Greetings,
The project we are modeling follows LEDD v3 - 2007 (System 7) and the heating source is purchased heat. There are two question related to this issue.
1. Is there some interpretation or other amendments clearing how much will be the pump power, because it is written (G3.1.3.5) "….(except for purchased water or steam)…".
2. The allowed pump power in W/gpm is it per all heating water system or it could be split somehow (as per floor area)
Your advice will be highly appreciated.
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
May 29, 2017 - 4:26 pm
You can model it identical to the proposed pumps, since 90.1-2007 does not say how to model them.
You can also apply Addendum ai which would have you model them at 14 W/gpm. It is all primary pump and is not split.
Bob Crowell
Vice President / Principal2rw Consultants, Inc.
1 thumbs up
June 21, 2017 - 2:57 pm
Hey Marcus,
Applying Addendum ai does not give me any direction on whether or not these pumps should be variable speed.
Any ideas if whether or not it is based on square footage?
Thanks
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
June 21, 2017 - 3:54 pm
If you go back to G3.1.3.5 I think it is variable over 120,000 sf and riding the curve if under.