[Bldg-sim] ASHRAE 90.1 2013 Baseline Envelope for Existing buildings

[Madhav Munshi via Bldg-sim]

Hello everyone,

We are working on multiple existing building renovations in NY which will be filed after October 2016 and therefore will have to comply with the state amended version of ASHRAE 90.1-2013. Most of these designs have upgraded envelope, glazing and some of these also have an increase in glazing area. I wanted to know how to treat this increase in glazing - should I model it in the Baseline or should the Baseline have the same WWR as the existing building. I have created an example table below to clarify further. Could anyone comment if I should be using Alt 1 or Alt 2?


DESIGN

MODELS



Existing Building

Proposed Design

Proposed Model

ASHRAE 90.1-2013 Baseline ALT 1

ASHRAE 90.1-2013 Baseline ALT 2

Roofs

Existing un-insulated roof

New roof, fully insulated

New roof, fully insulated

Fully insulated roof as per table 5.5

Fully insulated roof as per table 5.5


Walls

Uninsulated masonry walls

Add rigid insulation

Masonry wall plus rigid insulation

Steel framed walls as per table 5.5

Steel framed walls as per table 5.5


Glazing

Single pane glazing

Double pane within same opening cavity

Double pane within same opening cavity

Metal framed all other as per table 5.5

Metal framed all other as per table 5.5


New curtain wall

New curtain wall

Metal curtain wall as per table 5.5

No [No increase in fenestration area]


WWR

30%

35%

35%

35%

30%


Glazing distribution

as per design

as per Proposed Design

as per Existing building


Any guidance is much appreciated.

Thank you

Madhav

[cid:image001.png at 01CA94FC.558724B0]

MADHAV MUNSHI | BEMP, LEED AP BD+C

Kohler Ronan, LLC | www.kohlerronan.com<http://www.kohlerronan.com/>
mmunshi at kohlerronan.com<mailto:mmunshi at kohlerronan.com>


171 Madison Avenue, New York, NY 10016
212.695.2422  F 212.695.2423

93 Lake Avenue, Danbury, CT 06810
203.778.1017  F 203.778.1018

[MEP2014]
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