Is a 3 ton AC too big for a 1200 sq ft house?

• <div>A 3-ton AC unit is probably too big for a home that’s 1,200 square feet. If you have a 1,200-square-foot home, you likely need a unit that’s somewhere around 1.9 and 2 tons. An AC unit that’s too large will be really inefficient and cost you a lot of extra money on your bills. </div>

How long should my HVAC last?

• <div>With the proper maintenance and repairs, your HVAC can last 15 to 25 years. However, it depends on the type of equipment you have and the average lifespan of each, including:<ul><li><a href="https://www.angi.com/articles/oil-furnace-replacement-cost.htm">Oil furnace</a>: 10–15 years</li><li><a href="https://www.angi.com/articles/common-gas-furnace-prices.htm">Gas furnace</a>: 20–30 years</li><li><a href="https://www.angi.com/articles/how-much-does-boiler-installation-cost.htm">Boiler</a>: 20–35 years</li><li><a href="https://www.angi.com/articles/how-much-does-installing-new-ac-cost.htm">AC unit</a>: 7–20 years (location dependent)</li><li><a href="https://www.angi.com/articles/heat-pump-systems-explained.htm">Heat pump</a>: 10–20 years</li><li><a href="https://www.angi.com/articles/how-ductless-mini-split-heat-pump-works.htm">Ductless mini-split</a>: 10–30 years</li></ul></div>

Can you add central air to an older home?

• <div>It is possible to add air conditioning to an older home, but it can be very expensive to do so. Expect to pay anywhere from $6,000 to $17,000 or more for the ductwork and AC unit. You’ll also have to hack into the home’s walls and ceilings to add ductwork, which can impact the aesthetics of an old home.</div>

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TRUSTED BY KENNEDY, PA HOMEOWNERS

4.2
Average homeowner rating
46
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Verified Reviews for Heating And Air Conditioning Service pros in Kennedy, PA

*The Angi rating for Heating And Air Conditioning Service companies in Kennedy, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Kennedy, PA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on November 09, 2025

Reviewed in January 2025
Otto is excellent. He came out to replace my water heater. He is reasonably priced, professional and easy to talk to. I will definitely be calling him back when I am ready for more work that needs done.
Pipe & Power
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Reviewed in August 2024
Dominic Noble was excellent to install our new furnace and air conditioning system. He was very professional and wonderful to talk to. He was very competitive with his prices and took pride in doing the work to the highest standards. I would highly recommend him to others.
Noble Heating and Cooling, LLC
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Reviewed in June 2024
Matt installed a new ac for us in a very timely manner. He got us a bid the same day he came out to look at our old unit. The install was quick and seamless. Good price, quality work. I definitely recommend him for all of our family and friends.
Stadelman Service and Installation
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Reviewed in January 2024
charged 500.00 labor for 1 hour and 20 minutes of simple installaion/replacement of water heater.
Cummings Plumbing & Excavating
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Reviewed in July 2022
He was a very nice you man. He found the problem quickly and and the work was done quickly. He came on a very hot Saturday afternoon. I was very happy with the work. and that I got the Air conditioning was fixed!
Hammer Heating & Air Conditioning
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Reviewed in August 2016
I would highly recommend Gosnell Heating for any residential heating or cooling system install or maintenance. Todd Gosnell installed my HVAC system in my home back in 2013, and has returned for annual check-ups since then. They are professional, responsive and very cost competitive- if you are...
GOSNELL HEATING
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Reviewed in September 2014
As above. A new electric furnace was installed, along with an air conditioner additional duct work and pipes had to be replaced and extended to the back bedrooms. Jay and fellow workers went out of their way to make sure we were satisfied with the work and met our needs. They were...
Jed Heating & Cooling Inc
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Reviewed in April 2013
They were very professional and easy to work with. They were here every day at the same time, and worked continuously until the whole job was done. They installed the air conditioning system in the attic, ductwork from the attic down through closets, installing air conditioning vents in the...
BUCHANAN-SUSICK HEATING & AC
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Reviewed in May 2012
Once when we had not moved in yet, we came to see how things were going and had no hot water. He came at 10 pm at night to fix the water heater. Extremely satisfied with his work.
Savage Plumbing and Heating
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Reviewed in July 2011
My AC unit stopped working and I had called a company that I saw advertised on TV. The company that came out first, the one from TV, said the AC unit was too old and wasn't repairable and needed replaced. I then called Gillock Heating and AC. They not only came the same day that I called,...
GILLOCK HEATING & AIR COND
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Find Heating and air conditioning pros in Kennedy

