24 Jun '12, 7pm

Roof Sprinkler Cooling System < not to mention flame retardant

Attached are four scanned photos of my rooftop irrigation system. A repeat cycle timer plugged into a 24 hour InterMatic timer runs the system. The system cycles about three times an hour for about six minutes a cycle. The system runs from about 8am to about 8 PM during June, July, and August. Turning off the faucet and disconnecting the hose will drain down the system for winter. The sprinkler heads and solenoid valve came from Farmtec. I got the Encore repeat cycle timer on line, I had the weatherproof InterMatic timer. I drilled out the sprinkler heads to give a little more delivery. There is a minimal amount of runoff down the downspouts which greens up the buffalo and rescue grass. The repeat cycle timer and solenoid valve was the major cost component of the system. I have less than $150 in the system. Summer time electrical rates in NE are about $0.15/kWh (so much fo...

Full article: http://www.builditsolar.com/Experimental/RoofCooling.htm

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