09-08-1986 Council Packet - Laserfiche WebLink

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TERRA-THERM INC. GrGtl; Box 428 • New Richland. %IN 56072 Phone. 507-465.3213 T PA JOB NA14E: Mr. & tors. William Ulrich LOCATION: Orono, Minnesota To the best of my knowledge and ability the following information is made available for your review. The figures that I am presenting are estimates only. Actual performance and conditions may vary due to unpredictable circumstances. The equipment specified for this application is TETCO Ground Water Heating & Cooling Systems. The equipment is manufactured in Delaware, Ohio. TERRA -THERM Inc. is the Distributor for the above mentioned equipment. Utilizing information that we have compiled from previous applications. On an energy efficient designed home we have found that one unit can handle up to 5,000 sq. ft. of living area. We know, based on the above square footage that one unit would have a run time of approximately 2,000 hrs. each year. The Ulrich residence is approximately 30,000 sq. ft.. Under optimum design conditions we would need 6 units in'this home each running at 6,000 hrs. per year. The average water flow per unit would be 6 gpm. 1. With this information we can determine the amount o;: water to be utilized. 6 units x 2,000 hrs. x 60 min. x 6 gpm. = 4,320,000 gal. 4,320,000 gal. s 270 days(normal heating season) = 16,000 gal. 16,.000gal. j 24 hrs. = 666.67 gal. 666 gal. 60 min. = 11.10 gal. In this residence we find 12 different systems. Each system indeperidaritly zoned. The calculated Heat loss is 400,000 BTU's. I selected an average winter temperat re of 170 above zero and a worst weather temperature of -18� below zero. Using 170 above 00 the 12 zones would require 31 gpm, on an average. The average run time per unit would be 25 minutes out of an hour. Remember this will be staggered run time so all units will not be running at the same time. The average daily discharge at 170 above 00 would be 19,344.gal. per day, or tio6 gal. per hr., or 13 gal. per minute.