The single pane 4 mm solar glass is patterned to reduce reflection and is tempered to maximize strength and durability. The low iron oxide content of 0.03% enables a high solar transmittance of 91%. The absorber plate consists of copper fins ultrasonically welded to copper risers, this provides excellent heat transfer between the fins and risers, ensuring high efficiency. The absorber plate is coated with a German engineered blue sputtered coating, the most efficient absorber coating without exception. The absorption rate is 95% with extremely low extremely low emissivity of 5%. 1/2" copper risers are brazed to 1” copper manifolds for optimal flow distribution. SOLARHOT collectors have 11 risers - that’s 10% more risers than other leading flatplate collectors.  The black aluminum extrusion casing looks attractive on a roof. The unique design does not have any obtrusive bolts or screws. The all-around EPDM gasket is highly resistant to temperature variations and UV radiation. The gasket absorbs the differential expansion of the frames and glazing.  We spray polyurethane foam insulation into the cavity eliminating any issues with air infiltration. On top of the polyurethane we add a layer of mineral wool for extra insulation to further lock in the heat. Attached to the insulation, an aluminum foil radiant barrier also acts as a barrier against out-gassing.  The aluminum back plate is lightweight, long lasting and corrosion resistant.

Platinum Collector Spec Sheet