Design Considerations

Design Considerations

Prior to starting your installation, we suggest you take the following into consideration:

1. There are two possible ways to connect a direct vent venting system to a gas appliance:

- The horizontal installation (through the wall);

- The vertical installation (through the roof).

Check the appliance manufacturer's installation instructions to see all possible vent configurations.

2. Review all your options for the appliance location and also venting configuration. Try to minimize the alteration and reframing of structural components of the building (wall studs, water pipes, electrical wiring, ceiling joists, roof rafters, etc.). It may be easier to change the location of your appliance than to modify the building structure.

3. Carefully read the appliance and the venting system instruction manuals. Good planning might save you time, work and money.

4. Use only authorized EXCELDirect® listed components unless compatibility with another brand is specified in the appliance manufacturer’s instructions. Do not use damaged parts.

5. For a horizontal installation, you will have to take into consideration the distance between the gas appliance adapter to the wall, as well as the wall thickness and a vertical rise (if applicable). The horizontal vent termination on the exterior must be located in accordance with the Installation Codes and Regulations.

6. For a vertical installation, you must consider the distance between the gas appliance outlet and the ceiling, the ceiling thickness, the height of the attic or second floor and allow sufficient vent height above roof line.

7. For two-story applications, firestops are required at each floor. If an offset is needed in the attic, additional lengths and elbows will be required.

8. Contact your local building authority and/or fire officials for permits, restrictions and installation inspections. You may also wish to contact your house insurance representative.