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... READ MORE
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Variable Speed Chilled Water Systems: Demand Reset
Norm Hall
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June 21, 2021
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... READ MORE
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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... READ MORE
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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... READ MORE
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Hydraulic Elevator Sump Pumps in Ohio
Norm Hall
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April 6, 2020
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... READ MORE
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Hydraulic Elevator Sump Pumps in Michigan –Meeting the Code
Norm Hall
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March 30, 2020
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... READ MORE
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The Department of Energy (DOE) pump standards goes into effect on January 27, 2020. This affects projects you are sending out to bid right now!... READ MORE
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My March 11th blog article concerning The Department of Energy Standards for centrifugal pumps raised questions about the engineer’s or owner’s choice of variable frequency... READ MORE
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The Department of Energy (DOE) Standards for centrifugal pumps will start to affect construction projects that you are designing today. These standards for minimum pump... READ MORE
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The ASHRAE Energy Standard 90.1 and the 2015 Michigan Energy Code require the AHRI plate heat exchangers used in heating and cooling applications be tested... READ MORE
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