CBECC Res 2019 Standard Design DHW Selection

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asked Dec 6

ms0130
11 ●4

updated Dec 6

sashadf1
1154 ●1 ●43 ●10

I'm modeling a SFH using point-of-use tankless electric resistance water heater. I saw that in the analysis results, the standard design is using a UEF HPWH, which makes the electric resistance water heater definitely failing the compliance. How is this standard design option selected?

I modeled the same home in CBECC 2022, which standard design adopted a point-of-use water heater.

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answered Dec 6

LukeInCali
116 ●7 ●3

The Standard Design is selected per the ACM (Alternative Calculation method). In 2019, there was no exception to the UEF 2.0 HPWH in the Standard Design, however in 2022 a point of use electric resistance unit was added as a Standard Design assumption for small additions and new construction <=500 sq.ft.

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Asked: Dec 6

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Last updated: Dec 06 '24

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CBECC Res 2019 Standard Design DHW Selection