InDirect Fired Heater Rental

Indirect fired propane, natural gas, or diesel fired heaters for rent are ideal for construction sites, industrial facilities, or any enclosed area with little outdoor air infiltration. With an indirect fired heater, the air is not in direct contact with the flame, therefore 100% clean, safe, forced air heat is provided. Indirect fired heaters are less efficient than direct fired heat since the contaminated byproducts of the flame are discharged outdoors through the flue pipe in the form of heat. The recirculated heated air and combustion gas flame air are in separate enclosed chambers or heat exchangers, providing clean safe heated air to the surroundings, similar to the furnace in your home.

When indirect fired heaters are installed indoors, the flue pipe needs to be hard piped outdoors. If the indirect fired heater rental unit is placed outdoors, the clean heated air can be ducted in and out of the area being heated. Common applications include retail spaces, construction sites, hospitals, universities, industrial facilities, chemical production plants, residential homes, or any location where 100% clean, safe heat is required.

Indirect fired heaters for rentals or rental purposes are available in a variety of fuel types including natural gas, diesel, and propane, and they range in sizes from 170,000 Btu’s through 2 million Btu's/Hr.

Last Projects Near Me?

If you’re looking for recent heating rental projects in the Chicago area, we’ve been busy supporting a wide range of applications using indirect fired heaters powered by natural gas, diesel, or propane. These systems have become essential in environments that require 100% clean, safe, and efficient heat—especially during harsh Midwest winters.

In Elmhurst, IL, we addressed a unique outdoor dining tent heating challenge using a natural gas indirect fired heater. A custom wood panel replaced a glass section to fit one 16" return and two 12" supply ducts. After connecting power, gas, and a thermostat, four high-temp ducts distributed warm air evenly inside the tent. The custom solution met the restaurant owner’s expectations. Porta Air specializes in creative, temporary heating rental solutions for demanding spaces.

In Glen Ellyn, IL, indirect fired heaters were used for an outdoor tent event during early spring. A site visit in DuPage County helped determine heater size, gas supply, duct length, flue safety, and power needs before installation. When natural gas isn’t available, propane or diesel fuel options are offered, though they may increase costs.

From new building sites to industrial retrofits, our heating rental solutions ensure that every project gets the safe, reliable heat it needs—no matter the size or scope. Whether you're managing a construction site in the suburbs or a critical facility downtown, we're equipped with a full line of indirect fired heater rentals and expert support across the Chicago region.