HVAC Services

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Gas Furnaces

Gas furnaces are the perfect solution to your heating. It's a system that gives off powerful heat at a lower price. When combined with your air conditioner and heat pump, you’ll have year-round comfort in your home. We specialize in installing Concord brand gas furnaces, which you can count on to give as much heat as you need without any hassle.

Oil Furnaces

Oil furnaces are great if you need a little extra heat during colder seasons. They tend to last longer, giving you warmth and comfort with minimal maintenance and repairs. We install Concord brand oil furnaces. They are some of the most reliable and energy-efficient furnaces on the market.

Heat Pumps

Heat pumps are safe, quiet, and energy-efficient method of generating heat throughout your home. A heat pump works best when it’s cold. However, when you combine it with a gas furnace and air conditioner, you can maximize it year-round. When buying a heat pump through Complete Air Systems, you’ll have access to a wide selection of reliable and reasonably priced heat pumps. We sell Concord heat pumps that are a reliable heat source for years.

Air Conditioners

As you all know, summer in Ohio can be hot. We’ll help you find an air conditioning unit that will keep you cool even during the warmest parts of the year. We sell Concord air conditioners, which provide a reliable and energy-efficient source of cool air for your home.

Water Heaters

If you need a new water heater or replace your old one, we’ll help you find the right water heater for your needs and budget. We sell a wide selection of water heaters, and they are available in various sizes and price ranges. There will be plenty of hot water for cooking, bathing, washing dishes, and anything else you need.

Air Purifiers

Invest in an air purifier to rid the air of dust, germs, pet dander, and other contaminants. The right air purifier will remove almost all airborne contaminants, allowing you and your loved ones to breathe in clean, healthy air. We specialize in selling Aprilaire air purifiers, which will clean the air around you.


Fight dry air in your home by buying a new humidifier. We primarily sell and install Aprilaire brand humidifiers. Your new humidifier will prevent dry air and allow you to feel more comfortable at a lower temperature. This allows you to save money on heating costs.


We highly recommend purchasing a Honeywell thermostat. The Honeywell thermostat streamlines control of your heating and cooling in one easy to use control.

Honeywell is well-known for making a wide variety of thermostats. There are classic systems that offer hassle-free settings and controls. They also offer state-of-the-art WiFi-compatible systems. You’ll be sure to find a thermostat that fits your needs and lifestyle. We even carry thermostats that you can install in your garage or other outside building.

Carbon Monoxide Detectors

Carbon monoxide is known as the “silent killer.” Carbon monoxide is undetectable by the naked eye but can still poison people if left untreated. Getting a carbon monoxide alarm can check CO levels over time and make you aware when your home has a dangerous CO level in the air. Our alarms are reliable and can easily install in any part of your home, so you and your loved ones can stay safe.


Sunbury, OH

Working Hours

08:00 AM - 05:00 PM
Monday - Friday

24 Hour Emergency Services Available 

Phone Number

(740) 345-2021

Service Areas

Our coverage area includes Central OH including Sunbury, Galena, Westerville, and New Albany.