FMI CCL3018PTA/NTA Manual Do Utilizador

www.fmiproducts.com

124971-01C

Unusually tight construction is defined

as construction where:

a. walls and ceilings exposed to the out-

side atmosphere have a continuous

water vapor retarder with a rating of one

perm (6x10

-11

kg per pa-sec-m

) or less

with openings gasketed or sealed and

b. weather stripping has been added on

openable windows and doors and

c. caulking or sealants are applied to

areas such as joints around window

and door frames, between sole plates

and floors, between wall-ceiling joints,

between wall panels, at penetrations

for plumbing, electrical and gas lines

and at other openings.

If your home meets all of the three criteria

above, you must provide additional fresh air.

See Ventilation Air From Outdoors, page 8.
If your home does not meet all of the three

criteria above, proceed to Determining Fresh-

Air Flow for Heater Location.
Confined and Unconfined Space

National Fuel Gas Code, ANSI Z223.1/NFPA

54 defines a confined space as a space whose

volume is less than 50 cubic feet per 1,000 Btu/

hr (4.8 m

per kw) of the aggregate input rating

of all appliances installed in that space and an

unconfined space as a space whose volume

is not less than 50 cubic feet per 1,000 Btu/hr

(4.8 m

per kw) of the aggregate input rating of

all appliances installed in that space. Rooms

communicating directly with the space in which

the appliances are installed*, through openings

not furnished with doors, are considered a part

of the unconfined space.
* Adjoining rooms are communicating only if

there are doorless passageways or ventilation

grills between them.

DETERMINING FRESH-AIR FLOW

FOR HEATER LOCATION

Determining if You Have a Confined or

Unconfined Space

Use this work sheet to determine if you have

a confined or unconfined space.

Space: Includes the room in which you will install

fireplace plus any adjoining rooms with door-

less passageways or ventilation grills between

the rooms.
1. Determine the volume of the space (length

x width x height).

Length x Width x Height =__________cu. ft.

(volume of space)

AIR FOR COMBUSTION AND VENTILATION

WARNING: This heater shall

not be installed in a room or space

unless the required volume of

indoor combustion air is provided

by the method described in the

National Fuel Gas Code, ANSI

Z223.1/NFPA 54, the International

Fuel Gas Code, or applicable

local codes. Read the following

instructions to insure proper fresh

air for this and other fuel-burning

appliances in your home.

Today’s homes are built more energy efficient

than ever. New materials, increased insulation

and new construction methods help reduce

heat loss in homes. Home owners weather

strip and caulk around windows and doors

to keep the cold air out and the warm air in.

During heating months, home owners want

their homes as airtight as possible.
While it is good to make your home energy

efficient, your home needs to breathe. Fresh

air must enter your home. All fuel-burning ap-

pliances need fresh air for proper combustion

and ventilation.
Exhaust fans, fireplaces, clothes dryers and

fuel burning appliances draw air from the house

to operate. You must provide adequate fresh

air for these appliances. This will insure proper

venting of vented fuel-burning appliances.

PROVIDING ADEQUATE

VENTILATION

The following are excerpts from National Fuel

Gas Code, ANSI Z223.1/NFPA 54, Air for

Combustion and Ventilation.
All spaces in homes fall into one of the three

following ventilation classifications:
1.  Unusually Tight Construction
2.  Unconfined Space
3.  Confined Space
The information on pages 6 through 8 will help

you classify your space and provide adequate

ventilation.
Unusually Tight Construction

The air that leaks around doors and windows

may provide enough fresh air for combustion

and ventilation. However, in buildings of un-

usually tight construction, you must provide

additional fresh air.