LEED for Healthcare requires the 'hospital rooms' adhere to the ventilation requirements of ASHRAE 170, and the non-hospital rooms adhere to ASHRAE 62.1.

FOR NC PROJECTS: The ventilation rates in the baseline model must be consistent with the ASHRAE 62.1 rates, and if additional outdoor air is provided then the proposed must include the as-designed ventilation rate.

I assume for HC projects the baseline vent rate of the energy model would match the more stringent standard ASHRAE 62.1 versus 170. and proposed would match the as-designed ventlation rate.

I ask because the 170 vent rate is quite a bit higher than the 62.1 vent rate and I believe we can use the 170 vent rate in the baseline energy model.

Thanks!

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Cory Duggin

Senior Energy Wizard

TLC Engineering Solutions

LEEDuser Premium Member

44 thumbs up

Thu, 04/10/2025 - 17:02

You are correct the baseline vent rate is the same as the worst case of 170 or 62.1, whichever applies to the space type. Typically, if it is a space type in ASHRAE 170 that will be the prevailing ventilation requirement. Just make sure to provide clear documentation of the ventilation calcs showing the which standard is being used for each space to come up with the Vot for the AHU.

Dave Hubka

Practice Leader - Sustainability

EUA

LEEDuser Expert

510 thumbs up

Thu, 04/10/2025 - 17:13

Thanks Cory!

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