Hello to all,
I have following questions concerning ASHRAE 90.1.2010 and unmet hours:
- The proposed building according to G3.1.2.3 shall not exceed the 300 unmet hours. The 50 h between the proposed and the baseline is removed from 2010. Is there any other restriction concerning unmet hours between the proposed and the baseline?
- In Chapter 11 of ASHRAE 90.1.2010 in 11.3.2 at i is mentioned “The unmet hours for the proposed building shall not exceed the unmet hours for the budget building”. What is meant by “budget building” ? Does chapter 11 concern us when building our energy model?
- Must the Proposed building have the same thermostat throttling range with the baseline building? According Table F-1 it must be the same.
Thank you very much
Ricardo Sá
Director of SustainabilityEdifícios Saudáveis Consultores (503 910 767)
85 thumbs up
October 18, 2018 - 9:28 am
Please see section G.3.1.2.3 of ASHRAE 90.1-2010, where requirements associated with unmet load hours are exposed (300 unmet load hours per year are still allowed).
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
October 18, 2018 - 10:10 am
1. No
2. Budget building and baseline building are the same idea. Section 11 is the performance path for code compliance and is not used for demonstrating LEED compliance. So it does not apply to LEED projects.
3. Yes