Webtemperatures for Schedule 40 PVC and incorporate ceramic heating blocks and an auto-fire system for freeze protection of the heat exchanger and water piping. The water heater(s) shall be design certified by CSA according to ANSI Z21.10.3 CSA 4.3 and meet the energy efficiency requirements of NRCan and the current edition of ASHRAE 90.1. Aug 12, 2024 ·
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