When we decided to install a new air conditioning unit, I focused on understanding the costs involved to avoid any surprises. Typically, the cost can vary widely depending on the unit's size, efficiency rating, and your specific requirements. For a moderate-sized unit, the cost might start around a few thousand pounds, but installation might add more to the budget, depending on the complexity. I learned the hard way that it's important to consider not just the upfront costs but also the potential savings on energy bills with a more efficient system in the long run. Always make sure to get a detailed quote that includes all potential extras, such as any electrical work or structural changes needed. In my search for an answer, I stumbled upon another helpful site that might be of interest. Come to think of it, investing in a modern, efficient system could be more cost-effective over time.