Collector Types


	SUNSIARAY, INC.


	THERE ARE THREE BASIC COLLECTOR DESIGNS TYPE #1: FRONT PASS TYPE #2: FRONT/BACK PASS COMBINATION [TRANSPIRED] AND TYPE #3: BACK PASS

	1: IN A FRONT PASS AIR MOVES BETWEEN THE GLASS AND ABSORBER PLATE AND IS COMMON IN BLACK PAINT AND SCREEN SYSTEMS.

	2: IN FRONT/BACK PASS [TRANSPIRED] THE AIR MOVES THROUGH THE HOLES IN THE ABSORBER PLATE LETTING AIR MOVE ON BOTH SIDES OF THE PLATE. THESE ARE NORMALLY BLACK PAINT OR SEMI-SELECTIVE PAINT.

	3: BACK PASS AIR MOVES BEHIND THE ABSORBER PLATE AND HAS A DEAD AIR SPACE BETWEEN THE ABSORBER PLATE AND THE GLASS. COATINGS RUN FORM BLACK PAINT UP-TO HIGHLY SELECTIVE COATING. AS IN NORTHERN COMFORT TM. COLLECTORS


	GLASS IS A VERY POOR INSULATOR Type #1: GLASS IS AT THE LOW END OF THE SCALE IN PERFORMANCE AND SHOULD NOT BE USED IN ANYTHING BUT MILD CLIMATES. Type #2: [NON TRANSPIRED] HAS BETTER PERFORMANCE BECAUSE NOT ALL OF THE AIR IS EXPOSED TO THE HEAT LOSS OF THE GLAZING. Type #3: HAS THE HIGHEST PERFORMANCE WITH THE DEAD AIR SPACE SERVING THE SAME PURPOSE AS A DOUBLE PANE WINDOW AND IS VERY EFFECTIVE IN AIR MAKEUP AND HEATING WITH VERY LITTLE HEAT LOSS THROUGH THE GLAZING.

	THREE TYPES OF GLAZING. #1: POLY-CARBONATE WILL YELLOW AND LOOSE TRANSMITTANCE OVER TIME. # 2: PLAIN GLASS - HIGH IRON CONTENT AND DANGEROUS IF BROKEN. #3: SOLAR GLASS -LOW IRON CONTENT [LIKE CRYSTAL] AND FULLY TEMPERED FOR SAFETY WITH THE HIGHEST TRANSMITTANCE AVAILABLE.