Condensing Boiler Plant Piping Design & Control Part 2: Variable Primary Flow Systems

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There are basically two ways to incorporate variable flow into a condensing boiler system. You can have just one set of primary pumps, which vary flow through the entire system from boilers to coils, or you can have both primary and secondary pumps, which vary flow through their respective loops. In this blog, we’ll address the former....
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Condensing Boiler Plant Piping Design & Control Part 1: Setpoint Control Sensor Location

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Where should the boiler set point control sensor be located in a condensing boiler system? Given the fact that we (hopefully) know that the return water to a natural gas-fired condensing boiler should be 120°F or below in order for the boiler to condense, simple logic may lead you to believe that you should control based on the return water temperature...
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Energy Efficient Hot Water Boiler Plant Design Part 6: Best Applications for Condensing Boilers

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Condensing boiler applications dovetail nicely with most of today’s energy efficient HVAC strategies, as well as ASHRAE 90.1 – 2010 and 2013 requirements. New and existing boiler plants are ripe with opportunities for condensing technology and can offer payback in as little as 2-3 years. Here we’ve listed some of the top applications for condensing boilers and why they are a good choice in each situation...
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Energy Efficient Hot Water Boiler Plant Design Part 5: Fan Coils, Pumps & Flow Control

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So you’ve decided to use condensing boilers on your next project – GREAT! Just remember that this decision will impact other aspects of your mechanical design. Condensing boilers DO NOT operate properly in systems that are designed around traditional non-condensing technology.
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Energy Efficient Hot Water Boiler Plant Design Part 4: What To Do With Boiler Condensate

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A properly applied condensing boiler generates a lot of condensate – 5 gallons for every 1,000,000 BTUH input. In a large commercial or institutional building this can easily add up to several hundred gallons per week. But where does all that condensate go?
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