A Checklist for Choosing the Right Residential HVAC System

Choosing an HVAC system for your home can be overwhelming, so it can be helpful to have a few tips to help you find the right system. When you're seeking the help of an HVAC company in Kennesaw for HVAC installation, be sure to look for not only certain aspects of the system itself, but specific qualities in the HVAC company as well.

Furnace Types

There are 3 basic types of furnaces for you to consider. The first, single stage, is the least efficient type of furnace because it's also the simplest. Single-stage heating means that the furnace is either off or on, which makes it less efficient because of the peaks and valleys. The second type of furnace is a two-stage furnace, which means it has both a high and low setting. Rather than shutting off when the temperature hits what the thermostat is set at (like single stage), a two-stage furnace keeps running at a lower setting to prevent too much variance in temperature. A modulating furnace is constantly adjusting to keep the temperature consistent. There are also different types of blowers to regulate air flow throughout the house. 


Ductwork is another important consideration. A completely new HVAC system will require new ducts, but even if your home already has ductwork it should be inspected to make sure asbestos wasn't used in the installation and that all the ducts are in good working order.

Air Conditioners

Air conditioners are another important aspect of HVAC systems. Air conditioners work by passing warm air over coils that contain refrigerant. Liquid refrigerant absorbs heat, turns to a gas, cools the air, and then is released outside to the compressor where it's compressed back to a liquid. Since air conditioners all work upon the same principle, you'll mostly want to think about size and efficiency. It's very important to have the AC unit correctly sized to ensure it will properly cool your home without wasting money on a unit that is too large for your home. 


Furnaces and air conditioners both have efficiency ratings. Look for a furnace with at least a 90% efficiency rating. Air conditioners are rated using a Seasonal Energy Efficiency Ratio (SEER) number. The higher the SEER rating, the higher the efficiency. Your best bet is usually to choose an AC between a 14.5 and 17 SEER rating.

Contractor Qualities

When considering HVAC in Kennesaw, make sure you choose a contractor with good references and reviews. In addition, be sure they carry high-quality equipment with good energy ratings. The contractor should come to your home to evaluate your needs and make sure the AC unit is sized correctly. Finally, you should receive a detailed, written estimate that includes the cost of all the parts and labor as well as a time frame for when the work will be completed.