IEQc4.4 watchers should check out LEED Interpretation #10250, issued January 1, 2013. It makes what used to be a black and white credit requirement has become more nuanced.
• Urea, when used as part of a melamine-urea-formaldehyde (MUF) resin, is allowed as long as the composite wood product meets California Air Resource Board (CARB) Airborne Toxic Control Measure (ATCM) 93120 requirements for ultra-low-emitting formaldehyde resins (ULEF), or 0.05 parts per million—requirements that are quite strict.
• Melamine-formaldehyde resins that use urea as a “scavenger” are not allowed, even with ULEF testing showing that they meet the same emissions standard.
Our products editor Brent Ehrlich provides more detail and background in this post: New Rules for Formaldehyde in IEQc4.4
This could be updated again in April—so stay tuned.