Is this possible, to use R417 A in replacement for the R22?
Does it comply with EAC4? I don't see it as a possible refrigerant in the list provided by LEED.
Thanks

If a dedicated smoking area is on the rooftop of a buildng and there is an operable window on the floor below, does the distance between the smoking zone and the window has to be 25 feet? (or...

Hi,
We need to undertake the Whole Building Simulation option for a school project which consists of 3 buildings on the same site - and part of the same LEED certification. The buildings...

For non-flat paint, is it 150? 100? 50? GS-11-1993 or 2008? Current Limit or Effective Date?

You might get any these answers when referring to the Rating System or Reference guide credit...

I have York Chillers which are used very rarely and only under extreme hot weather conditions, requiring additional cooling.

Unfortunately these Chillers still use R-11 CFC Refrigerant....

I agree with Tristan: LEED for Homes is not applicable if the units (or the building) do not have bathrooms or kitchen facilities. If the building has a central kitchen accessible to the...

Hi,

we are MEP contractors in Abu Dhabi, working on LEED project.
In specifications all AHUs are given 2 sets of disposable filters, prefilter (panel) & main (bag) filter. We are...

The 30% increase in ventilation above ASHRAE 62.1-2007 is a good idea in dry climates. Our issuse is that we have several projects that are seeking LEED Silver with client (GSA) demanding the...

I assume you've also checked out the USGBC's LEED rating system selection policy, which can be found here?
While I don't...

I am having difficulty getting extraction locations for materials used in roofing assemblys. Most suppliers submit this information as being unavailable due to various locations or unknown...