G115 Direct Vent Installation Instructions

The location of the wall terminations is one of the most important aspects of a direct-vent installation.

Both the intake and exhaust terminations must be located on the same outside wall in order to balance

wind pressure effects against the flow of exhaust gases. In addition, the wall terminations shall not be

installed on that side of the building exposed to the prevailing wind direction or in alcoves and exterior

building recesses where swirling wind conditions may occur.

IMPORTANT: Consult with local authorities to insure compliance with local building, plumbing and

electrical codes.

Guidelines For The Location Of The Exhaust Termination.

See Figure 2 for details.

1. The exhaust terminal must be located such that the products of combustion will be freely dispersed

outside without reentering the building. The exhaust gases shall not interfere with people, overheat

combustible materials, or enter adjacent buildings.

2. Exhaust terminal shall be at least 2 ft from an adjacent building.

3. The exhaust terminal shall be at least 7 ft above grade when above public walkways.

4. The exhaust terminal shall not be located underneath a porch or crawl space.

5. The exhaust terminal shall not be located less than 3 ft from an L-shaped inside building corner

and no less than 3 feet away from an outside corner.

6. The exhaust terminal shall be located at least 3 ft above any forced air inlet within 10 ft

horizontally.

7. The exhaust terminal shall not be less than 4 ft below, 1 ft above, or 4 ft horizontally from any

door, window or gravity air inlet into the building.

8. The exhaust terminal shall be at least 1 ft above grade and placed in such a location where the

exhaust terminal is not susceptible to blockage from debris, leaves or falling snow or ice from

roofs. A 1/2" wire-mesh screen at the exhaust terminal must be maintained in good working

order.

9. The exhaust terminal shall terminate more than 3 ft from any other building opening, oil tank vent

or oil tank fill inlet. (6 ft from any gas service regulator vent outlet).

Guidelines for the location of the intake air terminal:

1. The air intake must be placed on the same side of the building as

the exhaust to balance wind pressure effects.

2. The intake terminal must be at least 1 ft above maximum local

snow level. An outside air intake riser is permitted provided a

downturned intake terminal is used (Fig. 1).

3. The intake and exhaust terminals must be at least 4 ft apart when

using the Aerocowl exhaust termination. This minimum distance

can be reduced to 2 ft when the intake terminal is at least 1 ft

below the exhaust terminal.

4. The intake terminal shall be equipped and maintained with a 1/2"

wire mesh screen in good working order to prevent accidental

blockage from entry of foreign objects

1 Location of Wall Terminals

Fig. 1 Outside air intake

riser.