Massachusetts Specialized Energy Code - Energy Recovery

[MassEnginer0004]

Hi all,

Looking through the mass energy code (IECC 2021) and the specialized opt in energy code (required in certain towns in mass), it looks like an energy recovery system is required for ALL exhaust systems, unless deemed hazardous by the IMC ( in my case it is not). Code section C403.7.4.2 modified by specialized opt-in code. We have low flows, less than 2000 CFM on the OA and exhaust, additionally the exhaust cannot mix with the outside air (contaminated lab exhaust). Our only option to get the prescribed 50% sensible recovery is a pumped glycol loop.

Has anyone else run into this?

Thanks in advance.

 

[PipeFloyd]

I am familiar with a project that originally had an enthalpy wheel to avoid cross contamination and at the end of its service life, was replaced with a glycol loop. Seems typical.

 

[Antifed]

Something I used in a laboratory exhaust energy recovery design was from HPT (heat pipe technology).