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.
SO
Os
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. |
|
|
||
|
|
||
Address………………………………………………………………………………………………….. Installation by………………………………………………………………………………………… Estimate by……………… .,…………………………………………………………. Date……… Model………………………………………….. *…………………… ; Size…………………….. ………….. sq. ft.; Gross Inside Vofume……………………………………………………………….. |
Dry-Bi/lb Temperature (F) |
|
![]() |
||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|||
|
|
||
|
|
||
I. WINDOWS {total of afl windows)
|
3. ROOFS Pitched or flat with vented air space and:
|
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