Installation Guide

1. The horizontal vent connector must slope upward toward the termination at least 1/4 inch per

foot and be installed so that all condensate runs back toward the appliance and is not retained in

any part of the venting system. EXCEPTION: If the system is connected to positive pressure

(Category III or IV) appliances only, terminates with a horizontal termination, and has no provision

for draining condensation and/or rain water; then the vent must pitch downward toward the

termination. This pitch must also be at least 1/4 inch per foot (2 degrees).

2. The vent system must terminate with one of the Saf-T Vent terminations or other terminations

as specified or provided by the appliance manufacturer, or approved mechanical vent devices.

3. The Termination Location:

(a) The vent shall terminate at least 3 feet above any forced air inlet located within 10 feet.

(b) The vent shall terminate at least 4 feet below, 4 feet horizontally from or 1 foot above

AND 2 feet horizontally from any door, window or gravity air inlet into any building. Exception:

Direct Vent appliances may be listed for alternate spacing.

snow accumulates, at least 12 inches above the anticipated snow line.

(d) Through-the-wall vents for Category II and IV appliances and noncategorized condensing

appliances shall not terminate over a public walkway or an area where condensate or vapors

could create a nuisance or hazard or could be detrimental to the operation of regulators, relief

valves or other equipment. In colder climates where ice buildup is likely to occur, Selkirk Corporation

will NOT be held liable for any personal injury or property damage due to any formation of ice.

(e) The vent termination shall also be at least 8 feet horizontally from any combustion air intake,

located above it.

(f) Horizontal supports are required for every 6 feet of horizontal run and after every transition

from vertical to horizontal.

4. The total continuous distance of the vent system from the appliance flue collar to the termination

shall not exceed that specified in the appliance manufacturer’s installation instructions. When

venting natural draft appliances the termination must be at least 5 feet above the topmost draft

hood. Otherwise a Listed mechanical draft inducing device is required.

Horizontal Installation Requirements: