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    Average homeowner rating
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Top-Rated Heating and air conditioning pros in Castalia - Updated Nov 2026

Efficient heating and cooling
5.0(
2
)
Geothermal Heating or Cooling System - Service

Serving Castalia, OH and surrounding areas

Approved

13 years experience, we install furnaces, a/c systems and ductless systems. 10 yr warranties on all equipment. We also offer a/c tune ups which consist of cleaning outdoor condenser and all checking refrigerant charge on your system. We also offer a complimentary air filter change with this service. Don't wait until its hot to make sure your system will operate properly.

Upper bedroom
Clean
Finished
Cassette
Cracked heat exchager

+3

Avatar for Great Lakes Electric
Great Lakes Electric
4.5(
24
)
Gas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - RepairCentral A/C - Install+13 more

Serving Castalia, OH and surrounding areas

Approved

In business since 1997

Free estimates

Credit card accepted

Proudly serving Erie and Huron Counties since 1996.\n\nFor 30 years, Great Lakes Electric has been a trusted provider of electrical services throughout North Central Ohio. We take pride in delivering safe, reliable, and high-quality workmanship for homeowners and businesses alike.\n\nOur team of skilled, trained electricians specializes in residential and commercial electrical services, HVAC, generators, home lighting, and more. We are committed to completing every project safely, on time, and within budget.\n\nBuilt on a foundation of quality workmanship, dependable service, and lasting customer relationships, Great Lakes Electric is proud to serve the communities where we live and work.\n\nAll of our work is backed by a 100% satisfaction guarantee.

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+3

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Heating and Air Conditioning FAQs, answered by experts

There are two main reasons your furnace and AC are turning on at the same time. The first could be that you’re confusing the furnace with the blower. The blower is located in the furnace and will turn on to distribute cool air from the air conditioner through the ductwork in the home. This is normal. If the actual furnace is turning on at the same time as the AC and hot and cool air are coming into the home, it could be a result of incorrect writing to a new thermostat or new systems.

Set your house temperature between 55 and 85 degrees Fahrenheit while on vacation, depending on the season. If it’s winter, don’t go below 55 degrees. In the summer, the best AC temperature for energy savings is no higher than 85 degrees. You can save anywhere from 10% to 15% on your energy costs by adjusting the temperature while you’re away. If you have a smart thermostat, set up vacation modes for each season. On your way home, turn off vacation mode to allow the home to warm up or cool down before you arrive.

Replacing an HVAC system does not always include new ductwork. The decision depends on the condition of your existing ducts. If they are in good shape, correctly sized for the new unit, and meet current standards, they can often be reused. However, if the ducts are damaged, poorly designed, or improperly sized, they will likely need to be replaced or upgraded to ensure the new system operates efficiently. An HVAC contractor will assess your ductwork and recommend the best course of action. Typically, ductwork is purchased separately, and a full replacement will add to the overall project cost.

There are several common types of HVAC systems that you may have, including split systems, hybrid HVAC, duct-free systems, packaged heating and air, geothermal heating, or even portable units for heating or cooling. If you aren’t sure which type is in your home or are looking to install something different, you should consult an HVAC pro to determine which option is right for your heating and cooling needs.

While spending money once or twice a year to tuneup your AC and furnace might seem like a waste of money, think again. The cost of HVAC maintenance is far less than the cost of replacing your furnace or AC unit, regardless of the type of HVAC system you have. Paying this smaller fee now will help you avoid paying much more significant costs in the future. Not to mention, having a serviced AC and heating system will help keep your home comfortable, no matter the season. 

The Castalia, OH homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.