The answer to 'how much to replace AC' is that the cost to replace an air conditioning system can vary significantly depending on several factors. As an expert HVAC technician, I can provide some guidance on the typical ranges and what influences the final cost.
The total replacement cost for a new air conditioning unit can range from around $3,000 to $10,000 or more, depending on the size of your home, the efficiency rating of the new system, any necessary ductwork modifications, and labor costs in your local area. Higher-efficiency systems and larger homes will generally be on the higher end of that range. It's essential to get quotes from multiple local HVAC contractors to understand the specific costs for your home and situation.