Previously, the R. L. Deppmann Monday Morning Minutes looked at pump location in a primary-variable boiler heating system. We made a very definitive statement about... READ MORE
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We recently received several calls for our recommendation on whether to pump into the boiler or out of the boiler in a primary variable heating... READ MORE
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What is the minimum flow rate a variable speed pump can provide without damage to the pump? This is a question every engineer should ask... READ MORE
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We are continuing with the series on Condensing Heating System Efficiency. Today, we are discussing condensing boiler temperature reset for increased efficiency. Hydronic condensing heating... READ MORE
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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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You understand the differences between premium efficiency (IE3) motors and PMAC or ECM motors (IE4&5). You understand the cost implications of both styles of motors.... READ MORE
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Can I and should I specify permanent magnet motors (PMAC) on my hydronic system pumps? The last R. L. Deppmann Monday Morning Minutes showed the... READ MORE
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A customer recently called us about an unusual occurrence in a closed hydronic cooling system for an ice rink. The system was filled using a... READ MORE
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An engineer asked a question about using a variable speed pump for air temperature control in lieu of a two-way control valve. What are the... READ MORE
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An engineer asked a question about using variable speed pumps for air temperature control in lieu of a two-way control valve. The question clearly makes you... READ MORE
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