@ 42mins. Just a comment regarding the SAP-listed installation method for WWHRS. In a standard residential dwelling, ONLY 1no WWHRS unit can be installed as System A or C. ALL secondary WWHRS units MUST be as System B. This is so the water heater, does not pull cold water through multiple WWHRS units, if only 1no shower is in use. Usually, when designing in WWHRS the 'main' shower (or showers, if in close enough proximity) will be designed in as System A or C to maximise the WWHRS impact and SAP points gained. It is of course, perfectly ok to design-in ALL showers as System B, but this is a slightly less efficient configuration, although the impact of System B vs System A/C is significantly minimsed in the SAP model where multiple showers are present. (note: this is my personal account, but I work for Recoup)
Thank you to Stephen for a thorough explanation, and to RIBA
This is great - thank you RIBA and especially Stephen Barnshaw 🙂
@ 42mins. Just a comment regarding the SAP-listed installation method for WWHRS. In a standard residential dwelling, ONLY 1no WWHRS unit can be installed as System A or C. ALL secondary WWHRS units MUST be as System B. This is so the water heater, does not pull cold water through multiple WWHRS units, if only 1no shower is in use. Usually, when designing in WWHRS the 'main' shower (or showers, if in close enough proximity) will be designed in as System A or C to maximise the WWHRS impact and SAP points gained. It is of course, perfectly ok to design-in ALL showers as System B, but this is a slightly less efficient configuration, although the impact of System B vs System A/C is significantly minimsed in the SAP model where multiple showers are present. (note: this is my personal account, but I work for Recoup)
Ellis your comnent helps a lot!
lovely... more red tape
Anything on part G at all