Is there any special considerations for a project registered (v2.2) and designed 10 years ago is now being constructed. V2.2 and v2009 have expired so we need to register it for v4. However,...

In response to the ASHRAE 90.1:2007 mandatory requirements for the efficiency of 60Hz motors, some had used the European IE2 standard for 50Hz motors and demonstrated equivalency. The ASHRAE 90....

Does anyone have a link to a concise list of the differences between 90.1-2007 and 90.1-2010?

Thank you USGBC for Energy Performance Calculator. I remember the days before...where you had to make your own more or less whilst fumbling through projects. I've not tested this, but it looks...

In a Jurisdiction where code is surpassing ASHRAE 90.1-2010 LEED buildings are required (by code) to meet the more stringent requirements but measure their energy score based improvement from...

Hello!

I am constructing a building model which spaces are half offices, half laboratories.
The HVAC system chosen is system 5 (packaged...

Has anyone used Pre-Conditioned Air to support energy savings or IN credit compliance?

What guidelines should be used for district thermal energy systems in v4 when using option 1, specifically...

Hi, I am QA'ing a model for a building that will be fed via a cogeneration plant (with absorption chillers) and therefore is a little complicated. The cogen plant is owned by the utility (which...

I have a HVAC system with labs on it requiring 100% outside air systems. Following all the guidance in 90.1 these spaces require a dedicated Sys 5/7 because they are over 5,000 cfm. Also my...