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Mullen Heating and Air Conditioning
4.6(
205
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+3 more

Serving Harmony, PA and surrounding areas

Approved

In business since 1988

Emergency services offered

Warranties offered

"John stopped one day to quote us a price, we arranged for the work and a few days later our new furnace and AC units were installed. John's helper arrived promptly, removed our old furnace and AC unit and installed the new one along with a new air cleaner, new thermostat and all new piping. The job was competed professionally and in one day. And everything was cleaned up before he left. We did have one small issue with a leaky condensate drain pipe which was quickly remedied the same day we discovered it. I would recommend John Mullen Home Repair to anyone. The best part is that he is a local business and we were really pleased with to deal with someone local."
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Response time2 days
Response rate100%
11 neighbors recently requested a quote
Avatar for Air Systems Mechanical Contracting, Inc.
Air Systems Mechanical Contracting, Inc.
4.6(
54
)
Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Harmony, PA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

"I have had air systems mechanical install my high efficiency furnace few years ago and recently install my central air. Their prices are lower than the rest. They are always courteous and professional from salesman to office staff. I have nothing negative to say. Always on time for routine furnace tune up appointments. A great company to deal with."
Williamson Upflow Oil Furnace
18 SEER American Standard A/C
American Standard TAM4 Air Handler
Rheem Tankless Water Heater
Williamson Condensing Boiler Installation

+12

Response time11 hrs
Response rate86%
4 neighbors recently requested a quote
Avatar for Aire Serv of Sewickley
Aire Serv of Sewickley
4.8(
22
)
Central A/C - InstallDuctless Mini-split A/C - Install or Replace

Serving Harmony, PA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

At Aire Serv® of Sewickley, PA, heating and air conditioning services are our specialty. Our friendly and knowledgeable service professionals are happy to answer any questions you may have and recommend the best service options for you.\n\nAire Serv ® is your trusted partner for reliable commercial HVAC services that keep your business operating comfortably and efficiently. From routine maintenance to urgent repairs, our experienced professionals deliver cost-effective solutions tailored to your space and schedule—minimizing downtime so you can stay focused on running your business.\n\n

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28 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Aire Serv of Sewickley
Aire Serv of Sewickley
4.8(
22
)
Air Ducts & Vents - CleanCentral A/C - Service or Repair

Serving Harmony, PA and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

In the middle of July, when the thermometer is pushing past 100 degrees Fahrenheit, air conditioning isn't a luxury that's nice to have in Pittsburgh—it's an absolute necessity that you don't want to live without. It's obviously a disaster when your air conditioner grinds to a halt on the hottest day of the year. But it's also incredibly frustrating to deal with an AC unit that only "kind of" works and is struggling to get your house down to the temperature on your thermostat or control humidity levels. When you notice those types of annoying issues, it's necessary to get professional Pittsburgh air conditioner repair services before the problem worsens and you're left sweltering in an overheated house.

Gallery
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Bactronix Corp
Bactronix Corp
4.9(
495
)
Air Ducts & Vents - Clean

Serving Harmony, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"I had the crew of Glenn, Brenden &Josiah to clean my air ducts. They were very clean and efficient. They explained everything and pointed out mistakes in the construction of my ducts with cold air returns. They also left information for UV purifier for my son’s allergies to review. I liked the fact that the work was hospital grade."
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+19

Response time1 day
7 neighbors recently requested a quote
Recommended by81%of homeowners
Avatar for MRT Contracting LLC
MRT Contracting LLC
5.0(
9
)
Central A/C - Install - For Business

Serving Harmony, PA and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"I COULDN'T AFFORD TO BUY A NEW FURNACE. I'AM A DISABILED VETERAN. LIVING ON A FIXED INCOME. MY FURNACE WENT OUT . I GOT ON LINE TO GET SOME ESTIMITS. THE CHEAPEST I COULD FIND WAS 6000.00JOHN TO OWNER OF MRT HVAC CONTRATORS.CALLED ME.I TOLD HIM MY PROBLEM. IT'S ABOUT TO GET COLD AND WE HAVE NO HEAT.JOHN SAID DON'T WORRIE I WILL HELP YOU OUT .JOHN GOT WITH DON [Provider Name Removed] A FREIND OF HIS. AND THEY DONATED US A BRAND NEW FURANCE OUT THE BOX.TO ME AND MY WIFE.PLUS INSTALLED IT FOR FREE.THERE ARE SOME GOOD PEOPLE IN THE WORLD AND JOHN LUGAILA& DON [Provider Name Removed] ARE THOSE GOOD HEARTED PEOPLE. GOD BLESS THEM. AND ME THE WIFE AND DOG THANK THEM WITH ALL OF OUR HEARTS"
Furnace Replacement
AC Replacement
AC Replacement
AC Replacement
AC Replacement

+9

Response time1 day
Response rate98%
7 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

You can adjust uneven airflow in your home by adjusting the dampers on the vents. However, if the temperature feels consistent throughout the home, don’t worry too much about uneven airflow. Generally speaking, larger rooms should receive more airflow than smaller rooms, especially if they only have one vent.

Water buildup in your HVAC system is a cause for alarm. If water accumulates in your ductwork, it can drastically lower your home's air quality and create safety hazards. These risks include mold growth, damage to your HVAC system, and attracting pests that are seeking water into your ducts. Proper insulation and sealing of ducts can prevent this, and regular inspection and maintenance can address water damage problems before they become too severe.

If you have central air conditioning, it’s fine to run your AC all day if that’s what you want—as long as the AC unit is in good condition. But if your AC runs constantly when you don’t want it to, there may be a problem with your system (like the ones we’ve mentioned above). Window AC units and wall air conditioners aren’t as powerful as central AC, so you should only run those kinds of air conditioners for eight to 12 hours at a time.

No, not all HVAC systems have a fresh air intake, but there are many advantages to having one. For example, a fresh air intake can boost the air quality inside your home and help your furnace run more effectively. Plus, it can make your house more energy efficient, possibly saving you money on your utility costs.

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.

The Harmony, PA homeowners’ guide to air conditioning services

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