HMI HOM Series 
- Fresh Air Damper for Combustion Air Control - 

 VIDEO - Click here to view 
Shell Busey and Cliff Hoyme explain the HOM Damper in a video from our archives. 
 

HOM Series dampers automatically control fresh air for combustion in residential and commercial buildings. Sizes range from 4" to 9" diameters in increments of 1". For larger commercial sizes, several dampers are mounted in tandem with end switches connected in series. May be used for retrofit and new installations.

Passive fresh air inlet ducts waste energy, are sometimes plugged and therefore become unsafe. Alternatively, HMI HOYME Motorized Dampers are safe as there is no need to plug the duct. The result is added comfort, added safety and a saving in energy costs.

Series HOM dampers are connected to the appliance transformer and are power closed. When the appliance fires, the damper drops open by gravity and does not interfere with appliance transformer.


CSA International Certified. Satisfaction guaranteed.

Typical Installations


          
< Residential Installation>         <Commercial Installation>

Features Include:

• Simple to install, attaches to the terminating end of insulated air supply duct.
• Interlocks with the safety control system of gas, propane and oil fired appliances which guarantees the damper to be open before the fire starts.
• Certified as required by National Gas Codes; fail-safe open, power closed.
• Durable, patented HMI  'spring motor drive' with nylon bearings.
• Standard connection to 24Vac thermo/aqua-stat circuits plus, with the use of 'Interface Relay Adaptors' , damper is compatible with MilliVolt DC and 120 Vac safety control systems.

Options Include:

1. Additional Relay and end-proving-switch to control two appliances (SF2).
2. Interface Relay Adaptors to provide interlocking connection to Millivolt DC and Line Voltage AC controls for commercial buildings. 
3. TEST/RUN switch (Standard equipment) to automatically disconnect circuits for testing damper and appliance operation.
 

General Damper Identification: i.e HOM-0511-SF1

HOM Installation Instructions - Printer Friendly(pdf)

  Colored Wire Diagrams used with the HOM Series Dampers

1.   Combustion air damper
2.   Combustion air damper for two furnaces
2A.   Combustion air damper for two furnaces and a replacement air damper
3.   Combustion air damper and replacement air damper
5.  120VAC vent switch, combustion air, and replacement air
5A.120VAC vent switch, combustion air and replacement air(2 furnaces)
5B.120VAC vent switch, combustion air(2 furnaces), replacement air
5C. 120 Vac two double pole vent switches with two exhaust fans , combustion air and replacement air
7.   24VAC vent switch, combustion air, and replacement air
7A. 24Vac vent switch, combustion air, and replacement air with two exhaust fans and two individual timers
7A1. 24Vac vent switch, combustion air, and replacement air with two exhaust fans and two individual timers Power open
9.   Timer, vent switch, combustion air, and replacement air
11. Vent switch, combustion air, and interlocking replacement air