Posts Categorized: Ask DAC

Ask Rick: Pumped Glycol Energy Recovery | What size systems make sense for Konvekta?

Q.  What size systems make sense for Konvekta?   I am working on a project where we are considering glycol run around coils for heat recovery. I would like to consider using a Konvekta system.The building in question is an existing hazardous materials storage building with 24×7 exhaust air requirements. There are 16 separate exhaust… Read more »

Ask Rick: Freeze stat location?

Q: Does a freeze stat always go after preheat coil and before chilled water coil or is it OK putting it on the leaving side of chilled water coil? A: You should use a freeze stat to protect your water coils from freezing. Rooftop units with water coils should always have freeze stats, even if using… Read more »

Ask Rick: VAV Diffusers | R-Ring – Pressure Independence Option

Q.  Is it required to add an R-Ring for every Acutherm Therma-Fuser installed?  Will the R-Ring replace the return air diffuser (typically installed with regular supply air diffuser)?  In what application do you need an R-Ring?  Why is it an option? Is it required to add an R-Ring for every Acutherm Therma-Fuser installed?    No… Read more »

Ask Rick: Air Handling Units | Single point power connection?

Q.  We are in a disagreement over specification language.  In your opinion what does a “Single Point Power Connection” include?  Thanks,   Boston Engineer.   Good Question.  This comes up all the time. Depending on the application and circumstances “Single Point Power Connection” is defined in multiple ways.  Typically there are assumptions made, often times wrong,… Read more »