Gas fired duct furnaces are common in large commercial and industrial spaces. With models for both indoor and outdoor use available in gravity vented, power vented, and separated combustion designs, you have a wide range of choices to help you find the ideal solution for your facility. 

Search by part number if you know exactly what you're looking for. Otherwise, our customer care team can help you choose the gas fired duct heater that's right for your application. In general, gravity-vented units are designed to be used in your building's heating and cooling system with a natural draft, while power-vented units are a better option for horizontal vent systems or when you have negative pressure around the unit. Choose from natural gas and propane models in a range of sizes:

About Commercial and Industrial Gas Fired Duct Furnaces

Gas fired duct heaters by manufacturers like Sterling, Beacon Morris, and Modine range up to 400,000 Btu/h. These units offer exceptional thermal efficiency and reliable heating for the comfort and safety of your employees and equipment. These basic choices will help you narrow down your options:

  • 1 or 2 stage control

  • Indoor or outdoor installation

  • Natural gas or propane fuel source

  • Aluminized steel or stainless steel heat exchanger

  • Clam shell or tubular heat exchanger design

  • Left hand or right hand access

  • Gravity, power vented, separated combustion, or convertible venting

  • Btu/h ranging from 90,000 to 400,000

From there, you'll enjoy features like high limit switches, combustion air pressure switches, spark ignited intermittent pilot with flame supervision, quick and accurate field connections, and ETL certification for commercial and industrial use in the United States and Canada. Outdoor models are built for weather and corrosion resistance to ensure a long system lifespan, even in challenging conditions. These outdoor units cannot be placed inside. 

Each gas fired duct furnace is listed with required and optional accessories, including high-altitude conversion kits, thermostats, thermostat guards, stainless steel burners, horizontal or vertical vent adapter kits, factory installed fan time delay, and so much more, depending upon the model. Aluminized steel often comes standard, but it's recommended to upgrade to stainless steel heat exchangers if the entering air temperature in your application is below 40° F and/or your duct furnaces are located downstream from the cooling coils.

We list every unit with clear descriptions, availability and lead time, product literature (like installer's guides, product catalogs, and more), and low, factory-direct pricing. Your order will arrive via fast, free shipping in the lower 48 states, or you can choose an expedited shipping option at check out. If you're placing a high-volume order, please contact us in advance for special bulk pricing. 

Some gas fired duct heaters require a qualified installer; if so, you'll be asked to confirm that you are a qualified installer or that you will hire one before you make your purchase. This is another step we take to ensure the product is right for your application and help you avoid surprises and unnecessary delays. 

NorthStock is a leading HVAC distributor, and we're proud to partner with the industry's top manufacturers, including Beacon Morris, Modine, and Sterling. We're confident you'll find what you're looking for in our unparalleled inventory of gas fired duct heaters and other heating, cooling, and ventilation parts and products. Contact us to learn more about gas fired duct furnace solutions or to place your order today.