Dear All, I am modeling an existing building with a Water-cooled VRF HVAC system.

I have a heating-only warehouse (with small conditioned office) I'm modeling for C&S 2009.

How do I calculate the U-factor for the construction assembly (e.g walls) according to ASHRAE 90.1-2007 Appendix A if one or some of the construction layers properties are not specified in the ment

The project consists of non residential building of 6 stories.

Hi, Currently I'am working on a LEED Core & Shell mixed development project, and I have an issue on develop model regarding HVAC design.

Hello all, I'm participating in a project of a building of 20 floors of offices, of which the first corresponds to shops and entrance hall.

As it relates to occupancy sensors being installed in all 'back of house' spaces for this credit, what encompasses back of house spaces? Is there a comprehensive list? i.e.

What are the mandatory provisions for fan coils whose coils are heated through electrical resistances? I think par. 6.4.3.3.1 for the control. Something else?

I have an existing 90,000 SF, 3-story office building in Massachusetts consisting of VAV boxes with electric reheat and rooftop units that also have electric heat.