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FAQs about EAc1.3 :

If pursuing Option 2, what is the scope of the energy model if the space shares a central plant, and what type of software should be used?

For Option 1, Zoning and Controls, is a thermostat considered an “active control capable of sensing space demand"?

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CI-2009 EAc1.3:Optimize Energy Performance—HVAC

Active control modulating the HVAC system as per space demand

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Lavanya Veerappa
Ms
LEAD Consultancy & Engineering services
LEEDuser Basic Member
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Does that mean a dedicated VAV box hooked with any one of the following meets the requirement: 1. Thermostat control 2. Occupancy sensor 3. CO2 sensor If the answer for option 1 or 2 is yes, then how is it going to modulate HVAC system as per space demand ? because thermostat only senses the temperature and occupancy sensor will only shut off/on the VAV and pump in fresh air as designed. However it will not help in pumping more fresh air if the occupancy increases (I assume that is what the space demand is) I hope my interpretation is correct ?

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Tue, 02/12/2013 - 15:42

The Bird's Eye View FAQ section above summarizes Interpretations around this issue. Looks like just thermostats do not cut it.
Profile picture for user lavanya.veerappa
Lavanya Veerappa
Ms
LEAD Consultancy & Engineering services
LEEDuser Basic Member
5 thumbs up

Mon, 02/18/2013 - 06:41

When themrostat can meet the space demand by modulating the VAV is there any requriement for other any active control components like occupancy sensor ?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 02/18/2013 - 14:42

Suggest you read the interpretations mentioned above (10242 and 5273) then request clarification if necessary. I can't tell if your system meets the criteria outlined in the interpretations based on what you have provided.

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