2015 ICC International Energy Conservation Code – C404.8 Drain water heat recovery units commercial and residential
•Must comply with CSA B55.2
•Potable water-side pressure loss < 10 psi at maximum design flow
•Group R occupancies, units must meet efficiency in accordance with CSA B55.1
Essentially we see this as a first step in recognizing the technology. This provision does not require the use of drain water heat recovery units; it simply specifies their required certification where this code has been adopted. If you require clarification on this, please contact us.