Hydronic Balancing Part 2: Making the Most of System Diversity

/
Practically any commercial or institutional building has a certain amount of diversity within its cooling load, meaning that peak loads will never occur simultaneously in all sections or zones of a facility. By mapping out the individual load patterns of these sections, engineers can adjust the mechanical design to reduce the overall amount of installed cooling capacity. This means incorporating variable flow, which necessitates precise hydronic balancing.
Read More

Hydronic Balancing Part 1: The Standards and Driving Force Behind the New Requirements

/
Balancing plays a critical roll in the performance of any hydronic heating and cooling system. For that reason alone, ASHRAE has made hydronic balancing a non-negotiable stop on the road to compliance with ASHRAE 90.1-2010 (or 2013), starting with this requirement....
Read More

HYFAB Positioned to Meet Increasing Demand for Pre-packaged Hydronic Systems

/
If you, like so many in the commercial HVAC industry, are concerned with the increasing shortages in skilled pipe fitting labor, JMP has some good news. In response to increasing demand for pre-fabricated hydronic systems, HYFAB has relocated all operations to a much larger, fully equipped 27,000 sq. ft. facility at 206 Seneca Drive in Greensboro, NC. It is one of a few manufacturing facilities in the southeast that is totally dedicated to the design and manufacturing of hydronic packages for HVAC, plumbing, and process applications.
Read More

Condensing Boiler Plant Piping Design & Control Part 7: Calculating Boiler Cycle Time

/
How long should a boiler run before it cycles off? And how long should it stay off before it cycles back on? The answers to these questions will of course vary from system to system. As a general rule, the combination of boiler run time and off time should never be any less than 10 minutes. Under normal operating conditions, the run time will always be dictated by two factors....
Read More

Condensing Boiler Plant Piping Design & Control Part 6: Boiler Cycling and Supply Delta T

/
Identifying the stop and start range of a boiler system is a critical first step in controlling boiler staging and/or sequencing. This range defines what the boiler supply temperature is at full fire and what the supply temperature is at no fire. It is commonly referred to as the boiler supply Delta T.
Read More