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United States Stove Company HOTBLAST 1950 User Manual

Page 18

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9.

DUCTS AND DAMPERS DIMENSIONS (EXAM

P

LES OF CALCULATI

ON)

SIMPLIFIED METHOD

DISTRIBUTION SYSTEM

Du

ct

s si

ze

(h

eat

)

4 inch o

utlet

redu

ce by 1

5 inch o

utlet

redu

ce by 2

Always by 8”

thick

6 inch o

utlet

redu

ce by 3

N.B.: Th

e main duct must be reduce

d

ev

er

y 2 outlets.

Ducts specifications (heat)

Dimension

s

Length

Elbow

Average

equivalen

ce

4”

10’

1

x

90

o

Max 4,000 Btu

5”

10’

1

x

90

o

Max 6,000 Btu

6”

10’

1

x

90

o

Max 7,000 Btu

DAMPER

For a 4

” wa

rm air outlet: 2” x 10” damp

er

For a 5

” wa

rm air outlet: 2” x 12” damp

er or 4

” x 10”

For a 6

” wa

rm air outlet: 2” x 14” damp

er or 4

” x 12”

WARM AIR SYST

EM INSTALL

A

TION

HO

USE DIM

E

NSIONS

Example: 28 x 40 bungal

ow: 1,120 sq. ft.

28 x 40 x 8: 8

,960 cu. ft. x

1.8 Ch. air/hr:

16,128 Btu

Exposed w

al

ls:

40 + 40

+ 28

+ 28: 136 x 8: 1,088 cu. ft.

x 22:

23,936 Btu

Number o

f

w

indo

w

s:

12 of 3 x 4: 1

44 x 60:

8,640 Btu

Number o

f d

oors:

2 x 3 x 7: 42 x 100:

4,200 Btu

52,904 Btu

Non

-insulate

d basemen

t:

25%

Insulated b

asement:

1

5%

7,906 Btu

or 54 Btu pe

r sq. ft.

60,840 Btu

TO BE ADDE

D:

Hou

se 1 1/2

floor = 25%

Hou

se 2 floo

rs = 40%

BEDRO

OM (f

or exampl

e: 12 x 12)

12 x 12 x 8: 1

,152 cu. ft. x

1.8 Ch. air/hr:

2,074 Btu

Exposed w

al

ls:

12 + 12 x 8: 192 x 22:

4,224 Btu

Windo

w

s:

3 x 4 x 60

720 Btu

7,018

Btu

17