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.

Hello, I have a few questions regarding how to demonstrate the amount of refrigerant charge. The questions are as below. 1. Situation We are preparing design phase review.

In a project I'm working on , we are using two heat pumps for cooling and heating,such that only one heat pump is going to be used during the summer season(cooling) and both pumps are to be used in

Dear all, The project we're working on will be cooled with centrifugal chillers.

Dear All, I'm trying to fill the EAc4 form, but I don't understand about HVAC&R at all. I'm not too sure what is N, Q and Rc column meaning.

Hi All, I just want to ask if the pre-charge or additional charge of the VRF system is included on the computation for Rc (Refrigerant Charge). Thanks!

Clean agent fire suppressant materials have no bearing on the Life Cycle Ozone Depletion calculation as they are not used as refrigerants.

If I only use HVAC units totally 0.5 lbs of refrigerant on the project, do I qualify for the 2 points in this credit? If I only use many HVAC units with 0.5 lbs of refrigerant per unit, do I still