, equipment, vehicles, and people directly instead of primarily heating air. Gas-fired models use a burner and radiant tube assembly to emit long-wave infrared energy. This approach is especially effective in high-bay, drafty, or door-cycling buildings where forced-air heat is easily displaced.

Low intensity radiant tube heaters provide broad, even coverage for large indoor spaces such as warehouses, hangars, plants, service bays, ice arenas, and agricultural buildings. High-intensity ceramic heaters reach maximum operating temperature in under one minute and are typically used for spot or zone heating, loading docks, protected outdoor areas, and work cells requiring instant-on heat.

Combustion Research Corporation documents energy savings of 30-50% compared with conventional forced-air heating in similar commercial applications. Savings come from heating occupied surfaces instead of unused ceiling air, faster thermal recovery after overhead doors close, and better comfort at lower air temperatures. Some applications may also qualify for commercial gas utility rebates.

Sizing depends on building square footage, insulation, ceiling height, door cycle frequency, fuel type, and desired temperature. As a general reference, low-bay insulated warehouses may need 25-40 BTU per square foot, while high-bay or poorly insulated spaces may require 40-65+ BTU per square foot. CRC provides calculators and representative support for facility-specific sizing.

CRC’s low intensity systems are commonly specified for warehouses, distribution centers, aircraft hangars, manufacturing plants, auto dealership service bays, CNG repair facilities, ice arenas, natatoriums, military vehicle bays, barns, animal confinement buildings, and pole barns. The best model depends on ceiling height, corrosion exposure, fuel availability, and whether the project needs full-building or zone heating.

Reflect-O-Ray is CRC’s custom-engineered vacuum radiant tube heater family, often used for large or complex facilities requiring optimized coverage and efficiency. Omega II is a power-vented, unitary tube heater suited to straightforward commercial and industrial layouts. Vacuum systems are generally more efficient, while power-vented systems can be faster to specify for smaller zones.

Clearances vary by model, configuration, firing rate, mounting angle, and nearby combustible materials. CRC product submittals list required clearances, with typical radiant tube values ranging from 12 inches to 60 inches depending on the installation. Always coordinate the final layout with the authority having jurisdiction, applicable codes, and the product specification documents.

CRC’s Omega II, Reflect-O-Ray, and Serengeti-IR radiant tube systems include a 10-year radiant tube warranty for internally created corrosion and a 3-year burner control warranty. Systems are factory tested, CSA certified, and built with corrosion-resistant aluminized steel tubing. Stainless Steel construction is available for corrosive environments such as natatoriums, wash bays, and chemical processing.