Duda Solar 20 Tube Solar Water Heater Collector with 37° Frame & Evacuated Vacuum Tubes - SRCC Certified for Residential & Commercial Use | Perfect for Off-Grid Homes, Pool Heating & RV Applications

Duda Solar Water Heater Collectors are the most efficient solar collectors on the market. The evacuated tubes retain heat much better than flat panel collectors and therefore can work much more efficiently in cold climates. They also have a unique capability of obtaining higher efficiencies while the sun is at an angle in the east or west through passive tracking in the tubes. SRCC Certified and eligible for the 30% Federal Tax Rebate. May also be used with Duda Solar Aluminum Reflectors.

Hailstone Resistance up to φmm (1"), Max Operating Pressure 87psi, Max Flow Rate 5.25 gpm

14mm TU1 Copper Heat Pipes, Manifold insulation 45mm 93 Kg/m^3 Rockwool, Rated Best Heat Retention

φ58mm x 1800mm Three-Target Cu/SS-ALN(H)/SS-ALN(L)/ALN Vacuum Tubes, High Boron Silicon 3.3 Glass

Sun Absorption Efficiency 93-96%, Vacuum Rating Less than 5.0 x 10^3 Pa, Lifespan70% @ 15 Years

OG-100 SRCC Certificate Number 10001878, Eligible for 30% Federal Tax Rebate, Winter Resistant