Heat Loss Tabulation Forms

Manufacturers of heating equipment will often provide heat loss tabulation forms and instructions for their use. Lists of the most commonly used U-values (or factors) are included with the forms. Figures 4-4 and 4-5 show examples of these forms and instructions obtained from Amana Refrigeration, Inc.

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Ifl&idc Design Te? np._

подпись: ifl&idc design te?np._RESIDENTIAL HEAT LOSS TABULATION

Outside Design Temp._______________

Date_____________________________________________________

T«mp. Difference _________ _____ .

Computed By_____________________________________________ Temp. Difference +10._________________

Living Ream Dining Room Krl<H«n Bedroom 1 Bedroom 2 Bath Rooms

Btu

1. Room Siie (LxWxH) Totsfs

2. Linear Fl. Exp. Wflli

3. Floor Area

Ar. or Ar. or Ar. or Ar. or Ar. or Ar. or Ar. of Ar. or

Factor Ln. Ft. BTU lit — Ft. BTU Ln, Ft. BTU Ln. Ft. BTU Lr. Ft. BTU Ln. Ft. BTU In Ft. BTU In. Ft. BTU

4. Window»

5. Door»

6 Exp W*ll 7. Ceiling

8. Infiltration

9. SUB TOTALS

10, Sub-TotaMorT. br

11, Floor Btu for T. D.

12, Partition Qtu far T. D.

13, Room Total Btu Loss

Windows

U FacTon

Exp. Walls

U Factors

% Duct Loss Sthtdult

Single Pa«« …………………………………………

1

.13

Clapboard

Brick

Stem« 1 Story

1 Vt Story

2 Story

Double Pane, Sealed………………………………

.57

Frame Construction With:

Or Shingte

Venr

Ducts rnsul. 10

В

6

Sto/m Windows, Tight…………………………….

.45

No InvjtoMon

.25

.26

[2] Ouctt No Insul. 30

25

20

Storm Windows, Loose……………………………

.75

»i" ln*|. Board

.19

.21

.24

Glass Slack…………………………………………

.50

2" Intl. B*tts

.11

.12

.12

T. D. — — TEMPERATURE DIFFERENCE

3*fc" ln»l — Bdt:$

.09

.10

.10

Wood Do-on U F*cfor*

Ceilings

Infiltration (factor times lineal ft. of crack)

Nom. Thickness No Storm

Storm Door tVenf: Altie sPa<e

Abovt)

W«ather Stripped Not Weather Stripped

1" .69

.35

■ Nd fnsulalion..

-5 U

Double Hung Window {0) .22

.35

1 Vi’ 52

.30

4" Insulation. .

.09

Pivoting Window» (b) .30

.50

2" .46

,23

6′ Insulation

.05

Doors (cj 60

1.00

2Va" 38

.25

Fixed Window (dj.13

.13

CONCRETE FLOOR ON «ROUND

Btu Per Hr, Per Lineal Ft. of Ђdg«

Outside Design Temp. 25

20

15

JO 5 0-5

-10 —

-15 “20

-25

-30

L, r Vert. Insul. Extending

Down 10^ Below Surface 55

62

68

75 80 85 90

95

100 105

110

115

1 L Type Insul. Extending

12w Down and 12^ Under 50

57

63

70 75 BD B5

90

95 100

105

^0 Double Wood Ffoori

Or Partition

2 L Type Insul. Extending

12” Down and 2H Under 41? 45 50 55 60 65 70 75 BO 85 90 95

»Vi*h Air Spacc

Temp. D:ff.

No edge insulation and no heat in »lob

 

Facto.’ No Insu I.

 

Thij construction not recommended.

 

Factor 2" Insul.

 

Address…………………………………………………………………………………………………..

Installation by…………………………………………………………………………………………

Estimate by……………… .,…………………………………………………………. Date………

Model………………………………………….. *…………………… ; Size……………………..

………….. sq. ft.; Gross Inside Vofume………………………………………………………………..

Dry-Bi/lb Temperature (F)

Customer………..

Buyer………………………………

Estimate Number……………..

Equipment Selected…. Direction House Faces . Design Conditions:

Outside

 

Heat Loss Tabulation Forms

… cu. ft.

 

Gross Floor Area

 

AREA

(Sq. ft.)

Except ftem 4; Linear Ft.

 

FACTOR

(Circle the factors applicable.)

 

BTU/HR

(Area x Factor)

 

ITEM

 

DESIGN DRY-BUIB TEMPERATURE (F)

’10 0 10 20 25

 

30

 

35

 

-30

 

-20

 

I. WINDOWS

{total of afl windows)

Sing le-g last……………………………………………….

Double glass or glass block

………. 113

……….. 50

102

45

Ь. « a o

79

35

68

30

57

25

51

23

45

20

40

18

2. WALL5

No insulation (brick veneer,

Frame, stucco, masonry) ………………………….

……… 25

23

20

IB

15

13

11

10

9

1 in. insulation or % il» insulating sheathing….

……….. 20

18

16

14

12

10

9

8

7

2 in. or more insulation………………………………..

………. 10

9

0

7

6

5

5

4

4

3. ROOFS

Pitched or flat with vented air space and:

No insulation…………………………………………….

31

28

25

22

19

16

U

12

11

2 in. insulation…………………………………………..

10

9

8

7

6

5

5

4

4

4 in. insulation………………………………………….

………….. 7

6

6

5

4

4

3

3

7

Flat with no air space and:

No Insulation…………………………………………….

………….. 50

45

40

35

30

25

23

20

1 8

In. insulation………………………………………

25

23

20

18

15

13

11

10

9

1 Vn in. insulation…………………………………….

15

14

12

11

9

8

7

6

5

3 in. insulation…………………………………………..

10

9

8

7

6

5

5

4

4

4 FLOORS

Over—(sq. ft, area):

Basement………………………………………………..

0

0

0

0

0

0

0

0

0

Enclosed erawf space……………………………….

…………. 23

20

16

16

14

11

SO

9

8

Op? n crawl space……………………………………..

…….. 34

31

27

24

20

17

15

14

12

On ground—(linear feet):

No edge insulation

…….. 81

73

65

57

49

41

37

32

28

1 in. edge insulation………………………………….

………….. 6S

61

54

48

41

34

31

27

24

2 in. edge insulation………………………………….

55

50

44

39

33

28

25

22

19

5. OUTSIDE AfR

Total Floor4 A>ea (sq. ft.) …………………………..

14

13

1 1

10

E

7

6

6

5

6. TOTAL {Sum of 1 through 5}

Figure 4-5 Residential heating load estimate form. (CourtesyAmana Refrigeration, Inc.)

Posted in Audel HVAC Fundamentals Volume 1 Heating Systems, Furnaces, and Boilers