Baseline HVAC System

Ciaran McCabe

Director

Passive Dynamics Sustainability Consultants

LEEDuser Basic Member

12 thumbs up

April 21, 2016

We are using packaged VAV with reheat system 5 for the Baseline System. In sizing the baseline heating coils and fans within this system should the air flow rates and and on coil / off coil temperatures match the proposed building system.?

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 04/25/2016 - 14:39

The airflow rates are auto-sized along with the heating capacity. See G3.1.2.2 for equipment capacities, G3.1.2.8 for airflow rate/temperatures, and G3.1.2.9 for fans. The room temperature settings should be identical to the proposed.

Ciaran McCabe

Director

Passive Dynamics Sustainability Consultants

LEEDuser Basic Member

12 thumbs up

Sun, 05/08/2016 - 20:31

Thanks Marcus. Just wondering should the Outside Air supply rate be the same for the proposed and baseline rooms modeled ?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 05/09/2016 - 13:25

Unless the proposed has demand controlled ventilation the total outside air should be in the same in both models. Since you do not necessarily create a model on a room-by-room basis I am not sure it translates down to the room level. A system #5 according to G3.1.1 must be modeled as a system per floor. So the OA for that system on that floor should correspond to the total outside air of the proposed systems serving that floor.