Project Info

Project Title 
Adding VFD to Fractional Horsepower Hot Water Recirculators
Project Number 
Investor Owned Utilities 
Water Heating
Commercial, Public, Residential
Project Year(s) 
2012 - 2013

Project Summary

Retrofit by adding VFD controller to fractional horsepower Hot Water Recirculator in single loop domestic use for apartments and hotels, etc. can save gas 15.6% with a compensating but modest increase in hot water usage of 13.4%; or an average gas savings of about 27 therms per apartment unit per year.  A loop in an apartment complex typically services 40 dwelling units.

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