Norm Hall
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February 7, 2022
How can you increase the operating efficiency of your condensing boiler heating system? This question was raised in the last R. L. Deppmann Monday Morning... READ MORE
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Dual return condensing boilers can enhance the efficiency of your heating plant by 3-6%. How can an HVAC and Plumbing engineers design the system to... READ MORE
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Several people have asked about the three system connections on the photos of Aerco Platinum condensing boilers shown in the R. L. Deppmann Monday Morning... READ MORE
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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... READ MORE
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Using Bin data with Aerco’s 20:1 & Laar’s 5:1
Dave Shugars
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November 2, 2009
with edit by Norm Hall Printer Friendly (PDF) The last two weeks we defined turndown ratio and last week we introduced ASHRAE Bin data. Turndown... READ MORE
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Using Part Load Heating Data and Turndown Ratios
Dave Shugars
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October 26, 2009
with edit by Norm Hall Printer Friendly (PDF) Last week we defined turndown ratio. Turndown ratio is defined as the ratio of the maximum input... READ MORE
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The Importance of Turndown Ratio in Condensing Boilers & Water Heaters
Norm Hall
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October 19, 2009
Printer Friendly (PDF) Condensing boilers are most efficient at lower return temperatures and lower firing rates. Let’s look at lower firing rates today. Turndown is... READ MORE
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Maximizing Delta T in Boilers
Norm Hall
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September 7, 2009
Printer Friendly (PDF) Last week, we created a chart showing the flow rates and temperatures in an example system so we could maximize the delta... READ MORE
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Printer Friendly (PDF) Last week, we used an AHU unit system example which showed the advantages of reducing the return water temperature at design, as... READ MORE
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Printer Friendly (PDF) Before we start discussing materials of construction, there is a point that we need to understand. Any boiler or water heater can... READ MORE
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