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ISTD Duct Furnace

ISTD Series - 80% Efficient Indirect Fired Duct Furnace for Firing Natural Gas or Propane

The Hastings “ISTD” indirect gas fired duct furnace high efficiency tubular design heat exchanger has a wide range of MBH inputs from 100 MBH to 400 MBH with an output efficiency rating of 80% with selected airflows required to meet selected application.  Hastings “ISTD” duct furnace design will have turn down capabilities of 4:1 up to 12:1 based on project specifications.


- Space Heating
- Make-Up Air
- Heating and Ventilation

Fuels:  Natural Gas or Propane Gas
100,000 - 400,000
823 - 9872
Floor or Suspended
Location -
Service Manual

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