I'm working on a report about the opportunity for homeowners to replace their central ACs with heat pumps. I'm running into trouble with the phrase "AC-to-heat pump switch."
Should it be:
- "AC-to-heat pump switch" or
- "AC-to-heat-pump switch"
My instinct says the first one since "heat pump" wouldn't normally be hyphenated. But that option also makes it sound like I'm talking about pump switches, which is incorrect.
AC–to–heat-pump switch
endash twice then hyphen