Direct Fired Make-Up Air Unit
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SBD Model - 100% Fresh Air Application
SBDR Model - Up to 80% Return Air Capacity
SBDF Model - Duct Furnace
LU - Series Directflow
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SBD Direct Fired Make Up Air Unit
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Operation
In a direct fired make-up air unit, the air that is to be heated is passed directly over an open flame. No heat exchanger is involved. This design results in an extremely efficient system that achieves 100% combustion efficiency and a 92% overall thermal efficiency (with 8% of the total heat lost in the latent heat of water formed in combustion). The combustion is so complete that any remaining combustion products are well within code prescribed safety limits. Because of these benefits, direct fired units are ideal for make-up air or heating and ventilating applications.
SBD Series Make-up Air Unit
Product Specifications
Fuels: Natural or LP Gas
Btu/Hr: 87,000-10,000,000 Output
SCFM: 2,000-120,000
Firing: Direct
Mounting: Floor or Suspended, Vertical/Horizontal
Location: Indoor or Outdoor
Bulletin:  SBDR-SBD-1
Service Manual: SSB-1 SERVICE MANUAL .pdf
Configurations: 100% Fresh Air, VAV (Variable Air Volume), 80/20, 50/50
Cooling: DX or CW (Chill Water) Coil Sections Available
Note: Chiller Packages available for split DX systems.
Approvals: ETL
LU Series Make-up Air Unit
Product Specifications
Fuels: Natural or LP Gas
Btu/Hr: 117,000-2,113,000 Output
SCFM: 2,000-20,000
Firing: Direct
Mounting: Floor or Suspended, Vertical/Horizontal
Location: Indoor or Outdoor
Bulletin: LU-1
Service Manual: LU-1 Service Manual (Scanned).pdf
Approvals: ETL
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