Our state energy code is based on ASHRAE 90.1-2004, which I believe does not require ci for exterior walls. ASHRAE 90.1-2007 requires R-3.8 ci for nonresidential walls. The project architect...

In the proposed design, we are using a water-to-water heat pump for the sole purpose of service water heating. Voltage and Amps are 460v and 140 RLA, respectively. It is coupled with an unfired...

in or register to post comments Marcus Sheffer LEED Fellow 7group / Energy Opportunities LEEDuser Expert 5916 thumbs up March 29, 2012- 3:01 pm NC since this the forum for EAp2 that it was posted under. In general...

Does anybody know if electric fire pumps are exempted from energy efficiency requirements?
That is, from ASHRAE 90.1 section 10.4 minimum efficiency requirements for electrical motors....

We are modeling a classroom building. The building is 55% renovated, and 45% new construction. We are renovating the major HVAC systems, exterior envelope, and...

Hi, everyone, If there is a project with demand charge, how should we deal with the rule of 25% process cost.
Assume one building annual cost like below:
total demand cost（by $/kw）=1...

In Table 5.3 point 5 of annex G of ASHRAE 90.1-2007 I find that for the baseline building performance “opaque assemblies used for new buildings (..) shall confirm with the following common...

Does the Architect Signatory have to be a LEED AP? or just a registered Architect?

Dear all,
Sorry in advance for this lengthy thread. In a current (European) project the certifying building will be supplied with district heat from a large city network. We use option 2...

This question relates to the thread below (“Absorption chiller in baseline model”) but is of more general nature. The district heating system uses waste and...