I always install a brass shut-off valve into a wall alcove behind the refrigerator and run a coil of copper tubing from that valve to the refrigerator.

The unit went out 10 months later and he started blaming the tenant and also blamed the evaporator coil in the attic for burning out the compressor.

@Luke BabichWondering why you need to core through the concrete floor... are you intending to install the furnace/evaporator coil in the basement?

Now I ensure the feed line is at least 5ft coiled behind the fridge as you will need a good 3-4 ft of clearance to get behind it if its between base cabinets.

I believe these little coils fit over you mainr feeds.

You air handler may need to have the coil cleaned or the outside Condensing unit may need a good cleaning.

Just choose how you want to live.The concept of tankless sounded great but there is maintenance on the heater coils and, for some models, there is a longer delay in getting hot water out the faucet.

I don't own a roofing coil nailer and am fine if I never do.

The outdoor condensing unit alone one a multi zone ductless system is often the same or more that a furnace, AC coil ,and Outdoor condensing unit combined.

If the first leak seal doesn't work then usually that means there are multiple leaks, the compressor is bad, the coil is bad, etc and you have to do a more drastic repair/replacement.