PC Heating & Cooling

4.68(

)

•Approved Pro

PC Heating & Cooling

4.68(

)

•Approved Pro

Customers say: Quality work

78 local quotes requested

14 years of experience

Our mission at PC Heating & Cooling, is to continue the growth of our business by doing right by all our clients. We love seeing that one of a kind smile on a home owners face at the end of a project! PC Heating & Cooling stacks up with the competition and surpasses it with competitive prices, second to none workmanship and a prompt/responsive team! We give you quality that you can measure, and a finished product that will enhance your home forever. From winter's chill through the dog days of summer, we will keep your home comfortable for you and your family. But, that's just the beginning. We also offer you peace of mind, ensuring your equipment operates safely. We help you save money on your fuel bills, and, we help deliver relief to those with allergies and many others concerned with the quality of the air they breathe.

"I was very impressed with the quality of work he provided, and explained in detail the work he had done to my unit. He was very respectable and professional.. I definitely will be recommending his company to family and friends "

Mary M on April 2025

"I was very impressed with the quality of work he provided, and explained in detail the work he had done to my unit. He was very respectable and professional.. I definitely will be recommending his company to family and friends "

Mary M on April 2025

HVAC-DR

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HVAC-DR

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Free onsite estimate

Mass Mechanical Company Inc., was founded by Rick Emberley Jr., in 1985 out of Waltham, Massachusetts. Since then we have expanded our territory DBA Hvac-Dr to Vermont, New York, Pennsylvania, and headquartered in New Hampshire. We specialize in custom home residential and commercial installation and service of High Efficiency Boilers, Air and Water Source Heat Pumps, Mini-Splits, Multi-Zone Ducting, Indoor Air Quality, High Velocity, In-Floor and Slab Radiant, as well as Conventional A/C and Heat applications. Serving Southern Tier, Finger Lakes, and surrounding areas

TD ENERGY EXPERTS, LLC

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TD ENERGY EXPERTS, LLC

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7 years of experience

TD Energy Experts, LLC. is a full service Mitsubishi Ductless Heating and Cooling Diamond Contractor. With TD all of our customers receive a 12 yr Compressor/Parts and 12 yr labor warranty. That's one reason our customers choose to do business with us "Why settle for a field goal when you get a TD with TD Energy Experts"!

Gater Mechanical LLC

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Gater Mechanical LLC

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Free onsite estimate

Gater Mechanical LLC is a reliable and professional HVAC Contractor in Newville, PA. If you need HVAC Repair or any other HVAC Service, this is your company ! Visit our website or call us now at (717) 696-6087 ! Bloserville, PA; Entlerville, PA;Plainfield, PA; Carlisle, PA; Newville,PA

American Home Guard Home Warranty

5.00(

)

American Home Guard Home Warranty

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

American Home Guard is America’s top rated home warranty provider. They service home buyers and sellers across the nation.They offer home warranty service plans for single family homes, multiple units, condos, and even mobile and manufactured homes. They are proud to offer their referral and realtor programs as well as enticing rates to multiple property owners.

Raker Builders Co

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Raker Builders Co

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30 years of experience

Full Service Contractor

ADDTL ADDRESS: PO BOX 39, CHAMBERSBURG, PA 17201.

"THE WORST COMPANY I have ever delt with. The repair lasted for 17 days and then they refused to come out and fix the problem on a system they had installed that would have still been under warranty if I was the original owner. I told them I wasn't going to pay so the charged an old credit card on file. STAY AWAY FROM THIS COMPANY !!!"

