[Equest-users] Multi-Family Corridor Baseline

Thu Jun 9 20:17:19 PDT 2016

The current version of EPA MFHR simulation guidelines is found at the link below, and requires modeling corridors, stairwells, etc. in multifamily buildings with baseline Systems 1/2 irrespective of their total area. 

https://www.energystar.gov/ia/partners/bldrs_lenders_raters/downloads/mfhr/ENERGY%20STAR%20MFHR%20Simulation%20Guidelines_Version_1%200_Rev03.pdf?ca60-bf37 Here are some related abstracts. 

DEFINITIONS 

common space: any spaces within a building that serves a function in support of the residential part of the building that is not part of a dwelling unit. This includes spaces used by residents, such as corridors, stairs, lobbies, laundry rooms, exercise rooms, residential recreation rooms, parking used exclusively by residents, building staff, and their guests. This also includes offices used by building management, administration or maintenance and all special use areas located in the building to serve and support the residents such as day-care facilities, gyms, dining halls, etc.

nonresidential: spaces in mixed-use buildings other than residential or common space, such as commercial space.

residential: spaces in buildings used primarily for living and sleeping. Residential spaces include, but are not limited to, dwelling units. 

3. MODELING GUIDELINES

…………………..

3.8.2 The Baseline and Proposed HVAC system shall be modeled as per Appendix G, and as clarified in the first note below Appendix G Table G3.1.1A, “…Residential building types include dormitory, hotel, motel, and multifamily.” Following this note, common spaces that are essential to the building’s residential function, including but not limited to corridors and stairwells, must be modeled with residential baseline HVAC system type (System 1 or 2 only) depending on the predominant fuel source in the building, except as allowed in 3.8.1. 

Appendix G exception G3.1.1(a) that allows the use of additional system types for non-predominant conditions if they total more than 20,000 ft2 only applies to heating source, not space function. Baseline HVAC System Types 3-8 may not be used, except in appropriate nonresidential spaces that exceed 20,000 ft2. 

-- 

Maria Karpman LEED AP, BEMP, CEM

________________

Karpman Consulting

 <http://www.karpmanconsulting.net/> www.karpmanconsulting.net 

Phone 860.430.1909 

41C New London Turnpike

Glastonbury, CT 06033

From: Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Elizabeth Gillmor via Equest-users
Sent: Thursday, June 09, 2016 9:25 PM
To: Sunayana Jain
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Multi-Family Corridor Baseline

In my experience LEED will accept a second baseline system type for the corridors, but then following appendix G, you would use a System type 7.  I would take the same interpretation for MFHR.  

You could probably make a case to do all residential systems, but with gas heating in the corridor, that would put you in a System Type 1 throughout, which would unnecessarily punish your dwelling units.

Cheers,

Elizabeth

Elizabeth Gillmor  PE, BEMP, LC, LEED AP

e n e r g e t i c s  consulting engineers, llc

energetics-eng.com | 303.619.0091

On Thu, Jun 9, 2016 at 1:41 PM, Sunayana Jain via Equest-users <equest-users at lists.onebuilding.org> wrote:

I have 10 floors multi-family building. Units are served by packaged terminal heat pumps and corridors are pressurized and are served by RTUs (MAUs) with gas heat. Units are naturally ventilated. Total corridor area is greater than 20,000 SF.

I wanted to know if residential systems (System 1 or System 2) should be applied for the corridors in the baseline as recommended by Multi-Family High Rise (MFHR) guideline? Would LEED also accept residential systems for corridors instead of non-residential systems?

I have seen this discussion in the past but was curious to know the latest take on it.

Thanks,

Sunayana

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