Chicago, IL - Construction Renovation of Building, Gold Coast Neighborhood

During the initial phases of construction, direct fired natural gas heating units are sometimes the general contractors heat of choice because of the heating output efficiency and rental cost. DF heaters cost considerably less than Indirect Fired Heaters. Open flame heaters are 100% efficient and can either operate off of propane or natural gas. Also, there are diesel direct fired heaters as well but less common and used in specific applications. Direct fired units need fresh air intake from the outdoors to avoid carbon monoxide and water vapor by products. When direct fired heaters are starved of oxygen, the flame will turn from blue to yellow and CO and water vapor are emitted. When you get a headache when around direct fired heaters, it is most likely a result of the lack of fresh air supplied to the heater. Direct fired heaters are the ticket when plenty of fresh air is available.