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Interior Lighting for residential dwelling units #776

Open GoogleCodeExporter opened 9 years ago

GoogleCodeExporter commented 9 years ago 
What 90.1 PRM Section(s) are relevant to this issue?
3.4.3 Interior Lighting Power Allowance

Explanation of issue:
This section and Appendix 3.4A doesn't appear to explicitly indicate the LPA 
for (residential) dwelling units. More fundamentally, what would be the correct 
SpaceFunction for a dwelling unit, i.e. an apartment in a multifamily or mixed 
use building?

Proposed resolution:

Original issue reported on code.google.com by da...@360-analytics.com on 11 Sep 2014 at 3:48

GoogleCodeExporter commented 9 years ago 
1. Dwelling units are exempt from 90.1 2010 lighting requirements, when using 
the space-by-space method. LPD for dwelling units = proposed building.
2. space function for dwelling unit would be an apartment in a multi-family 
building.
I will attach an updated Appendix 3.4A to issue 777. 

Added sections to PRM document-
Under 9.4.3 Interior Lighting : Non Regulated Interior Lighting Power-
In accordance to 90.1 2010, section 9.1.1 lighting requirements are applicable 
to
-   interior spaces of buildings
-   exterior building features, including facades, illuminated roofs, 
architectural features, entrances, exits, loading docks, and illuminated 
canopies
-   exterior building grounds lighting provided through the building’s 
electrical service
Exceptions:
1.  emergency lighting that is automatically off during normal building operation
2.  lighting within dwelling units
3.  lighting that is specifically designated as required by a health or life 
safety statute, ordinance, or regulation
4.  decorative gas lighting systems

Original comment by supriyag...@gmail.com on 16 Sep 2014 at 6:14

GoogleCodeExporter commented 9 years ago 
How does a user specify a 'Mixed use' building SpaceFunction? I do not see that 
in the NACM SpaceFunction list.

Original comment by supriyag...@gmail.com on 16 Sep 2014 at 6:15

GoogleCodeExporter commented 9 years ago 
No, currently CBECC does not support the T24 'Complete Building Method', which 
is analogous to 90.1 'Building Area Method'.

I would suggest not using 'Apartment' as the SpaceFunction for this 
application, as it may be confusing for people doing 'Condominium' or other 
ownership/leasing arrangements.  

How about 'Multifamily Unit' or 'Residential Unit'?  'Dwelling Unit' would be 
OK, I think, if it was assumed to also include sleeping units, which are 
defined in the IBC, but not in 90.1.

Original comment by da...@360-analytics.com on 16 Sep 2014 at 6:23

GoogleCodeExporter commented 9 years ago 
Ok- i understand that part now.

I believe we addressed the space function discussion under Issue 777.

Original comment by supriyag...@gmail.com on 16 Sep 2014 at 6:48