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A building has fan-assisted ventilation and no mechanical cooling system. Does this qualify as natural ventilation?

What options are available to mechanically ventilated projects outside the U.S. to meet this prerequisite?

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NC-v4 EQp1:Minimum indoor air quality performance

Single supply system

Does anyone know a definition for "single supply system". I've looked it up in ASHRAE 62.1 and ASHRAE's Manual and I wasn't able to find it.

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Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Fri, 02/12/2016 - 16:24

Gustavo, can you provide more context to the question? I'm not sure about a single supply system.

Fri, 02/12/2016 - 18:27

It is not about a specific project. When doing a ventilation calculator I was wondering in which cases I should select this option.
Profile picture for user bstanley
Ben Stanley
Senior Sustainability Manager
WSP - Built Ecology
LEEDuser Expert
188 thumbs up

Tue, 02/16/2016 - 23:24

I see. The ASHRAE 62.1 2007 user manual has a definition of sorts. See example 6-I if you have access to that. Here's a shorthand for how the single zone system is defined there. A (single) zone requires that each space within the zone have similar occupant and building outdoor air rates, similar occupant density, and similar zone primary airflow rates.

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