Modulating Economizers: Recovering Heat, Recovering Profit

By Steen Hagensen

In most boilers today, heat exchange devices, or economizers, pre-heat the incoming feed water with the boiler’s own exhaust gases to maximize efficiency. Over the years, improvements have been made to economizers that now have better heat transfer rates than ever, but it is still only very few boilers that can benefit from their installation. Atmospheric and fan-assisted boilers don’t create a powerful enough draft to force flue gases through the economizer, which makes them unsuitable for economizer installations.
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