Non-condensing water heaters are gas units that do not condense exhaust gases to capture extra heat. They typically operate below 90% efficiency because heat is vented outdoors with combustion gases. These heaters are simpler in design, often less expensive, and easier to install, but can have higher operating costs compared to condensing models.
/nɒn-kənˈdɛnsɪŋ ˈwɔːtər ˈhiːtərz/
Non-condensing water heaters are gas units that do not condense exhaust gases to capture extra heat. They typically operate below 90% efficiency because heat is vented outdoors with combustion gases. These heaters are simpler in design, often less expensive, and easier to install, but can have higher operating costs compared to condensing models.
What makes a water heater non-condensing?
It vents hot combustion gases without capturing extra heat from condensation, resulting in lower efficiency.
Source: The Cooling Company
Efficiency, venting, and cost differences at a glance.
A homeowner with existing venting and a limited budget chooses a non-condensing water heater for lower upfront cost and easy installation.
Confirm proper venting and consider long-term energy costs when comparing non-condensing and condensing models.
“Confirm proper venting and consider long-term energy costs when comparing non-condensing and condensing models.”
Non-condensing water heaters have been the standard for decades due to their simple, reliable design.
Do non-condensing water heaters need special venting?
They use standard metal venting, but sizing and installation must meet code.
Are non-condensing water heaters cheaper to install?
Usually yes, especially when compatible venting already exists.
Can I upgrade to a condensing model later?
Yes, but it may require venting changes and a condensate drain.
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