I have a rental unit without A/C. The builder, in 1982, ran a line-set and A/C power to under the deck for A/C and many owners have added horizontal discharge condensers placed under the deck.
The problem is that the A/C line-set between the condenser and the evaporator is only for R-22 refrigerant. Running a new lineset would be extremely expensive, requiring the opening of the walls.
There are very few R-22 horizontal discharge condensers still available. The only one I've found still in stock is a Coldpoint, and the only size left is a 4 ton unit which is way oversized. I really only need a 2.0 to
2.5 ton unit for 1152 square feet on two levels.Humidity control is not an issue since it's in Northern California where the humidity is low (in fact humidifiers are more often used by people here than dehumidifiers).
What are the disadvantages of using an over-sized compressor given that humidity control is not an issue.
The other option is a vertical discharge R-22 condenser with some sheet metal work to try to direct the exhaust to the outside.
I've had several HVAC companies out. The last one was the one that told me about the Coldpoint units but he found out the same thing I found out--the only ones still available are the 4 ton.
I need to do this all pretty fast because in another month California is implementing new regulations for A/C installations which will raise the cost significantly.