NSF announces new geothermal certification

摘要

Ann arbor, mich. — Nsf International's Plumbing Program recently introduced a new geothermal listing for piping products that will ultimately produce cost-effective and environmentally-friendly methods to heat and cool buildings.rnAccording to the U.S. Environmental Protection Agency, geothermal systems average 40% greater efficiency than air-source heat pumps, 48% better than natural gas furnaces and 75% better than oil furnaces.