Dear all, I just wanted to double check that the VRF system lifetime is 15 years (considered a packaged AC). Is this true? Thanks,

I have about sixty-five split systems in two apartment buildings using R-410a. The factor that is keeping me from meeting this credit's requirements seems to be Rc (lb/ton).

The link above for the 2007 ASHRAE Applications Handbook, HVAC Applications seems to be broken.

Dear all, I am currently working on a project with a VRF system. We have contacted the manufacturer for non-default refrigerant leakage rate values.

The link for explaning Greenhouse Effect explained and illustrated under publications is not working. Dave

Hi all, Currently we are working on a project which does not have a fire suppression system, but is trying to achieve "Enhanced refrigerant management" credit in LEED NC 2009. In the LEED online fo

Here's a stumper for y'all. A "heat pipe" uses refrigerant migration (without compressors) between two coils for heat recovery.

Our system has 2 different refrigerant types. One type in the compressor and another type in the refrigeration circuit.

I'm currently working on a LEED NC project on a central university library projects.