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TRUSTED BY DERRY, PA HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon28
    Verified heating and air conditioning services reviews

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

Avatar for Alex’s handyman services
Alex’s handyman services
New to Angi
Central A/C - Service or RepairHeat Pump - Install or Replace

Serving Derry, PA and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

I have 8+ years experience in the heating and air conditioning field. I’m very mechanically inclined, therefore I’m quite useful to do just about anything. I’ve done everything from general around the house stuff to full scale renovation work. I would be my pleasure to do any work for you!

Curlys Mechanical
New to Angi
Central A/C - Service or Repair

Serving Derry, PA and surrounding areas

Approved

In business since 2025

Free estimates

Credit card accepted

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship, and complete customer satisfaction, from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large, or small the job. Call us today!

2 neighbors recently requested a quote
Avatar for Clark Kleaning Company
Clark Kleaning Company
New to Angi
Air Ducts & Vents - Clean

Serving Derry, PA and surrounding areas

Approved

Free estimates

Warranties offered

Small jobs welcome

\n\nJermaine & Eric’s Cleaning Co. is the team that turns “just clean” into seriously spotless. Built on teamwork, trust, and a hustle-first mindset, we deliver top-tier residential and commercial cleaning with consistency you can count on. From everyday tidy-ups to full deep-clean transformations, we bring shine, precision, and professionalism to every space we touch.\n\nThis isn’t just cleaning —\nit’s clarity, comfort, and confidence… delivered by two guys who take real pride in the cleanliness next to godliness

Avatar for Giant Plumbing, Heating, and Cooling
Giant Plumbing, Heating, and Cooling
4.8(
61
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+47 more

Serving Derry, PA and surrounding areas

In business since 2002

Free estimates

Emergency services offered

"Will and Rob showed up at the house and the appointed time and started right at it. The old a/c, furnace,duct work, wiring, and gas line were gone in no time. When they started the install, took their time to get everything perfect. Constantly checking for level and plum of all units, ducts, plumbing, and even wiring. Explained what was going on and why they were doing what they were doing. Both Will and Rob very friendly and extremely knowledgeable about HVAC. I worked in the plumbing wholesale for 20 years, so I know a bit about was going on. The new technology is amazing. They installed a 96 percent efficient furnace with a 16 seer a/c unit by Amana. Came with a lifetime warranty on the a/c compressor and furnace heat exchanger, the two main components.
They did an excellent job. All the old units were taken away and site was completely cleaned cleaner than before they started. Will even filled out the rebate form from the electric company for me.
I will definitely hire Giant again and again!
"
Recommended by96%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

DIY is possible for basic cleaning. Professional services handle advanced maintenance like recharging the refrigerant.

Yes, you can run an attic fan with the AC on. In fact, you don’t have a choice with a passive attic fan. Plus, when an attic fan draws out hot air from the attic, it helps regulate the temperature of your whole home, so your AC doesn't have to work as hard.

For washable or electrostatic air conditioner filters, you can soak and rinse them with water. If you rinse the filter with water, make sure to use a faucet, shower head, or garden hose with a gentle water pressure setting, as strong water pressure could damage the filter.

But for disposable filters, water could ruin the filter, even allowing mold to grow in the filter. Instead, these filters should be replaced.

Running an air conditioner with mold is not safe because it can spread harmful mold spores throughout your home. Exposure to these spores can trigger various health problems, including respiratory issues, allergies, coughing, wheezing, sneezing, itchy eyes, and a sore throat. It may also aggravate asthma in household members. Continued exposure can increase the risk of more serious illnesses like sinus infections, pneumonia, and bronchitis. If you suspect mold in your air conditioner, you should stop using the system until it has been properly cleaned to avoid health risks and further contamination.

Yes, high-efficiency models reduce environmental impact with lower energy use.

The Derry, 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.