Homeowner Maintenance and Responsibilities

1- AC Filters

Gregg Cowan H & A recommends changing your air filters every 30 days for the 1st year of living in your home. Depending on high traffic, pets, allergies, will determine if changing 60-90 days should be recommended.

2- Drain Lines

In addition to cooling your home, an air conditioner removes moisture from the air to lower the humidity level inside your house. This excess condensed water is removed from the AC unit through a small drainpipe and deposited outside on the ground.
  • Over time algae, mold, and mildew can build up inside the condensation drain line and form a clog, causing water to back up and overflow inside the air conditioner unit. To prevent this from happening, pour a cup of bleach in the access opening in the drain line near the AC unit to kill any algae, mold, or mildew that has formed in the pipe. This is recommended once a year.

3- Filter Sizes

Air Filter Sizes vary based on Manufacture and Size of Unit. Please check the size of filter needed prior to changing out each month to ensure that you have the correct filter. Sizes that Gregg Cowan H & A uses are:
16x20x1 16 3/8x21 ½x1 19 7/8x21 ½x1 20x20x1
****What your heating and air company offers****
Gregg Cowan Heating & Air offers routine preventative maintenance to ensure that the system is operating at its peak efficiency and to help identify potential problems before they occur. The preventative maintenance service agreement covers 2 visits a year and is offered to homeowners for the investment price of $170 for the first unit, and $95 each additional unit. The maintenance service agreement is an addition to the 1-year workmanship (provided by the builder) and cost of the agreement will be the homeowner’s responsibility. This service agreement will help you maintain your HVAC system:

Air Conditioning System – Spring

Replace filters at no additional charge, oil motors, check refrigeration charge to include head and suction pressures, check compressor current (amps), check operating controls.

Heating – Fall

Replace filters at no additional charge, check belts, check and adjust burners for smooth and correct flame, check piolet safety, check thermocouple, check fan and limit switches, inspect heat exchanger for cracks, check flue and draft diverter for proper draw, and check humidifier. For more information regarding a maintenance service agreement for your HVAC system, please contact Gregg Cowan Heating and Air at 770-787-6952.


Your HVAC furnace that houses your air filters will be in your attic space. Based on square footage of the home, some homes have 1 furnace and others may have 2 furnaces.


Locate the handle in front of the furnace that looks a drawer front.


Below the drawer front will be a metal clip below the handle that you will press while pulling the handle to open.

Step 4

Pull handle to access the dirty air filter.

Step 5

Take out dirty filter and replace with new filter.
Air flow arrow should be pointing in the
direction of the furnace.