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unitary vav system cost

asked 2016-02-22 02:33:23 -0500

Coolmint's avatar

updated 2017-04-16 11:19:16 -0500

Hi everyone, I'm using EnergyPlus. Using the same economics class list, why the VAV system's charge bigger than the unitary system's charge? Its just like not normal. Thanks.

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answered 2016-04-28 19:27:46 -0500

The VAV system cost, assuming a water-to-air system, is usually higher than comparable unitary air systems (air-to-air) due to water loop piping, pumps, chiller (compressor), and possibly cooling tower, first cost. These costs are partially offset by construction (less space needed for a water pipe versus an air duct) and fan energy (less duct work needed to move air). The economics for these systems is complex, even for VAV air-to-air (i.e., no water loops). Read available literature for more insight.

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Asked: 2016-02-22 02:33:23 -0500

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Last updated: Apr 28 '16