Direct Fired Process Air Heater Types: Duct Style, Gun Style and Packaged


Used in processes that require a hot air source, Direct Fired Air Heaters are ideal for applications that are not sensitive to the by-products of combustion. As their name implies, Direct Fired Process Air Heaters apply heat directly to the product air stream. These process heaters are used in heat treating, drying, curing, mining, printing and many other industries.

For over 60 years, Stelter & Brinck has been designing, manufacturing and providing service for 3 types of direct fired air heaters. They are outlined below:

Duct Style Air Heaters

Stelter & Brinck’s Duct Heater Models:

Fresh Air Duct Section Heater – uses the oxygen present in the air stream

Recirculating Duct Section Air Heaters- used for dirty air streams; features a combustion blower

Unique Duct Style Process Air Heater Feature:

Designed to fit into the processes’ duct work.

Duct Air Heater Applications:

Baking, curing, heat treating, oilfields, drying, and many more.

Picture of Stelter & Brinck Duct Air Heater:

Duct Air Heater- Stelter & Brinck- Fresh Air Duct Section

Gun Style Air Heaters

Stelter & Brinck’s Duct Heater Models:

Gas Only, Single or Multi-Pass

Oil Only, Single or Multi-Pass

Combination Gas and Oil Fired, Single or Multi-Pass

Unique Duct Style Process Air Heater Feature:

Gun Style Direct-Fired Heaters are ideal for low oxygen content streams or dirty air steams, which require larger mass flows and/or higher temperature, and/or fuel oil operation.

Gun Style Heater Applications:

Smoldering, metal curing, annealing, glass curing, ect.

Picture of S&B Stainless Steel Gun Style Air Heater:

Stelter & Brinck Gun Style Air Heater

Packaged Air Heaters

Stelter & Brinck’s Packaged Direct-Fired Heater Models:

Natural Gas Fired

Propane Fired

Butane Fired

Unique Packaged Process Air Heater Feature:

Packaged with all combustion parts and controls and totally prepiped and prewired; arrives on-site ready to be installed.

Packaged Heater Applications:

Dye and paint manufacturing, molds processing, ect.

Picture of Stelter & Brinck Packaged Air Heater:

Packaged Air Heater- Stelter & Brinck

Low emission air heater models and stainless steel construction are available for each unit by Stelter & Brinck. For more information on our direct fired air heaters, please visit our website: