I had a recent experience with replacing the main blower motor on my American Standard gas furnace: the variable speed motor has firmware, so can you guess what they did? The motor has to be programmed by the distributor or it will not work in your furnace. You have to provide the furnace's serial number for the programming. Worse, the local distributor would not sell it to me! They will only sell it to an installer. "Qualification" for an installer is load of nonsense- they just want your EPA refrigerant certification- which is nothing compared to a real license, like plumbers or electricians.

So please:

No serialized parts.

I should be able to buy replacement parts from you or common online suppliers without hassle- like amazon.com or supplyhouse.com.

I should be able to install it myself, at least in theory: so unit comes pre-charged, and various lengths of linesets are available so I don't have to do any brazing.

There is a company making a window unit heat pump: this one https://www.gradientcomfort.com/

You should make something like this.. basically a zero-installation work version of your product. This will be a big hit in places with insane labor costs- like New York City.