Average cost of an average-sized system in a. Cost factors · Cost of central air conditioning for 2000 square meters. Replacing an oven and air conditioning combination is cost-effective if repair prices are close to 30 percent of the cost of a completely new HVAC unit. Most heating, ventilation and air conditioning system replacements will require new ductwork, so be sure to check with an HVAC professional to see if you need replace ducts.
Some HVAC companies offer discounts on more expensive options, such as a zone system, and many local energy companies offer discounts or rebates for upgrading or replacing an HVAC system, especially if it's an energy-saving option. The total price depends on the size of the air conditioner and whether there is a need for repairs to the existing HVAC system. If the air conditioning unit is located in a historic house, in a small attic or in a blow-insulated attic, or if the air conditioning unit requires custom-made parts, the price of the installation will increase. Some things homeowners can do to maintain a new HVAC unit after having it installed by a professional include replacing air filters regularly; sealing any air leaks in the ducts; cleaning up any debris surrounding the HVAC unit; maintaining a free space of 2 feet around the unit; replacing or adjusting the thermostat; and cleaning the evaporator coil, evaporator trap, and drain pipe with a garden hose. HVAC unit prices depend on the size of the house, the length of the ducts, and the size, type, and brand of the HVAC system.