Article: Designing Dual Return Commercial Condensing Boiler Systems

Maximizing hot-water-system efficiency in commercial condensing boilers and water heaters.

When it comes to hot-water-system efficiency, most of the discussion seems to center on specifications associated with boilers and water heaters. For maximum operational efficiency to be achieved, consulting-specifying engineers and facility owners and managers need to consider overall system design as well. Utilizing dual returns when configuring a hot-water system can result in an 8-percent improvement in efficiency, compared with more traditional single-return designs commonly used in facilities, helping to lower operating expenses.

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