TECH TIP: What is the Energy Design Rating, and why are there 5 of them?

TECH TIP: What is the Energy Design Rating, and why are there 5 of them?

Tech Tip
CAHP TRANSITIONS TO THE ENERGY DESIGN RATING In 2017, the California Advanced Homes Program (CAHP) – now CAHP Zero Net Energy (ZNE) – switches the program eligibility and incentive metric from the CAHP score to the Energy Design Rating (EDR). CAHP-ZNE’s primary reason for shifting to the EDR is to align better with national standards. The EDR, like the CAHP score, is a whole house energy efficiency metric in which ratings closer to zero mean better performance and higher incentives. The current versions of CBECC-Res and EnergyPro already generate multiple versions of the EDR. Below is a list of the four EDRs currently available. CAHP also developed a 5th EDR – the CAHP-ZNE EDR – which is the Proposed Design EDR with adjustments to give additional credit for CAHP-ZNE point…
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