Do you need furnace services? Call Green Air Technologies today!

Green Air Technologies is your local furnace preventative maintenance expert. Give our team a call when you need to get your furnace ready for winter!

Green Air Technologies provides furnace repair, replacement and new installation services as well. Get in touch with us today to get the furnace services you need.

Armstrong Air Furnaces

Click the Armstrong Air or Ducane logo to learn about the furnaces we install.

We're Your Furnace Experts

Preventative Maintenance

Green Air Technologies provides preventative maintenance for furnaces that we install. Pre-season service is crucial to keep your system running year after year.

Do you need preventative maintenance for your furnace? Call Green Air Technologies today.

Our furnace preventative maintenance visits include a furnace system inspection and safety check, discount on repairs and new furnaces, and no overtime charges.

Furnace Repair

When your furnace isn't running efficiently or reliably call your local furnace repair experts at Green Air Technologies

Our team of furnace specialists can take care of any repair your system needs.

Is your furnace breaking down? Call Green Air Technologies today to schedule the furnace repair you need.

If your furnace is old and not very efficient we suggest replacing your outdated furnace with a high-efficiency Armstrong Air or Ducane Furnace.

Furnace Replacement & New Installations

Old inefficient and unreliable furnaces cost a fortune to keep running winter after winter.

Get a new furnace from Armstrong Air or Ducane and start saving on your heating cost.

A good way to prevent repair costs from adding up is to replace your old furnace with a high-efficiency and incredibly reliable furnace from Armstrong Air or Ducane.

97% AFUE


  • 97% AFUE Efficiency Rating
  • Modulating Heat
  • Comfort Sync Compatible
  • ENERGY STAR® Most Efficient 2013
Provides superior comfort over traditional single- stage and two-stage products, further reducing temperature swings in your home.

96% AFUE


  • 96% AFUE Efficiency Rating
  • Two-Stage Heating
  • Variable Speed Fan Motor
  • Comfort Sync Compatible
Rather than being “all on” or “all off,” your furnace can adjust its heat output based on conditions inside and outside your home. So you use less energy to maintain comfort.

24/7 Emergency Service

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25 Total Reviews /files//gat-logo.png219-229-9048$4687 n 700 w, Michigan City IN

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