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DUCT REQUIREMENTS
Ducting Requirements
• The gas appliance and flue system must be
vented directly to the outside of the building,
and never be attached to a chimney serving a
separate solid fuel or gas-burning appliance.
Each direct vent gas appliance must use its own
separate flue system.
• In addition to the requirements listed here, follow
the requirements provided with the vent.
Ducting Clearances
• The vent must maintain the required clearance
to combustible materials to prevent a fire. Do not
fill air spaces with insulation.
• Minimum Vent Configurations (elbow directly off
fireplace)
• The flue should have a minimum of a 4 ft.
straight run.
• Clearances are in accordance with local installa
-
tion codes and requirements of the gas supplier.
Minimum Clearance Above Flue
2”
Minimum Clearance to Sides & Below Flue
2”
Ducting Firestop
• A firestop is required whenever the vent pen
-
etrates a wall, floor, or ceiling (passes through
framing members)
Approved Ducting
• Acucraft provides ICC Excel Factory Built duct
-
ing. Further installation instructions can be
found at: www.icc-rsf.com. These units are
approved to use UL103HT ducting.
• Note: If ducting is not purchased from Acucraft,
no Flue anchor plate will be mounted to the unit.
You will need to purchase and mount the anchor
plate for the ducting that you are purchasing.
Ducting Installation
•
Slide the duct sections together, use screws pro-
vided with flue (3 screws at each joint).
•
No silicone is required
• Wall supports are required at a minimum of every
8 feet.
B-Vent Heat Relief
The heat relief needs to be certified B vent. Venting
maximum run follows the same guidelines as the flue.
For all other installation requirements refer to manu
-
facturer recommendations.
INSTALLATION GUIDE
The Intake runs are approved for up to 50 feet with an quantity
of 4, 90 degree elbows. This is not the case with all instances.
You must have venting scenario approved by Acucraft Fireplace
Systems.
The Flue and Heat-relief runs is approved for up to 100 feet with
a quantity of 2, 90 Degree Elbows. A quantity of 4 elbows are
approved for runs of 50 feet or less.
You must have your venting scenario approved by Acucraft Fire
-
place Systems
BL_ST_INSTL_RevB_4.08.19
