Hoyme MAC – Terminating End Damper

HMI MAC Series – Replacement (make-up) Fresh Air Control Damper

MAC Installation Instructions – Printer Friendly (pdf)

CSA International Certified. Satisfaction guaranteed.

‘Terminating-end’ Type motorized damper to control Make-up, Replacement Air in Residential and Commercial buildings. Diameter from 4″ to 9″.

Features Include:

  • Simple installation, installs at TERMINATING end of Vertical or Horizontal Round Duct.
  • Durable, patented HOYME ‘Spring Motor Drive’ with Nylon Bearings.
  • Damper Plate is self cleaning and protected by an expanded metal basket.
  • Series MAC Dampers are spring return type and can be ordered Power Closed (PC) OR Power Open (PO). Similar in appearance to the Combustion Air Damper, Series ‘HOM’

Options Include:

  1. Relay and/or end switch to prove Damper being open or closed.
  2. Interface Relay Adaptors permit connection to Line Voltage controls.
    – An optional End Switch allows the MAC to prove its Open position

Series MAC is designed specifically for the control of cold fresh air into buildings, mechanical rooms and fruit rooms. The body is insulated and the Damper has a tight metal-to-metal seal that ensures dependable low temperature operation.

Passive Fresh Air Inlet Ducts are sometimes plugged and therefore become unsafe. Alternatively, 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.

General Damper Identification: i.e. MAC – 0610 – OPC:

SeriesDiameter (in)MotorsRelaysEnd SwitchPower Open/Closed
MAC06100PC

MAC Installation Instructions – Printer Friendly (pdf)

Colored Wire Diagrams with the MAC Series Dampers