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