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NC-2009 IEQc1:Outdoor Air Delivery Monitoring

Hotel Guest Villas Need OA measurement device?

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John Covello
Senior Sustainability Manager
UL Solutions
LEEDuser Premium Member
7 thumbs up

Hello, I am with a hotel project that will have 80 odd guest villas. Most will be between 90 M2 (968 sq ft) and 130 M2 (1400 sq ft) in size. There will be three main rooms (bedroom, dressing room, and living room) with fan coil units in each varying in capacity from 570 to 680 cfm. We expect 50 to 60% occupancy with an average of two guests per villa. The villas seem to fall under the definition non-densely occupied spaces.So my interpretation of the credit and diagram above is the units will require OA measurement devices. Does this sound correct?

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Rudolph Carneiro
HVAC consultant
Optimized Systems
LEEDuser Basic Member
19 thumbs up

Mon, 11/11/2013 - 11:02

Yes, it definitely falls under the requirement of OA measurement. There is a doubt I had with this particular configuration. If the system is variable, i.e., you have variable outside air to the building with ducted outside air to each room with a main OA supply on the Roof. (Which would save you a whole lot on your utility bills). Will you have to vary the setpoint of measurement automatically? In other words, if half of your rooms are occupied in the morning, and in the afternoon you have 25% occupancy, and you plan on shutting off outside air to those unoccupied rooms to save on energy costs, will you have to vary the minimum measurement to set off the visual or audible alert automatically?
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David Eldridge
Energy Efficiency Ninja
Grumman/Butkus Associates
LEEDuser Premium Member
64 thumbs up

Mon, 11/11/2013 - 18:37

Are you submitting the villas for ASHRAE 62.1 compliance as mechanically ventilated or as naturally ventilated?

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