Deep Retrofit Study |

The sources and sinks of carbon emissions are used to calculate the carbon balance, i.e., net emissions, as the embodied carbon plus the operational carbon minus the avoided emissions from exported renewable energy and carbon offsets. [...] In order to serve the electrical back-up boiler and AWHP the building transformer will need to be reviewed by and electrical engineer and may need to be improved to serve the demand from the electrical systems. [...] The domestic hot water system requires additional storage tanks and uses the electric boiler to "top-up" the water beyond the capability of the heat pump to 60C. [...] The savings compared to the Phase 1 Retrofit are a result of the central AWHP (even with the addition of cooling). [...] Once the retrofit plan is implemented, it is the 27803.000 Page 30 responsibility of the designers of record and the contractor to review the construction and materially maintain the intended energy performance of as-constructed retrofit projects.