Any person who loves to drive fast classic cars understands the need for proper air-to-fuel mixture or ratio. If you are old enough to remember …
Condensing Boiler Specification – Part 6 – Variable Primary-Variable Secondary Example
Variable Primary-Variable Secondary pumping in hydronic heating systems has many advantages when this pumping method is chosen for the condensing boiler heating system. Today we …
Condensing Boiler Specification – Part 5 – Primary-Secondary Thoughts
Primary-Secondary pumping in hydronic heating systems is a tried-and-true method of protecting boilers while benefitting from the use of variable speed pumps in the secondary …
Condensing Boiler Specification – Part 2 –Boiler Temperature Reset Made Simple?
Last week we suggested using an efficiency less than the published maximum when selecting a hydronic condensing boiler for a comfort heating system. This week …
Condensing Boiler Specification – Part 1 – Design Efficiency
Condensing boilers can provide optimum efficiency for your clients’ heating systems. What do you need to understand and decide on when creating the specification and …
Primary Secondary Piping Basics: Part 3 – The Common Pipe and Boiler Loops
Many boilers manufacturers recommend or suggest using a primary secondary arrangement rather than primary variable pumping. Often this piping scheme is suggested to avoid flow …
Primary Secondary Piping Basics: Part 2 – The Common Pipe (also Referred to as the Decoupler)
R. L. Deppmann Company receives calls about the size and the length of the common pipe just about every week. Gil Carlson, ASHRAE fellow and …
Primary Secondary Piping Basics: Part 1 – Terms
The basic design concepts of piping are important for a properly operating hydronic heating or cooling system. We have a great number of new engineers, …
Condensing Fire-tube Boiler Heating Systems: Why Primary-Secondary Pumping May Make Sense (Part 2 of 2)
Engineers, today, tend to lean towards primary-variable piping systems in hydronic heating and cooling systems for commercial applications. The simpler piping and elimination of a …
Condensing Fire-tube Boiler Heating Systems: Why Primary-Secondary Pumping May Make Sense (Part 1 of 2)
Primary variable pumping systems are common in large commercial hydronic systems using firetube boilers. When we are designing smaller systems with loads less than one …