42929-2-0721
Page 2
Empire Comfort Systems Inc. • Belleville, IL
CAUTION
Due to sharp edges and the weight of the assembly,
please use proper eye protection and gloves to reduce
the potential for injuries.
TOOLS/SUPPLIES NEEDED FOR HMFA:
• Phillips Screwdriver
• Electric Drill
• Flathead Screwdriver
• 5/16", 3/8" Nut Drivers
• Metal Snips
• Utility Knife
• Flex Vent Kit
SDGDFA25
Other miscellaneous tools commonly used for framing & wiring.
HMFA INTRODUCTION
The Forced Air Heat Management system (HMFA) is
designed to be installed in conjunction with specific Empire
Comfort Systems Fireplaces, to reduce the amount of heat
produced during operation of the fireplace. This system
includes a variable speed controlled blower that will deliver
a desired percentage of the heat produced by the fireplace
to the exterior of the building.
CONTENTS OF HMFA:
1. Blower w/Base Assembly (1 ea.)
2. Outer Termination Assembly (1 ea.)
3. 6" Diameter Collar w/Flange (2 ea.)
4. 6" X 6" X 6" “Y” Duct Connector (1 ea.)
5. 6" Diameter Adapter (“Y” to Flex Connection) (1 ea.)
6. Band Clamp (4 ea.)
7. Rheostat (Variable Speed Control) w/Knob (1 ea.)
8. Junction Box w/Cover (1 ea.)
9. Hardware Pack (1 ea.)
NOTE:
Flex venting is not included with HMFA kit. Please
order the SD6DFA25 Flex Vent Kit which includes 25' of Flex
Vent and (2) Band clamps to complete the system installation.
MAKE-UP AIR REQUIREMENT FOR HMFA
When in operation, the HMFA Forced Air Heat Management
System will deliver a percentage of heated air from the
fireplace to the exterior of the building. Because a certain
amount of air will be removed from the building, it must be
replaced with fresh make-up air, to prevent negative pressure
from building up inside the structure.
Some central furnaces include make-up air dampers. If
a make-up air damper is included with the furnace, check
the damper for proper function and operation. There are
variations in central furnace make-up dampers, therefore,
you must check to see if the existing system is compatible.
Some systems are designed to operate if a negative pressure
is detected inside the building.
Other systems are designed to operate only while the central
furnace blower is operating, and would therefore require an
additional make-up air damper system be installed.
Make-up Air Dampers are available at local HVAC supply
stores or contractors. The Make-up Air Damper shall be sized
based on the potential amount of cubic air to be expelled.
The HMFA system has the potential of expelling 150 CFM.
If installing a Make-up Air Damper, it is recommended that it
be installed at the opposite end of the building. In addition,
installation of the damper at a high level of a vaulted ceiling
will help dilute the incoming cold air with the warmer air
normally found near the ceiling.
WARNING
HMFA Blower MUST be mounted on an exterior wall.
DO NOT transfer heat to an interior space.
HMFA FORCED AIR HEAT MANAGEMENT SYSTEM
