Hygrade Components - Screen Components

Comparisons
Warm Edge Spacers

Spacer	Gauge	Total Window U-Value (48" x 48")	% Above Aluminum	Frame U-Valve	% Above Aluminum	Coldest Glass Temperature	% Above Aluminum	Glass Temperature 1/2" from sightline	% Above Aluminum
Super Spacer®	N/A	.48	4.0%	.42	19.2%	43.4	27.3%	44.0	12.0%
HY-THERM™	N/A	.48	4.0%	.43	17.3%	42.3	24.0%	43.5	10.7%
Swiggle	N/A	.49	2.0%	.48	8.3%	38.6	13.2%	41.6	5.9%
Intercept™	N/A	.49	2.0%	.48	8.3%	37.8	10.9%	41.2	4.8%
Stainless Steel	.010	.49	2.0%	.48	8.3%	38.2	12.0%	41.3	5.1%
HY-NZ™	.012	.49	2.0%	.48	8.3%	37.6	10.3%	41.1	4.6%
Galv. Steel	.012	.50	0.0%	.51	0.0%	35.2	3.2%	39.8	1.3%
Aluminum	.013	.50	-	.52	-	34.1	-	39.3	-

Testing Method:

All of the spacer systems above were tested by Architectural Testing, Inc. (ATI) on July 14, 1998. ATI conducted a computer model thermal analysis of each spacer system using Window 4.1 computer software developed by Lawrence Berkeley Laboratory and Frame 4.0 developed by Enermodal Engineering Limited. Simulations were conducted to determine an interior surface temperature and U-valve when modeled in a generic wood frame. Each spacer system was modeled in 7/8" overall i.g. with 3/16" clear glass separated by a 1/2" spacer. A generic wood from 1 1/2" high by 3 1/4" wide was simulated with the spacer systems above. Each spacer was simulated 1/16" below the sightline with butyl sealant for single seal spacers and PIB and butyl for dual seal spacers.

Simulations were conducted at conditions for NFRC 100-97 and general guidelines were followed. It should be noted that frame and sash design will vary the differences made by spacer changes significantly. Typically greater changes are shown with vinyl products and little change may show with aluminum products and wood construction typically would fall in middle. Complete test results are available.