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    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Greenwich - Updated Nov 2026

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 Greenwich, 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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35 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for ZEL Electric
ZEL Electric
New to Angi
Electrical Baseboard or Wall Heater - InstallElectrical Baseboard or Wall Heater - RepairThermostat - Install or Replace

Serving Greenwich, OH and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

⚡ Welcome to ZEL ELECTRIC ⚡\n\nWe’re a licensed & insured electrical contractor proudly serving Medina County and surrounding areas.\n\nFrom service upgrades and panel work to lighting, EV chargers, and residential or commercial electrical projects, we focus on clean, safe, and code-compliant work done right the first time.\n\n📞 Call or message us for a free estimate\n216-318-3381\n\n⚡ Driven by Energy. Built on Trust.

Barn wire
Barn wire
Jalen Alonzo
New to Angi
Thermostat - Install or Replace

Serving Greenwich, OH and surrounding areas

Approved

Reliable and affordable electrical services for residential and small commercial projects. I specialize in troubleshooting, repairs, installations, lighting upgrades, outlets, panel work, and more. With a focus on safety, quality workmanship, and honest pricing, I make sure every job is done right the first time. Whether it’s a quick fix or a full upgrade, you can count on dependable service and clear communication from start to finish.

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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.

While personal preferences widely vary, sleep experts say the best temperature for sleeping is between 60 and 67 degrees Fahrenheit rather than 78. If you do choose to sleep with your AC unit tuned to 78 degrees, you might want to use only a sheet or light blanket rather than a comforter. You might also consider installing a window unit in your bedroom so that you can be cooler in bed without wasting energy cooling the whole house.

If you’re looking for a portable, budget-friendly cooling solution that doesn’t require any venting or installation, a ventless AC system is a good option. Similarly, this is a great choice if you’re renting an apartment or home and aren’t allowed to make large, structural changes like installing comprehensive HVAC, or you’re in a shared space and only need to cool your own room.

An air conditioner’s watt usage depends on multiple factors, including the type of AC unit, its size, and how often you use it. With that said, most central air conditioners consume between 3,000 and 3,500 watts. Meanwhile, window AC units use 900 to 1,400 watts, and portable air conditioners consume 2,900 to 4,100 watts.

ACs don't run on water. They're not connected to drain pipes or any part of your plumbing system. However, they need refrigerant to run. Refrigerant is a gas or liquid that has a low boiling point and absorbs the heat in your home. ACs need this in order to be functional and cool your home. If you suspect your AC is low on refrigerant, you need to contact a licensed HVAC professional. Refrigerant is a dangerous chemical that requires specialized training and permits to work with. 

The Greenwich, 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.