No More Constant Speed Pressure Boosting Under ASHRAE 90.1 - 2010

By Mark Bingham

“Constant speed pressure boosters are DEAD and GONE TO HEAVEN!”

That was the prevailing message recently from Chris Edmondson, CEO of JMP, as he briefed the folks here at about the upcoming mandatory changes under SECTION 10.4 of the new ASHRAE 90.1 – 2010.

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Designing Commercial Sewage Lift Stations Part 6: A Sizing Example

By Chris Edmondson

 Over the last several weeks we’ve talked about many aspects of designing a commercial sewage lift station, from flow rates to components.  In this blog, we’re going to work through a really simple sizing example. Let’s say we are sizing a sewage station for a retirement facility made up of primarily independent living units. 

 

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Commercial Sewage Lift Stations Part 5 - System Components

By Chris Edmondson

Just in case you haven’t gotten the message in this series on designing a commercial sewage lift stations, the design process involves a lot more than selecting a sewage pump or sump pump.  The most reliable sewage lift

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Commercial Sewage Lift Stations Part 4 - Pump Types and Control Requirements

 Pumps used in commercial sewage lift stations come in a variety of types (effluents, grinders, etc.)  To determine which type is right for your application you must answer two questions:

  1. What size solids will have to be pumped?
  2. What is the size of the discharge pipe?
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Commercial Sewage Lift Stations Part 3 – How To Determine Total Dynamic Head (TDH)

By Chris Edmondson

 In a previous blog we discussed how to determine the flow for a commercial sewage lift station so you determine the necessary pump capacity.  Today we are going to discuss Total Dynamic Head, which is also critical to sizing a pump for a sewage lift station.  Not only is it absolutely necessary to select a

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