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Ventilation Air From Outdoors

Provide extra fresh air by using ventilation grills or duct. You

must provide two permanent openings: one within 12 inches

of the ceiling and one within 12 inches of the oor. Connect

these items directly to the outdoors or spaces open to the

outdoors. These spaces include attics and crawl spaces.

Follow the National Fuel Gas Code NFPA 54/ANS Z223.1.

Air for Combustion and Ventilation for required size of

ventilation grills or ducts.

Ventilation Air From Inside Building

This fresh air would come from adjoining unconned space.

When ventilating to an adjoining unconned space, you must

provide two permanent openings: one within 12 inches of the

wall connecting the two spaces (see options 1 and 2, Fig. 2).

You can also remove door into adjoining room (see option

3, Fig. 2). Follow the National Fuel Gas Code NFPA 54/ANS

Z223.1. 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.

Rework worksheet, adding the space of the adjoining

unconned space. The combined spaces must have enough

fresh air to supply all appliances in both spaces.

Fig. 2 - Ventilation Air from Inside Building

Fig. 3 - Ventilation Air from Outdoors

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Procom EDP200T2-O Dokumentacja Strona 10