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2319 Laurelbrook Street, Raleigh, NC 27604 · (800) 542-7221 · FAX (919) 834-4526 · www.ultimate-products.com
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A. 8 VENT REQUIREMENTS AND DETAILS (CONT.)
Flue joints should be sealed using RTV high temperature sealant and secured
using at least three (3) sheet metal screws. Should condensation occur flue
should be shortened or insulated.
The terminal must exit the building at least 7 ft. above any area accessible to
the public.
The terminal must be at least 3ft. away from any air intake to the building.
If the heater is equipped with ducted combustion air, the terminal must be at
least 3 ft. away from the air inlet and located higher than the inlet.
The vent terminal must be protected from blockage by snow.
A.9 FRESH AIR DUCTED INTAKE
Whenever the heater is installed in locations where air born dust or other polluted
atmosphere is present; a fresh air supply should be ducted to the burner.
A heater modified for fresh air intake should be specified when ordering. This
model is modified with a 4-inch diameter duct connection at the burner.
A fresh air duct of 4-inch diameter should be installed from the fresh air to the air
intake connection on the burner housing. A flexible jointing piece should be
installed at the burner connection with hose clamps to facilitate the disconnection
when servicing the burner assembly.
The maximum recommended length of fresh air duct is 25 feet and the
maximum number of bends is two (2). The minimum length is 18 inches. The
location of the fresh air duct inlet must be where it will receive dust free clean air.
An Ultimate Products inlet cap with bird screen must be fitted at the inlet of the
duct. If the duct inlet is located above the roof the underside of the inlet terminal
must be at least 2 ft. above roof level and at least 10 inches above any projection
on the roof within 7 ft. of the inlet.
See Appendix ‘A’ for typical installation drawing and Ultimate Products part
numbers. Intake pipe, fittings, and sealant are not furnished by Manufacturer.