Many northern state energy codes require economizers for chilled water systems. Waterside economizers per ASHRAE 90.1-2013 and 2010 shall provide up to 100% of the …
Water-Side Economizers Part 2: State Energy Codes
Water-Side economizers are here to stay in the northern climates. Using the cooling tower to create cold water and transferring that temperature to the chilled water …
Free Cooling Heat Exchangers (Part One)
The ASHRAE young engineers heard about the free cooling system in the recent tour of the DTE Vantage Dearborn Central Energy Plant. The free cooling …
Minimum Boiler Efficiency & New D.O.E. Standards
The United States Department of Energy (DOE) has some minimum efficiency standards which go into effect on January 10, 2023, for Commercial Packaged Boilers. What …
Boiler Safety: CSD-1 Emergency Shut-off Switches
The ASME CSD-1 Controls and Safety Devices for Automatically Fired Boilers is a standard for many State codes including Michigan and Ohio. This standard exists …
Variable Speed Chilled Water Systems: Demand Reset
There are multiple methods to vary pump speed in HVAC chilled water systems. A common method is the use of a differential pressure transmitter at …
Domestic Water Recirculation Codes: Here is What We Heard
In the 04-05-2021 Monday Morning Minutes, we asked for your opinion on the length of the domestic water recirculation line from source to fixture. Here …
Domestic Water Recirculation Codes: What Is Your Opinion?
I recently received an email from an engineer discussing the type and location of balance valves in a domestic hot water recirculation system. He brought …
Hydraulic Elevator Sump Pumps in Ohio
The State of Ohio elevator codes leaves the solution of pumped hydraulic oil and water to the design engineer. Our updated R. L. Deppmann plumbing …
Hydraulic Elevator Sump Pumps in Michigan –Meeting the Code
The State of Michigan is very specific in codes regarding sump pumps located in hydraulic elevators. Our latest and updated R. L. Deppmann Plumbing website …