Whether central air costs a moderate amount or a great deal comes down to one question asked before any equipment is chosen: does the house already have ductwork that can carry the airflow, because adding a cooling coil to a working duct tree is a small job and building a duct tree into a finished house is a large one.
How much to install central air starts with what ductwork exists
A house with a forced-air furnace usually has a tree that can take a cooling coil, subject to sizing. A house heated by boilers, baseboards or radiators has none, and the choice becomes building ducts, running high-velocity small-bore ducts, or fitting ductless heads instead.
The cost of installing central air when the duct tree cannot carry it
Cooling needs more airflow than heating, so a duct system sized for a furnace alone can be short for an air conditioner. The measurement is airflow of roughly 350 to 400 cubic feet a minute per ton against the static pressure the blower is rated for, and a contractor should measure rather than assume.
How much is a new central air unit once the coil, condenser and line set are counted
Adding cooling to an existing furnace means an evaporator coil in the plenum, an outdoor condenser, a refrigerant line set between them, a condensate drain and an electrical circuit. Any quote missing one of those five has not priced the job you are buying.
How much does central air cost to install once the condensate is sorted
A coil in an attic or above a finished ceiling produces water that must reach a drain, with a secondary pan and a float switch to stop a blocked drain from finding your ceiling instead. It is a small item that causes a large share of the damage claims on new installations.
How much does central air cost against ductless, honestly
Where no ducts exist, get a mini split quote beside the ducted one. Ducted is normally tidier and quieter if the route exists; ductless avoids the joinery, patching and lost ceiling height that retrofitting a duct tree into a finished house involves.
Where this sits beside a loss
The commonest insurance event on a newly installed central system is not the equipment failing but its condensate finding a ceiling: a blocked drain or a failed pump on an attic coil is a sudden water loss and is usually covered, and the fix that prevents it is a secondary pan and a float switch. Where water has already come through, the restoration record of how far it travelled through insulation and drywall is what the adjuster prices.
Questions people ask about central air installation cost
Can I add central air to a house with radiators?
Not by adding a coil, because there is no duct tree to put one in. The options are building ducts, a high-velocity small-bore system that threads through existing cavities, or ductless heads. Each is a different price and a different amount of disruption, and all three are worth quoting.
Will my existing furnace work with a new air conditioner?
Usually, if its blower can move the airflow the cooling capacity needs and it is not near the end of its life. If the furnace is old, doing both at once avoids paying twice for the same access and gets the pair matched properly.
Does adding central air need a permit?
In most jurisdictions yes, because it involves electrical work and refrigerant. The inspection is what confirms the circuit, the disconnect and the condensate arrangement are right, and it is also the record that the work was done to code when you come to sell.
How long does the work take?
Adding a coil and condenser to a good duct tree is commonly one or two days. Building a duct tree into a finished house is a week or more with joinery and patching afterwards, which is the part of the schedule people underestimate.
How much does it cost to install central air?
It comes down to whether the house already has ductwork that can carry the airflow. Adding a cooling coil, an outdoor condenser and a line set to a working duct tree is a small job; building a duct tree into a finished house is a large one. Ask for the coil, the condenser, the line set, the condensate drain and the electrical as separate lines so two bids can be compared.
How much does it cost to put in central air without ducts?
More, because the duct tree has to be built first, and in a finished house that is a week or more of joinery and patching on top of the equipment. Get a ductless mini split quote beside the ducted one: ducted is normally tidier and quieter if a route exists, while ductless avoids most of the building work.