Commercial heat pump hot water

Tom Nelson

Architect

Lionakis

LEEDuser Basic Member

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April 16, 2019

Has anyone used a commercial heat pump water heater for a large protect? I have found a few manufacturers for this technology, but want to make sure this is a viable and cost approach to electrical eliminate gas on a path to all electric.

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Stet Sanborn

SmithGroup

LEEDuser Premium Member

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Wed, 04/17/2019 - 16:27

For large central domestic hot water heat pumps, I would recommend looking at Colmac. Is the project residential or non-res? For all folks looking to transition to heat pumps for domestic hot water production, make sure your engineers are getting full performance curves from the manufacturers for your design day conditions. Air-source heat pumps have reduced efficiency at low outside air temperatures and their capacity falls as well. If this is taken into account when sizing units, then they work great. If not, you’re likely to end up with insufficient capacity and iced-over condensers. STET SANBORN AIA NCARB CPHC LEED AP Principal | Engineering Discipline Lead ________________________________ SmithGroup 301 Battery Street, 7th Floor San Francisco, CA 94111 C 415.516.7946 T 415.343.2032 stet.sanborn@smithgroup.com smithgroup.com Connect with us LinkedIn | Facebook | Twitter | Instagram _________________________________ F

Jacob Knowles

Director of Sustainable Design

BR+A

LEEDuser Basic Member

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Wed, 04/17/2019 - 17:04

Similar to Stet Sanborn, I also recommend Colmac for water-source (ground source) heat pumps to generate domestic hot water. We are using this approach on a large healthcare project in Massachusetts.