“When we budgeted this facility four years ago, we figured a 30 percent savings related to those curtains,” Kowalczyk said. “With the biomass boiler we installed, we saved 75-80 percent, but that percentage is only realized because of the curtains.”
The energy curtain is also used as a black-out cloth for flowering early season garden mums.
Kowalczyk said the system’s shade curtain is a necessity in a naturally ventilated greenhouse.
“If I was in a glass greenhouse that didn’t have curtains then I would be either white washing the glass or placing some type of shade cloth over the structure to reduce light levels to keep from scorching the plants, especially during a summer like we had this year.
“The benefit of having the curtain is it’s opening and closing based on the natural light level. If I have a string of cloudy days, I’ve got the curtain open allowing in as much light as is available. I couldn’t do that with white wash or permanent shade cloth.”