The answer to 'how much to replace replacement' depends on several factors, but you can typically expect to pay anywhere from $500 to $2,500 or more to replace an HVAC system component like a furnace, air conditioner, or heat pump. The exact cost will vary based on the size and complexity of the system, the brand and model, the difficulty of the installation, and your local labor rates.
Some key factors that influence the cost include the age and condition of the existing equipment, whether any ductwork or electrical work is needed, and the energy efficiency rating of the new unit. Higher-efficiency models tend to cost more upfront but can save you money on utility bills in the long run. Getting quotes from multiple local HVAC contractors is essential to find the best price for your specific situation.