How do you know if your HVAC system is up to code? What codes are there that pertain to your system, what do they mean, and how can you be sure you’re in compliance? Here’s what to look for.

  • Efficiency rating. An AC or heat pump in Indiana must have a minimum SEER rating of 14. A gas furnace or boiler must have an AFUE rating of at least 80%. If you have an older system that doesn’t measure up, consider upgrading to reduce your energy bills.
  • Refrigerant. If your AC was made before 2010, it may still use R-22 refrigerant. Proving detrimental to the environment, it was gradually phased out and finally abolished in 2020, replaced with R-410A and other, less harmful coolants. If your system still uses R-22, you should replace it as soon as possible so your unit stays up to code.
  • Sizing. To ensure your system is up to code, it must be properly sized. A system that’s too big or too small won’t function properly and can even become damaged. Make sure your contractor uses Manual J to determine the correct-size HVAC unit for your home.
  • Ductwork. Just as your system must be the correct size, your ductwork must be as well. If it’s too small or too big, it can hinder airflow, which wastes energy and damages the system. Before installation, have your HVAC technician check to ensure healthy ductwork.
  • Location. Your unit should be placed somewhere out of the way while still easily accessible to your HVAC technician for maintenance and repairs. Your attic or basement are both good options, or if you have a utility closet, that works as well.
  • Matching. For your AC or heat pump, the indoor and outdoor units must be compatible. They’re usually installed together, but if one needs to be replaced and the other doesn’t, a unit that doesn’t match its counterpart causes pressure imbalances in the refrigerant, which keep the system from working properly.

To ensure your HVAC installation is up to code, contact us at Mowery Heating, Cooling and Plumbing. We keep Indianapolis homes comfortable and efficient throughout the year.