![EQUIPMENT IN CONFINED SPACE](/images/new-backgrounds/52023/5202313x1.webp)
EQUIPMENT IN CONFINED SPACE
ALL AIR FROM OUTSIDE
(Inlet Air from Crawlspace and Outlet Air to Ventilated Attic)
CHIMNEY OR
GAS VENT
VENTILATION LOUVERS
(Each end of attic)
| OUTLET |
|
FURNACE | AIR | WATER |
|
| HEATER |
VENTILATION |
| INLET |
| AIR | |
LOUVERS |
| |
|
| |
(For unheated crawl space) |
|
|
FIGURE 3
EQUIPMENT IN CONFINED SPACE |
ALL AIR FROM OUTSIDE |
EQUIPMENT IN
CONFINED SPACE
ALL AIR FROM
CHIMNEY | (All Air Through Ventilated Attic) |
OR GAS |
|
VENT |
|
CHIMNEY
OR GAS
OUTSIDE
VENTILATION LOUVERS |
(Each end of attic) |
OUTLET
AIR
FURNACE | INLET AIR |
| |
| (Ends 12 in. |
| above bottom) |
| WATER |
| HEATER |
VENT WATER
HEATER
OUTLET AIR
FURNACE |
INLET AIR |
NOTE - Each air duct opening shall have a free area of at least one square inch (645 mm2) per 2,000 Btu (.59 kW) per hour of the total input rating of all equipment in the enclosure. If the equipment room is located against an outside wall and the air openings communi cate directly with the outdoors, each opening shall have a free area of at least one square inch (645 mm2) per 4,000 Btu (1.17 kW) per hour of the total input rating of all other equipment in the enclosure.
FIGURE 4 | FIGURE 5 |
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