Really want a good cooling unit

Several years back our partner plus I obtained this outdated Victorian lake house in the city where the people I was with and I lived in the northeast section.  This lake house had not had many replacements plus was a true fixer upper. The first year or several the people I was with and I focused on the downstairs dining room plus bathrooms. We also did a ton of wall paper stripping, sanding,  plus painting plus even stripped the paint from some of the woodwork in the family room. The central oil furnace in the lake house was older but was still functioning so the people I was with and I decided to let it go and not replace go for another year.  The lake house had never had any a/c aside from a window component here plus there mostly in the home offices. After suffering through an overheated summertime separate from much a/c, the people I was with and I were determined that the people I was with and I would add some central air to the home.  It was also a great time to replace the oil furnace plus the people I was with and I gained a major discount for doing both the oil furnace plus the central air at the same time. But the people I was with and I wondered how they could add central air conditioning to such an outdated lake house that only had a few heating vents.  The Heating plus A/C company the people I was with and I hired to install the new systems explained how they could undoubtedly use the existing air vents for the a/c. They might not be as effective as if installed in a brand new lake house but they would undoubtedly do the job. The new oil furnace was an energy efficient model plus looked very small in the basement compared to our outdated oil furnace.  The a/c compressor components were installed outside with tubing running to the component installed next to our central oil furnace. It looked all actually complicated but they made it work. We now take satisfaction with every season of the year in our outdated house in comfort.