Buy Air Conditioning Outdoor Unit

can any tell me how well the external heat and air conditioning packages.?
I think to get an outside heating and air conditioning package for my house. I wondered how they work and how they are saving energy. Also, where is a good place to buy a unit. I need a 2.5 ton unit, or 3. I could stay with propane heaters since I have a propane furnace now existing. But I could go with all electric if it is profitable.
Packaging outdoors are as good as the split and they have the same requirements for energy savings any AC or heat pump … You can also get those who heat with propane central air … all you have to do is remove your heater and run the pipes of the unit package in the duct system you have … but if it were me I would Simply replace my existing boiler by a boiler more efficient and more recently adding air to the heart of this ….
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