Emergency traffic and replacement traffic need separate front doors
Two different people arrive at an HVAC site and they are not looking for the same thing.
One visitor has no heat tonight and wants a phone number and an arrival window. The other is comparing systems and wants specifications, financing terms and a sense of whether your crew is competent. A single home page written to please both usually serves neither.
Give each a clear path from the top of the page. A prominent call route for the urgent visitor, and a distinct path into equipment and replacement content for the researcher. Do not bury the second one under a scrolling gallery.
The urgent path should be short: tap to call, a visible arrival expectation, and a fallback form for people who will not call. The replacement path can be long, because that reader will read.
Commercial and light commercial deserve their own entry as well if you take that work. A property manager will not dig through residential content to find out whether you handle rooftop units.