HVAC Services You Can Count On All Year

Choose Haller for HVAC services in Cornwall, and you get repairs, installations, maintenance, and 24/7 emergency service for every type of heating and cooling equipment.

Heating and cooling systems work overtime during Cornwall’s harsh winters and sticky summer months. You deserve a team that arrives promptly, communicates clearly about the problem, and restores your home’s comfort.

Since 1981, we’ve been serving Cornwall families with dependable care for their furnaces, air conditioners, heat pumps, and boilers. Generations of local homeowners have relied on our expertise. With hundreds of vehicles on the road, we reach you quickly.

Emergency Service

HVAC Systems Serviced

Drains Cleared

Years in Business

Trucks on the Road


4.7
Based on 8257 reviews
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Carrier Residential Factory Authorized Dealer
North American Technician Excellence - NATE - Certifying the Finest in HVACR

Cornwall’s Trusted HVAC Service Provider

Your heat fails at midnight? Your AC stops working on Sunday afternoon? We pick up the phone and send out a technician.

Our team is easy to schedule with and easy to reach, so you’re never left waiting or wondering. Every HVAC service in Cornwall is backed by our 100% satisfaction guarantee.

(717) 204-8120


Why Cornwall Homeowners Choose Haller

Your safety is our top priority on every job, from small repairs to full system installations. We follow strict standards and best practices to make sure your home’s systems operate safely and efficiently.

We make scheduling simple and convenient. Call us or book online. Our responsive team keeps you informed every step of the way so you’re never left guessing.

Home emergencies don’t wait. Neither do we. Our 24/7 emergency services give Cornwall homeowners fast, dependable help when it matters most.

We’ve proudly served Central and Eastern Pennsylvania since 1981, bringing decades of experience to every job. From Quentin to Miners Village and surrounding communities, we help homeowners stay comfortable through every season with HVAC solutions built for how people actually live here.

We offer a range of financing options that make it easier to move forward with necessary repairs or system upgrades. With flexible payment solutions, you can improve your home’s comfort without unnecessary financial strain.

Our NATE-certified technicians bring advanced training and proven expertise to every service call. As a BBB Accredited Business and Carrier Factory Authorized Dealer, we meet high standards that give you added confidence in our work.

Our Home Comfort Club provides preventative maintenance, priority scheduling, and exclusive member savings. It’s a proactive way to protect your home’s systems and enjoy greater peace of mind year-round.

Every HVAC job comes with our 100% satisfaction guarantee. Something isn’t right? We come back and fix it.


Our Easy, 3-Step HVAC Scheduling Process

Getting HVAC services in Cornwall with Haller is straightforward and built around your schedule.

Dealing with an urgent issue or planning a home upgrade in Cornwall? We make it easy to get the professional help you need without added stress.

Call us or schedule your appointment online at a time that works best for you. Our friendly team will gather a few details about your home and service needs to make sure we’re fully prepared.

Our licensed technician will arrive on time, assess the situation, and explain your options clearly. We provide honest recommendations and upfront information so you can make a confident decision.

Once you approve the work, we complete the job with a focus on safety, efficiency, and long-term performance. You can relax knowing your service is backed by our 100% satisfaction guarantee.

(717) 204-8120


What Our Customers Are Saying

Learn More About Our 100% Satisfaction Guarantee

4.7
Based on 2435 reviews
Excellent service. I have used Haller for all household needs for over 20 years
Connor was professional, gave options and the price and didnโ€™t pressure. Work was done well, and we appreciated how quickly Haller sent someone out to replace the outside faucet.
Highly recommend, Jonathan was very informative and knowledgeable!
Staff is excellent, prompt, friendly, professional
Fantastic job. Very professional. Would highly recommend Mark when such a task is needed, ie, installation of a new water heater!!
Great service and information.
Stephen arrived on time, inspected our thermostat and furnace and explained what our problem was. He explained everything clearly and made suggestions and quoted prices. He was very transparent both on what needed to be done and cost. He then promptly proceeded to complete the needed work. He was very professional. I am very pleased with Stephen and Haller. I highly recommend their services.
Great overall service!
Appt was scheduled quickly, service man was pleasant and explained clearly what repair needed to be done. I have been a customer for years and will continue to call them. To
Repair that was included in our service contract.
Thank you Colin and Rodrigues for wonderful, prompt, virtuous service. It is awesome to have my hot water back! You two are the best!! ๐Ÿค—
Chris did a great job cleaning both splits. He also explained what could be causing the whirl sound coming from one of them. Gave me a quote for the work so we can plan our budget.
The technician, John Wentz was very efficient, knowledgeable and professional. Highly recommend.
Another great experience with a Haller. Every technician that comes out to service our units is knowledgeable, respectful, and thoughtful. Thanks Nate!
He was very friendly got the job done in a good amount of time.
Mason was very prompt, provided excellent status updates to his arrival, and conducted his work professionally. Thank you Mason!
Austin was very professional today and did a great job! Thank you Austin!
I have been working with Haller for several years for my whole house generator. The techs have been super friendly and informative, which I really respect because I like to know how these things work! Very reasonable prices too! They were also the only service company that I was able to find to work on my generator, because everyone else didnโ€™t want to touch it since they โ€œdidnโ€™t install itโ€โ€ฆ I have no idea who installed mine because it came with the house and the previous owner didnโ€™t leave us that info. Haller has definitely been a life saver for my generator!
Complete HVAC system installation was done flawlessly and efficiently. Consultation and service was professional from the start to end.
Have only experienced fine dealings with everyone at Haller during the seamless process of replacing the old HVAC system and then with each seasonal maintenance check-up. Recently, Jeff performed the winter-to-summer maintenance work. He made this system simple and easy to understand for us, and we appreciate his patience and expertise. Highly recommend Haller Enterprises!
A/C replacement: the installers were courteous and efficient, showed up on time and did a good job
Phil Rathman was great! He was a great help, great to talk to, and went above and beyond to make sure our system was running efficiently. I would highly recommend!
Brian is excellent with my HVAC service
Service is always excellent. Maintenance
James , did a great job . I highly recommend Haller.

