Air Source Heat Pump Conversions and Upgrades (SF/MH)
Finally, in December, the RTF got around to updating the Single Family and Manufactured Homes ASHP Upgrades and Conversions measures. For the conversion measure, the specification is converting from an electric FAF to an 8.5 HSPF heat pump. While the upgrade measure specifies upgrading from an 8.5 HSPF heat pump to either a 9.0 HSPF heat pump or a variable capacity heat pump. These measures are additive so a program can use both the conversion and the upgrade measure if the goal is, for example, conversion from an electric FAF to a 9.0 HSPF. Several changes to the proposed updates were made at the RTF meeting itself, so final savings, costs, or cost-effectiveness estimates are not yet ready to share. For ASHP Conversions the RTF opted to develop only an “any insulation” measure and to remove measure identifiers for good, fair and poor insulation. The group determined that savings are to be based on weighted average results from evaluations and savings and costs will be estimated for two saving periods using an RUL approach. For ASHP Upgrades they did something similar, opting to develop an “any insulation” measure for upgrades as well, while savings are to be based on calibrated SEEM runs.