Chris D on April 2025

ADDTL ADDRESS: PO BOX 39, CHAMBERSBURG, PA 17201.

"THE WORST COMPANY I have ever delt with. The repair lasted for 17 days and then they refused to come out and fix the problem on a system they had installed that would have still been under warranty if I was the original owner. I told them I wasn't going to pay so the charged an old credit card on file. STAY AWAY FROM THIS COMPANY !!!"

Chris D on April 2025

Abma's Heating & Cooling

1.00(

)

Abma's Heating & Cooling

1.00(

)

Free onsite estimate

We are a one-stop destination for all your heating and cooling requirements. From installation and repair to maintenance and replacement, you can depend on us for all your heating and cooling needs. Offering everything under one roof makes it possible for you to depend on us for all your heating and cooling needs. We strive to exceed the expectations of our clients by working with integrity, competence, and objectivity, and want to emerge as the benchmark for heating and cooling services We specialize in everything from repair to new installation and are a one-stop service provider for all your heating and cooling needs.

"We had Abma come out to fix our AC unit this summer. They charged us over $400 to get it running. A week later the unit stopped working again. They came back out to look at it and said the unit needed to be replaced. Now, four months later, we get a $90 bill for the second visit. After talking to them, there was no compromise on the second charge. Horrible customer service."

Thomas N on November 2021

"We had Abma come out to fix our AC unit this summer. They charged us over $400 to get it running. A week later the unit stopped working again. They came back out to look at it and said the unit needed to be replaced. Now, four months later, we get a $90 bill for the second visit. After talking to them, there was no compromise on the second charge. Horrible customer service."

Thomas N on November 2021

Sever HVAC & Mechanical

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Sever HVAC & Mechanical

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HVAC Contractor, HVAC Repair, Furnace Replacement, Heating & Cooling , Air Conditioning Repair

...

Showing 1-10 of 79

Heating and Air Conditioning questions, answered by experts

Unfortunately, a freon leak will persist even when your AC unit is off. The freon in the AC unit is under pressure no matter the status of the system, so it will continue to drip through the leak even when you shut off the entire unit. It will continue to leak freon until it’s completely empty.

A 3-ton AC unit is probably too big for a home that’s 1,200 square feet. If you have a 1,200-square-foot home, you likely need a unit that’s somewhere around 1.9 and 2 tons. An AC unit that’s too large will be really inefficient and cost you a lot of extra money on your bills.

In many cases, replacing the entire AC system is a better investment than replacing a condenser or evaporator coil, as the labor and part prices can add up to a significant portion of the cost for a new system. Consult a licensed HVAC technician for an accurate diagnosis and recommendation.

With the proper maintenance and repairs, your HVAC can last 15 to 25 years. However, it depends on the type of equipment you have and the average lifespan of each, including:

Oil furnace: 10–15 years
Gas furnace: 20–30 years
Boiler: 20–35 years
AC unit: 7–20 years (location dependent)
Heat pump: 10–20 years
Ductless mini-split: 10–30 years

It is possible to add air conditioning to an older home, but it can be very expensive to do so. Expect to pay anywhere from $6,000 to $17,000 or more for the ductwork and AC unit. You’ll also have to hack into the home’s walls and ceilings to add ductwork, which can impact the aesthetics of an old home.

The Kennedy, PA 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.

See all articles

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How Much Does It Cost to Replace an AC Condenser? [2025 Data]
If you’re having problems with your air conditioner’s condenser, it may be time for an upgrade. Learn about the cost to replace an AC condenser in this guide.
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Rooftop AC Units: How Do They Work and Are They Worth It?
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Oct 31, 2025Oct 31, 2025
How to Know If You Should Repair or Replace Your Furnace
Not sure if you should repair or replace your furnace? Don’t waste money! Use this guide first to decide on the best strategy for you and your system.
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Do Dehumidifiers Prevent Mold?
Humidity and moisture provide the ideal breeding ground for mold and mildew. Here’s how a dehumidifier prevents mold—and what else you can do to keep it at bay.