You want to make sure your new air conditioning system is sized properly. Most contractors just size the ac system based on your square footage. This method can lead to over or undersizing of your air conditioner. Having an under or oversized air conditioner can cause early failure.
To complete the design load calculation the contractor will need to take measurements during the initial visit to your home and ask you some questions. The calculation is usually done using software, and should be based on professional guidelines such as Manual J from the Air Conditioning Contractors of America (ACCA) or similar method.
Improving the system’s air-filtration capabilities is also easiest to do as part of a general upgrade. Check ratings of air filters and whole-house units for those that combine value and efficiency.
Here are other factors to keep in mind:
- Match new equipment. Since energy costs are not likely to drop in the foreseeable future, you should consider replacing your entire cooling system when faced with a major repair of your old system. If you replace only the condenser (the outdoor unit that houses the compressor, the condenser coil, and a cooling fan), you have a “field-matched” system that can be less efficient than advertised and that may require more repairs because of undetected incompatibilities between the two. Replacing the cooling coil attached to your furnace (sometimes called the indoor coil or evaporator coil), or the indoor blower coil (a blower and evaporator coil inside a cabinet) if you don’t have a furnace, add to the cost but is the only way to ensure you will get the efficiency you want.
- Consider compressor type. A reciprocating compressor is more trouble-prone than a scroll-type one. Scroll-type compressors also tend to be higher in efficiency and quieter than reciprocating compressors. Check the product literature for compressor type.
- Inspect duct work. Leaky ducts can dramatically decrease energy efficiency of your central cooling and heating system. Sealing and insulating ducts can cut cooling and heating costs by 40 percent per year. Insulate ducts in unconditioned spaces with R-6 duct insulation. Have a contractor seal all seams and joints in the duct distribution system.
- Zoned-system concerns. A large or multistory house is often divided into several heating and cooling zones to improve temperature control. However, this type of system is complex and has many more moving parts and controls, so it may require more repairs.
Call us today at (480) 389-3019 to schedule an appointment that works for your schedule. Your time is important to us and we want to make sure you are 100% satisfied with our services.