I personally have never seen AC in a 26 ft boat. I'm sure you could install it but it would be expensive and would require a generator to use it out on the lake. Without the generator it could only be used with shorepower. I currently own a boat with AC and a generator and believe me it's great but we live on the boat all summer. If you're just doing day boating I don't think the cost is worth it. JMHO