Code Cycle: 2019 Standards Only!
Reference: 2019 CalCERTS New Construction Training Manual - Chapter 5, Page 48
Compliance Form: Incorporated into 2019 CF3R-PLB-22
Impact: New HERS visual verification
Notes: An inspection to verify that the DHWR unit(s) and installation configuration match the compliance document and the DHWR(s) is certified to the Commission to have met the requirements.
Visual Verification Protocols:
- The make, model, and CSA B55.1 or IAPMO IGC 346-2017 rated effectiveness of the DWHR unit(s) shall match the compliance documents. The DHWR unit(s) shall also be verified as a model certified to the Energy Commission as qualified for credit as a DWHR unit(s).
Above is a label from a drain water heat recovery unit which displays its verified performance with CSA B55.1 and its rated performance (effectiveness) of 43.5%.
- The installation configuration (e.g. equal flow, unequal flow to the water heater, or unequal flow to the showers) and the percent of served shower fixtures shall match the compliance documents. See attachments for diagrams of these three options.
- For water heating system serving a single dwelling, the DWHR system shall, at the minimum, recover heat from the master bathroom shower and must at least transfer that heat either back to all the respective showers or the water heater.
- For central water heating system serving multiple dwellings, the DWHR system shall, at the minimum, recover heat from half the showers located above the first floor and must at least transfer that heat either back to all the respective showers or the water heater.
- The DWHR unit(s) shall be installed within 1 degrees of the rated slope. Sloped DWHR shall have a minimum lengthwise slope of 1 degree (a larger slope may be permitted by the manufacturer). The lateral level tolerance shall be within plus or minus 1 degree.
- The installation shall comply with any applicable California Plumbing Code (CPC) requirements. This is the responsibility of the local building department and not the HERS Rater.