ASTM-C1340:2004 Edition

$58.50

C1340-04 Standard Practice for Estimation of Heat Gain or Loss Through Ceilings Under Attics Containing Radiant Barriers by Use of a Computer Program

Published By	Publication Date	Number of Pages
ASTM	2004	21

Guaranteed Safe Checkout

Categories: 91.120.10 - Thermal insulation of buildings, ASTM

If you have any questions, feel free to reach out to our online customer service team by clicking on the bottom right corner. We’re here to assist you 24/7.
Email:[email protected]

Description

ASTM C1340-04

Historical Standard: Standard Practice for Estimation of Heat Gain or Loss Through Ceilings Under Attics Containing Radiant Barriers by Use of a Computer Program

ASTM C1340

Scope

1.1 This practice covers the estimation of heat gain or loss through ceilings under attics containing radiant barriers by use of a computer program. The computer program included as an adjunct to this practice provides a calculational procedure for estimating the heat loss or gain through the ceiling under an attic containing a truss or rafter mounted radiant barrier. The program also is applicable to the estimation of heat loss or gain through ceilings under an attic without a radiant barrier. This procedure utilizes hour-by-hour weather data to estimate the hour-by-hour ceiling heat flows. The interior of the house below the ceiling is assumed to be maintained at a constant temperature. At present, the procedure is applicable to sloped-roof attics with rectangular floor plans having an unshaded gabled roof and a horizontal ceiling. It is not applicable to structures with flat roofs, vaulted ceilings, or cathedral ceilings. The calculational accuracy also is limited by the quality of physical property data for the construction materials, principally the insulation and the radiant barrier, and by the quality of the weather data.

1.2 Under some circumstances, interactions between radiant barriers and HVAC ducts in attics can have a significant effect on the thermal performance of a building. Ducts are included in an extension of the computer model given in the appendix.

1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

Keywords

attic radiant barrier system; computer program; heat gain; heat loss

ICS Code

ICS Number Code 91.120.10 (Thermal insulation of buildings)

DOI: 10.1520/C1340-04

PDF Catalog

PDF Pages	PDF Title
1	Scope Referenced Documents Terminology Summary of Practice
2	Significance and Use Method of Calculation FIG. 1
4	TABLE 1
8	Computer Program
9	FIG. 2
10	Example Calculation Report FIG. 3 TABLE 2 TABLE 3
11	Precision and Bias FIG. 4 TABLE 4
12	FIG. 5
13	Keywords FIG. 5 TABLE 5
14	FIG. 6
15	X1. COMPUTER PROGRAM WITH QUASI-STEADY MODEL FOR HVAC DUCTS IN ATTICS X1.1 Supply Ducts FIG. 7
16	X1.2 Return Ducts
17	X1.3 Radiation View Factors X1.4 Convection Heat Transfer Coefficients X1.5 Computer Program with Ducts TABLE X1.1
18	TABLE X1.3
19	TABLE X1.4
20	X1.6 Precision and Bias FIG. X1.1
21	REFERENCES

Additional information

Standard Title	C1340-04 Standard Practice for Estimation of Heat Gain or Loss Through Ceilings Under Attics Containing Radiant Barriers by Use of a Computer Program
Published Code	ASTM
Publication Date	2004
Pages Count	21
ICS Codes	91.120.10 - Thermal insulation of buildings