Solar Water Heating Systems

AET offers pre-designed completed systems for both residential and commercial applications. Our residential systems are marketed under the EagleSun System brand and the commercial systems are marketed under the EagleSun Pro Line.

AET Solar water heating solutions can be designed effectively to provide for 70%-90% of commercial water heating needs. These commercial systems provide hot water for domestic use, space heating and pre-heats to boilers. All our systems come with back up heating capabilities. Solar Water Heating Systems are very effective in facilities such as hospitals, dorms, hotels and nursing facilities where they experience constant hot water demands. In addition, schools, commercial offices and restaurants with intermittent water heating loads reap substantial benefits.

AET’s extensive experience in the solar thermal market has proven that the Drainback systems are the lowest maintenance and highest performing design. As such, AET promotes this type of design whenever applicable. However, understanding that all applications will not accommodate a Drainback system AET offers the following EagleSun System designs.

	Open Loop / Direct Systems Benefits: Most efficient according to FSEC Low roof loading Incorporates limited freeze protection strategy Considerations: Subject to utility black outs during peak cold spells Damage from harsh water Freeze Protection sometimes fail Direct Pressurized Design


	Indirect Glycol Systems Benefits: Positive freeze protection Low roof load Widely used and known by contractors Considerations: Lower efficiencies Higher cost Glycol degradation Increased maintenance Indirect Pressurized Glycol Design


	Drainback Systems Benefits: More efficient than glycol Low roof load Positive freeze and overheat protection Panels last longer Fewer problematic components Considerations: Sloping of the collector and piping array Larger pipe diameter & pump DBS – Drainback Design


	Drainback Systems Benefits: More efficient than glycol Low roof load Positive freeze and overheat protection Panels last longer Fewer problematic components Considerations: Sloping of the collector and piping array Larger pipe diameter & pump DX – Drainback Design



	Drainback Systems Benefits: More efficient than glycol Low roof load Positive freeze and overheat protection Panels last longer Fewer problematic components Considerations: Sloping of the collector and piping array Larger pipe diameter & pump DB – Drainback Design


	Thermosiphon Systems Benefits: No pumps Simple to install Considerations: Minimal freeze protection High static roof loading Thermosiphon / Free Flow Design