Expert Air Conditioning Services in Washington, Frederick, Franklin, & Berkely Counties

Larry & Sons has been keeping homes in Maryland, Pennsylvania, and West Virginia cool and comfortable since 1960. From new AC installations to emergency repairs, ductless systems to indoor air quality solutions. Our licensed technicians deliver reliable service backed by a lifetime guarantee.

Schedule air conditioning services in Maryland, Pennsylvania, or West Virginia by calling our team now!

Air Conditioning Services

With over 65 years of service experience under our belt, our team is capable of installing and servicing a broad range of cooling systems.

AC Installation

Whether you’re building a new home or upgrading an outdated system, our team will help you choose and install the right cooling system for your space and budget.

AC Repair

Strange noises, warm air, or a system that won’t turn on? Our technicians provide 24/7 emergency AC repair to get your comfort restored fast.

AC Maintenance

Preventative air conditioner tune-ups keep your system running efficiently, extend its lifespan, and help you avoid costly breakdowns during the hottest months.

Join our Ultimate Service Agreement Maintenance Program. Through this program, members enjoy an annual AC tune-up and exclusive benefits like priority service scheduling and discounted service.

AC Replacement

If your air conditioner is 10 to 15 years old, frequently needs repairs, or can’t keep up with demand, it may be time for a cooling system replacement. We’ll guide you through your options.

Ductless AC

Ductless mini-split systems offer flexible, energy-efficient cooling for homes without existing ductwork, room additions, or hard-to-cool spaces.

Have an emergency that can't wait? Call Now! (301) 733-5428
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Ductwork, Thermostats & Zoning

Your air conditioner is only as good as the system supporting it. Leaky ducts, outdated thermostats, and single-zone setups can all undermine your comfort and drive up energy bills. These services help you get the most out of your cooling system.

Ductwork Repair & Replacement

Damaged or poorly connected ducts can waste energy and reduce airflow. Our team inspects, repairs, and replaces air ducts to ensure peak HVAC performance.

Duct Sealing

Leaky ducts can account for significant energy loss. Professional duct sealing ensures conditioned air reaches every room efficiently.

Thermostat Upgrades

Upgrade to a programmable or smart thermostat to gain better control over your cooling, reduce energy costs, and improve day-to-day comfort.

Zoned HVAC System Installation

HVAC zoning systems let you control temperatures room by room, eliminating hot spots and reducing energy waste throughout your home.

Have an emergency that can't wait? Call Now! (301) 733-5428
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Indoor Air Quality Solutions

Cooling your home is only half the equation. The quality of your indoor air impacts your family’s health, comfort, and well-being. Larry & Sons offers a full suite of indoor air quality products and services that integrate seamlessly with your AC system.

Air Cleaners

Whole-home air cleaners capture dust, allergens, and pollutants for cleaner, healthier air throughout your home.

Dehumidifiers

Excess humidity makes your home feel warmer and encourages mold growth. A whole-home dehumidifier works alongside your AC for balanced comfort.

Humidifiers

In drier winter months, a whole-home humidifier prevents dry skin, static electricity, and damage to wood furnishings while improving overall comfort.

UV Air Purifiers

UV germicidal lights installed inside your HVAC system neutralize bacteria, viruses, and mold spores before they circulate through your home.

Home Performance Testing

Not sure where the problem is? Our whole-home performance testing identifies air leaks, insulation gaps, and duct issues that affect comfort and efficiency.

Choose Larry & Sons for AC Services in MD, PA & WV

Larry & Sons has proudly delivered the fast, reliable AC solutions that families have trusted since 1960. We’re committed to providing personalized customer service on every job. With a lifetime repair guarantee and a team of highly trained, uniformed technicians, you can rest assured that you’ll always receive professional, long-lasting solutions that keep your home safe and comfortable when it counts.

Schedule expert air conditioning services by calling Larry & Sons now.

Frequently Asked Questions

We recommend scheduling professional AC maintenance at least once a year, ideally in the spring before the cooling season begins. Regular tune-ups help prevent breakdowns, improve efficiency, and extend the life of your system.
If your system is under 10 years old and the repair cost is minor, a repair is usually the best option. However, if your AC is between 10 and 15 years old, or even older, requires frequent repairs, uses R-22 refrigerant, or your energy bills are climbing, replacement may be more cost-effective in the long run. Our technicians can help you weigh your options.
The right AC size depends on your home’s square footage, insulation, layout, and other factors. An undersized unit won’t cool effectively, while an oversized unit cycles too frequently and wastes energy. Our team performs a load calculation to recommend the right fit.
Ductless systems are ideal for homes without existing ductwork, room additions, or spaces that are hard to cool. They offer zone-by-zone temperature control, high energy efficiency, and a quiet, compact design.
Yes. We provide 24/7 emergency AC repair service across our entire service area. Whether it’s day or night, our team is ready to restore your comfort.
There are several options depending on your concerns: whole-home air cleaners to remove dust and allergens, dehumidifiers to reduce excess moisture, UV purifiers to kill bacteria and mold, and humidifiers to add moisture to dry air. Our home performance testing can also identify specific issues affecting your air quality.
Larry & Sons offers flexible financing on approved credit through Wells Fargo and GreenSky.
Our Reviews

See What Your Neighbors Are Saying.

What a GREAT company! I only had two small jobs. The two ladies I spoke with were so kind and helpful. An electrician arrived within a few hours. He was fantastic, a man who knows his job. Very friendly and knowledgeable. He fixed everything quickly and wore shoe covers in the house. I HIGHLY recommend Larry…

Cathy G.

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Cathy G.

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Dave was great to work with. We called for emergency AC help. He arrived when expected and was very professional. He had everything on his truck to repair the issues and explained what was needed, where we stood with our system, what our options were on proceeding with the next step, and what the costs would…

Bernadette C.

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Bernadette C.

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Larry and Sons was able to schedule a technician out to my residence after scheduling for next day service. They even offered to place me on the waitlist for same day scheduling should any cancellations occur. Lyle Hickey, the technician was very knowledgeable, professional, efficient, and extremely patient during my service call. He diagnosed the issue…

Maya A.

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Maya A.

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I am thrilled with the service Tim Swartz and Larry and Sons provided for our plumbing needs. Tim did a thorough inspection of all the plumbing and found some issues that we can catch early before they become major problems. Tim was very low key and explained everything to a non-plumber girl like me so I…

Pamela R.

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Pamela R.

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The company scheduler was very helpful and got us a same day appointment. Matt, the technician was very prompt and professional and even provided advice on the issue. The price was reasonable even though the technician traveled from Maryland to our home in Martinsburg WV. I would recommend Larry and Sons for plumbing repairs to anyone.

Tomas M.

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Tomas M.

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