Homeowner greeting Haller technician at the door for maintenance

Stay Ahead of HVAC Issues with the Home Comfort Club

Maintaining your HVAC system in Cornwall becomes simple, affordable, and stress-free with the Haller Home Comfort Club. Proactive service and exclusive member benefits help you stay ahead of problems rather than reacting to unexpected breakdowns. Your comfort stays protected throughout the year.

Priority scheduling comes automatically with your Home Comfort Club membership. This matters during Cornwall’s peak heating and cooling demands. During those extreme temperature swings that hit our area, you skip the waiting line for service calls. Members get moved ahead in our schedule whenever we can make it happen. Faster comfort restoration for your home. Your family’s comfort becomes our priority in every way possible.

Routine maintenance is the key to avoiding costly breakdowns and extending the life of your equipment. With scheduled tune-ups included in your membership, we inspect, clean, and optimize your systems for safe and efficient operation. This proactive approach helps catch small issues before they turn into major repairs. You’ll enjoy more reliable performance and improved energy efficiency throughout the year.

Home Comfort Club members receive special discounts on repairs and services, making it easier to manage household maintenance costs. Over time, those savings can add up significantly, especially if unexpected issues arise. You may also gain access to seasonal promotions and member-only offers. It’s a smart investment that delivers value well beyond routine service.

With the Home Comfort Club, you build an ongoing partnership with a team that understands your home’s systems. We keep detailed service records and provide personalized recommendations based on your equipment’s condition and performance. Backed by our commitment to safety and 100% satisfaction guarantee, you can feel confident that your comfort is always protected.

Schedule home system maintenance by calling (717) 204-8120.


Your Choice for Cornwall HVAC Services

Keeping your home comfortable in every season requires heating and cooling solutions you can rely on.

Haller provides expert HVAC services in Cornwall, delivering dependable repairs, energy-efficient installations, and preventative maintenance designed to keep your system running safely and efficiently year-round.

(717) 204-8120

Cooling Icon

Air Conditioning

Pennsylvania’s humidity makes AC failures miserable fast. We keep cooling systems running through the worst of summer.

We service central air conditioners, ductless systems, and heat pumps in cooling mode. Common issues include refrigerant leaks, compressor failures, frozen coils, and electrical problems.

  • AC Repair: Fast AC repair in Cornwall restores comfort quickly when your system isn’t working right.
  • AC Installation: We install high-performance AC systems built for reliable, energy-efficient cooling.
  • AC Maintenance: Professional AC maintenance helps prevent breakdowns and improves efficiency.
  • AC Replacement: Expert AC replacement in Cornwall upgrades your home with modern, energy-efficient cooling.
Furnace

Furnaces

Dependable furnace services keep your Cornwall home warm and safe during winter.

We service and install high-performance furnace systems built to handle Cornwall’s coldest temperatures. Need maintenance, repair, or a full replacement? We make sure your system operates safely and provides consistent heat.

  • Furnace Repair: Prompt furnace repair in Cornwall restores reliable warmth when your system won’t ignite, heats unevenly, or makes unusual noises.
  • Furnace Installation: We guide you through selecting the right furnace for your home. Then we handle installation with precision and care.
  • Furnace Maintenance: Routine furnace maintenance keeps your system running efficiently. It also helps you avoid unexpected breakdowns during the coldest months.
  • Furnace Replacement: Professional furnace replacement in Cornwall improves comfort and lowers energy bills. You’ll get more dependable performance all winter.
Heat Pump

Heat Pumps

Heat pumps handle both heating and cooling. This makes them a practical choice for Cornwall’s changing climate.

Modern cold-climate heat pumps stay efficient even when temperatures drop into the 20s. We install air-source and ground-source systems.

  • Heat Pump Repair: Heat pump repair in Cornwall covers refrigerant issues, defrost cycle problems, reversing valve failures, and compressor diagnostics.
  • Heat Pump Installation: We design and install heat pump systems tailored to your home’s layout and efficiency goals.
  • Heat Pump Maintenance: Routine heat pump maintenance keeps your system running efficiently. It also extends its lifespan through thorough inspections and performance checks.
  • Heat Pump Replacement: Is your heat pump aging or underperforming? Heat pump replacement in Cornwall with a modern system improves comfort and lowers energy costs.
Ductless system

Ductless Mini-splits & VRFS

Ductless mini splits provide flexible, zoned comfort for homes in Cornwall.

