COZY C255H Manual Del Propietário página 10

FURNACE LOCATED IN UNCONFINED SPACE
An unconfined space must have a volume of a minimum 50 cubic
feet per 1,000 BTU/hr. of the total combined input of all appliances
in the area. Adjoining rooms may be included only if there are no
doors between the rooms or if special provisions are made such
as ventilation grilles installed between connecting rooms. Figure 4
outlines the minimum area in square feet, based on 8-foot ceiling
heights for various BTU/hr. input ratings.
FIGURE 4 - MINIMUM AREA
4,000 BTU/hr. per
square inch opening
Rectangular
Round duct dia.
square duct size
4" 3" x 3"
4" 3 x 3
4"
3" x 4"
4" 3" x 4"
4"
3" x 5"
4 1/2" 3" x 5"
* Can be two or more rooms separated by ventilation gas fire.
EXAMPLES OF GRILL PLACEMENT
VENTILATION GRILLES CONNECTING TWO
ROOMS TO MEET UNCONFINED SPACE
200 SQ IN
MINIMUM
BETWEEN
LARGE
ROOMS
RECOMMENDED FRESH AIR DUCT INTO CRAWL
SPACE IN FURNACE AREA OR IN CLOSET WITH
WATER HEATER
FURNACE LOCATED IN CONFINED SPACE
If a furnace is installed in a confined space, it must be provided
with free air for proper combustion and ventilation of flue gases by
one of the following methods:
A. AIR FROM INSIDE THE BUILDING
If the confined space adjoins an unconfined space, provide two
permanent openings. One within 12-inches of the top and another
within 12-inches of the bottom of the room directly connected to the
unconfined space. Each opening must have a free area of at least
100-square inches or 1-square inch per 1,000 BTU/hr. of input for
all appliances combined.
10
COZY TOP VENT GRAVITY GAS WALL HEATER
INSTALLING YOUR FURNACE
*Uncontained space
Max. min. area in sq. ft.
8" ceiling height
BTU/hr input
30,000 145
219
35,000
40,000 240
45,000 281
312
50,000
60,000 375
100 SQ IN
VENTILATION
GRILLES
INTO CLOSET
FOR HOT
WATER
HEATER
100 SQ IN
WARNING: Danger of property damage, bodily injury
or death. The adjoining unconfined space must have
adequate air infiltration.
B. AIR FROM OUTDOORS
If confined space does not adjoin an unconfined space, then air must
be provided from outdoors or spaces open to the outdoors such as
an attic or crawl spaces.
Openings for inlet or outlet air should NOT be made into an attic area
if the attic is equipped with a thermostat controlled power vent.
Provide two permanent openings, one within 12-inches of the top
and bottom of the room connecting directly to, or by using ducts, with
the outdoors or areas open to fresh air.
If the opening connects directly to, or with vertical ducts, the free area of
each opening must be at least 1-square inch per 4,000 BTU/hr. of the
combined input of all appliances in the area.
If horizontal ducts are used, the free area of each opening must be
at least 1-square inch per 2,000 BTU/hr. of the combined input of all
appliances in the area.
WARNING: Danger of illness, bodily injury or death. Draft
hood spillage, with unobstructed vents, indicates that
additional air must be brought into the structure from the
outside. Keep a window open (minimum 2-inches near the
appliance until a permanent air duct is installed.
EXAMPLES OF AIR INLETS AND OUTLETS
CHIMNEY OR GAS VENT
OUTLET AIR
OUTLET AIR
INLET AIR
INLET AIR
WARNING: Danger of illness, bodily injury or death. Draft
hood spillage, with unobstructed vents, indicates that
additional air must be brought into the structure from the
outside. Keep a window open (minimum 2-inches near the
appliance until a permanent air duct is installed.
VENTILATED
ATTIC
12
TO
ATTIC
100 SQ
INCHES
EACH
WALL
FURN
10 CRAWL
SPACE
MAX
12
VENTILATED
CRAWL SPACE