Date
Inquiry
The V&S Guidelines indicate that the Green Rater should verify "calculation of total effective length (TEL) for the longest supply and return duct run." What if the TEL is embedded within the software, or the HVAC contractor uses a different method for calculating friction or pressure drop across the ductwork?
Ruling
If the TEL cannot be verified, it\'s acceptable to verify an equivalent calculation for the friction coeffecient or pressure drop over the ductwork. TEL is one way to estimate pressure drop over ductwork, but there are other methods.
Internationally Applicable
Off
Campus Applicable
Off