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NC-2009 EAp2:Minimum Energy Performance

Zoning

“USER’S MANUAL TO ANSI/ASHRAE/IESNA STANDARD 90.1-2007” says: “An HVAC zone is physically determined by the design of the HVAC system. It includes some number of thermodynamically similar spaces whose loads can be satisfied through use of a single thermostat (or other type of temperature control)”. Does “whose loads can be satisfied through use of a single thermostat” mean that the temperatures and the thermal loads and gains of all the spaces which compose a HVAC zone have to be similar? How much “similar”? In the dynamic model can I consider 2 rooms in which there are two different thermostats but which have very similar internal temperatures and thermal loads and gains as part of the same zone? Best Regards

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Chilufya Lombe
Sustainability Consultant
Solid Green Consulting
LEEDuser Basic Member
23 thumbs up

Mon, 07/02/2012 - 15:31

Hi, I think as long as you meet the requirements for thermal block zoning (which are detailed in the manual) you can merge spaces with similar loads.

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