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Commercial solar ventilation
preheating and RTU screening

Space heating is a major use of energy in buildings nationwide. Recent data suggest that space heating accounts for about 42 percent of energy use in U.S. residences and about 36 percent of energy use in U.S. commercial buildings.

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Sunreps solar collector

Transpired solar collectors pre-heat ventilation air

Building heating costs and RTU run times are significantly lowered

Our collectors are made with American materials for the world's buildings

Why is Sunreps' solar screening so exceptional?

  • Installs on Most 2–10 Ton RTUs in Under an Hour: No electrical work or integration required. Uses the RTU fan and existing leaf guard supports.

  • Pre-Heats Ventilation Air: Delivers a minimum of 22% of annual heat energy savings (RETScreen.net validation).

  • Designed for the HVAC Sector: Ships in three pieces: collector, plenum, and ducting. No special tools required. Installs with the tools of the HVAC trade.

  • Performance is Measured — Not Promised: Certified to deliver 10 CFM per sq. ft. at 0.10” WC using NREL-developed airflow testing software.

  • Professional Training for HVAC Techs: Sunreps conducts Zoom training on how to test the efficiency of a transpired solar collector system. It requires only the instruments of the trade and a cellphone.

Sunreps solar collector

Our happy customers

Here's what a few of our happy clients have to say about the services we provide.

Rick Harris

Vice President of Asset Services - Transwestern

John Wabel and Sunreps are on the cutting edge of unique renewable energy products. Their solar collecting , which we utilized, not only met the requirements of screening our mechanical equipment for the city of Redmond; but it reduces energy costs in heating for our facilities.

Jason Gentemann

General Manager - Pacific Northwest at Foster Farms

I am confident that John Wabel’s work to create cost-effective, non-conductive transpired solar collectors will not only make a significant impact on the poultry industry, but on many other industries throughout the world.