Heat pump water heater

Hi Ammon, I've not had experience including heating-only equipment in this credit and it'd be great to hear from anyone that has, since this has actually been puzzling me for a while! The credit language is written as if it applies to heating, cooling, ventilation, and refrigeration, but only cooling and refrigeration is ever addressed. My thought is that the best approach, from the standpoint of the credit intent and the calculations, would be to use the nominal heating capacity of the equipment (found on the cutsheet or submittal), convert it to tons to keep the units correct in the calculation, and then include it in the table. If it's serving water heating and not space heating, it may be better to list it as an "other" type of equipment with a ten-year lifespan. You can use a longer value for the lifespan if the manufacturer is able to provide backup documentation, such as a warranty period.