TZ91DH - 90% Downflow/Horizontal Gas Furnace 


The Thermal Zone® 90% Downflow/Horizontal is a value-alternative which enjoys the benefits of high-efficiency at lower cost. 

  • Integrated Furnace Control
    Integrated control board manages all operational functions and provides accessory hook-ups for an electronic air cleaner.
  • Draft Inducer
    Quietly provides air for combustion while venting the products of combustion from the heat exchanger outdoors.
  • Hot Surface Ignition & Remote Sensor
    The hot surface ignition is an efficient method of gas ignition while the remote sensor monitors the flame.
  • In-Shot Burners
    Regulates the air/gas mixture.
  • Blower Motor
    An easy slide out blower motor for easy access. The blower quietly circulates air around the heat exchanger, where it is heated to comfortably warm your home.
  • Primary & Secondary Exchanger
    Provides reliable and efficient comfort to your home by delivering heat quickly and evenly by extracting additional heat which is lost by less efficient furnaces
  • Easily Converted from downflow to horizontal 
  • Limited Warranty
    Twenty year heat exchanger limited warranty.  All other parts have a five year limited warranty
C UL US Listed  gama Member  CSA Design Certified
90% AFUE
TZ91DH Gas Furnace
Heating Capacities from 45,000 to 120,000 BTU/HR