They’re perfect for additions, older homes near the Historic Miners Village, or rooms without ductwork. These systems let you control temperatures independently. We install and service ductless systems to improve comfort and efficiency.

  • Ductless Mini-Split Installation: Wall-mounted indoor units connect to an outdoor compressor through refrigerant lines. Much less construction needed compared to adding ductwork.
  • Ductless Mini-Split Repair: If your ductless system isn’t working properly, we’ll diagnose the issue. Then we provide reliable ductless repair in Cornwall to restore efficient heating and cooling.
  • Ductless Mini-Split Maintenance: Regular ductless maintenance keeps your system running at peak efficiency. We clean filters, inspect coils, and check refrigerant levels.
  • Ductless Mini-Split Replacement: When your ductless system is outdated or struggling to keep up, we provide expert ductless replacement in Cornwall with modern, energy-efficient units.
Boiler

Boilers and Radiant Heating

Professional boiler services provide steady, consistent heat for your Cornwall home.

Whether you rely on a traditional or high-efficiency boiler, we handle repairs, maintenance, and installations. Our technicians ensure your system runs safely and efficiently through the winter.

  • Radiant Heating: In-floor and baseboard radiant systems deliver heat without blowing air. No drafts. No dust circulation. We install and repair radiant heating systems in Cornwall homes.
geothermal heating icon

Geothermal

Geothermal heating systems offer sustainable, energy-efficient comfort.

These systems use the earth’s natural energy to provide consistent heating and cooling with lower operating costs. We design and service geothermal solutions near Cornwall for homeowners looking for long-term savings and environmental benefits.

Furnace

Oil-to-Gas Conversions

Converting from oil heat eliminates tank maintenance and often lowers fuel costs.

We handle the full conversion process. We remove old equipment, coordinate gas line work, and install your new furnace or boiler. Many Cornwall homeowners have made the switch as natural gas availability has expanded.

Indoor air quality

Indoor Air Quality Solutions

Dry winter air and humid summers both affect comfort and health in Cornwall homes.

We install whole-house humidifiers, dehumidifiers, air purifiers, and filtration systems that work with your existing HVAC equipment.

Smart Thermostat Icon

Thermostats & Smart Home Devices

The right thermostat reduces energy waste and makes your system easier to control.

We install Wi-Fi thermostats, programmable thermostats, and multi-zone controls. Proper placement and programming make a real difference in efficiency.

Haller Technician Helping customer with Memberships

Other Home Services from Haller

Your heating and cooling system is just one part of what keeps your home running. Haller also provides plumbing, electrical, and indoor air quality services throughout Cornwall. You can work with one team you trust instead of juggling multiple contractors.


Schedule Your Cornwall HVAC Services with Haller Today

Need dependable heating and cooling solutions backed by decades of experience? Haller Enterprises is ready to deliver. From repairs and replacements to maintenance and indoor air quality upgrades, we provide the complete services Cornwall homeowners trust.

Call or contact us online to schedule Cornwall HVAC services today!

Male Haller tech with tool bag entering residential home smiling.


Frequently Asked Questions

What HVAC services does Haller provide?

We handle all types of heating and cooling work in Cornwall. Emergency repairs to complete system installations to regular maintenance visits. Our technicians service furnaces, heat pumps, boilers, ductless mini splits, and central air systems throughout the area. Whether your system breaks down during a Pennsylvania winter or you’re planning an upgrade, we provide the full range of HVAC services to keep your home comfortable through every season.

How often should I schedule HVAC maintenance?

Your heating system needs professional maintenance once yearly, ideally before winter starts. Your cooling system needs the same attention before summer arrives. Regular tune-ups in Cornwall catch small problems before they turn into expensive repairs. This is especially important given our temperature swings from humid summers to freezing winters. These visits also keep your equipment running well, which means lower energy bills and fewer middle-of-the-night breakdowns when you need your system most.

Do you offer 24/7 emergency HVAC services?

Yes, we provide emergency HVAC services for urgent heating and cooling issues. If your system stops working during extreme Pennsylvania temperatures, we respond quickly to restore comfort and safety.

How do I know if I should repair or replace my HVAC system?

Systems approaching 10 to 15 years old that need constant repairs or can’t keep your home at a steady temperature are usually better candidates for replacement. Age becomes especially important in Cornwall where our heating systems work hard through cold winters and cooling systems battle humid summers. When repair costs start adding up and your equipment can’t maintain comfort reliably, a new system typically saves money over time. Plus, you’ll get dependable performance.

Can a new HVAC system help lower my energy bills?

Modern HVAC systems can cut your energy bills substantially compared to older equipment. This is especially true in Cornwall where systems work hard through cold winters and humid summers. Today’s high-efficiency units use advanced technology that wastes far less energy than systems from even 10 years ago. Getting the right size system for your home and pairing it with a programmable thermostat increases those savings. You’ll often see monthly costs drop by 20% or more.

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