UEi EagleX Especificaciones descargar pdf (Pagina 11)

1 . 8 0 0 . 5 4 7 . 5 7 4 0 • W W W . U E i T E S T . C O M

R

ESIDEN T IA L

S

OURCES OF

CO

1. Chimney

2. Space He a t e r s

3. Vehicle exhaust

4. Water He a t e r

5. Fu r n a c e

6. Un p r operly vented appliances

7. Tobacco pro d u c t s

8. Fi r eplace (Gas or wood burning)

9. & 10. Gas appliances

S

TACK

E

FFEC T

& N

EGAT I VE

P

RES SURE

Stack Effect

When air escapes thro u g h

openings in the upper part of a

building and is replaced with outside

air entering through vents or cracks

l o wer down. As air warms it expands

and becomes less dense than the

s u r r ounding air, it rises and escapes

t h r ough small gaps at the top of the

house. This also draws fresh cold air

t h r ough similar gaps or vents at the

bottom of the house. The va c u u m

c r eated by escaping warm air is called

the stack effect. When carefully

c o n t r olled, stack effect can produce a

l o w and effective level of natural

ventilation.

Negative Pre s s u re

A tightly sealed house will

indicate a reduction of draft when

venting equipment (clothes drye r,

kitchen hood, bathroom vent) is

turned on during a draft test. If the

air pre s s u r e outside is greater than the

p r e s s u r e within the house, a

vacuum, or negative pre s s u r e is

c r eated. This difference in air pre s s u r e

will pull air through any ava i l a b l e

openings in building walls, ceilings,

floors, doors, windows, and air

c i r culation systems. If this vacuum is

s t r ong enough it can re v erse exhaust

ventilation systems pulling harmful

gases in to the house.

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