"Ensure adequate water treatment: Scale and sludge deposits reduce flow and impair heat transfer. An ongoing water-treatment program is critical to efficient equipment operation throughout the distribution system. "
References
ASHRAE Handbook, HVAC Systems and Equipment, 2000
US Department of Energy, Improving Pumping System Performance, Second Edition, May 2006 www1.eere.energy.gov/industry/bestpractices/pdfs/pump.pdf
Harold R. Colen, PE, HVAC Systems Evaluation, 1990
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