Mastering the outdoor reset curve Tekmar.

Mastering the outdoor reset curve

The problem with installing a boiler that matches the building’s heat loss at design-day conditions is that it is oversized for roughly 90% of the heating season We too often encounter modulating condensing ultra-high efficiency boilersones that were installed and set to operate at their maximum water temperature and the outdoor sensor was never installed Hydronic systems utilizing cast iron baseboard and/or radiators present an ideal application for adding ODR

Does it make any sense to install hot water boilers that are sized to match design-day ambient outdoor air temperatures? Every time they turn on, they run full-tilt as if every day is at outdoor design temperatures (coldest weather you experience based on ASHRAE guidelines).

Up front cost may be the deciding factor when presented the choice between a chimney-vented lower efficiency vs. a direct-vented high-efficiency modulating condensing boilers. Or maybe it’s the perception

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TAGS: Hydronics
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