Desa VTD-24P-BTB Air For Combustion And Ventilation, Continued, Ventilation Air from Outdoors

6

AIR FOR COMBUSTION AND VENTILATION Ventilation Air (Cont.)

AIR FOR COMBUSTION AND VENTILATION

Continued

the outdoors or spaces open to the outdoors. These spaces include attics and crawl spaces. Follow the National Fuel Gas Code, ANSI Z223.1/NFPA 54, Section 5.3, Air for Combustion and Ventilation for required size of ventilation grills or ducts.

IMPORTANT: Do not provide openings for inlet or outlet air into attic if attic has a thermostat-controlled power vent. Heated air entering the attic will activate the power vent.

Ventilated

Outlet Attic

Air

Outlet
Air	To Attic

To

Crawl

Space

Inlet

Air

Ventilation

Grills

Into Adjoining

12"

Ventilation Grills Into Adjoining Room,

Inlet Air	Ventilated
	Crawl Space

Figure 3 - Ventilation Air from Outdoors

Room,

Or

Option 2

Option 1

Remove

Door into Adjoining Room, Option 3

12"

Figure 2 - Ventilation Air from Inside Building

For more information, visit www.desatech.com

111826-02F