Car Park Ventilation

Ciaran McCabe

Director

Passive Dynamics Sustainability Consultants

LEEDuser Basic Member

12 thumbs up

August 28, 2017

In relation to car park ventilation that will only operate in the event of high carbon monoxide i.e under normal circumstances will be off. How should this be modeled in accordance with ASHRAE 90.1 - 2007.

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 08/28/2017 - 14:35

See LEED Interpretation 10371.

Ciaran McCabe

Director

Passive Dynamics Sustainability Consultants

LEEDuser Basic Member

12 thumbs up

Tue, 09/05/2017 - 15:40

Thanks Marcus. This appears to be a tricky one. Its not easy for us to estimate with certainty the number for hours the garage fans will operate as this is based on contaminant levels in the space. There is many factors including volume and type of cars. In actual fact I think they will only run very seldom if ever as the car park is also open to outside. With this in mind I wonder if these fans should be included in the model at all ?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 09/05/2017 - 16:04

They need to be included. Estimate the hours with peaks and valleys as best you can and include a narrative justification for your schedule and the baseline if claiming savings. Make sure to use the same on/off schedule for the baseline too. If you can demonstrate that they will never come on then you don't have to model them. This might be as much or more effort however.