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Cornett Heating & Cooling

We service the Serverna Park, Annapolis, Arnold, Pasadena, Glen Burnie, Millersville and surrounding areas.  Reach out to us if you’d like a consultation, 410-647-6979

About Cornett Heating & Cooling


Cornett Heating & Cooling, located in Severna Park, Maryland, is your premier destination for top-quality HVAC (Heating, Ventilation, and Air Conditioning) services. Our team of highly trained and certified technicians is dedicated to providing exceptional HVAC solutions for both residential and commercial customers. When it comes to HVAC installation, maintenance, and repairs, we have the expertise to keep your indoor environment comfortable year-round. At Cornett Heating & Cooling, we prioritize energy efficiency and sustainability, offering eco-friendly HVAC options to help you reduce your energy bills and environmental impact.


As your trusted HVAC company in Severna Park, we take pride in our commitment to customer satisfaction and our deep roots in the local community. Our website, https://www.cornetthvac.com/, showcases our professionalism and the range of services we offer. Whether you need a new HVAC system installed, routine maintenance, or emergency repairs, you can rely on Cornett Heating & Cooling to deliver reliable, cost-effective solutions. Contact us today for all your heating and cooling needs, and experience the difference our expertise makes in keeping your home or business comfortable and energy-efficient.


Check out some important pages from our company's website:


Read what 300+ clients have said about our services:

Our Work

127 Hatton Drive , Severna Park, MD, US

This was a 3-ton Bosch furnace that Cornett HVAC installed in Severna Park Maryland. Give us a call today, 410-801-7771  to schedule a routine maintanence check on your system before it's too late. With the winter months coming, it's important to get ahead of the issues that could be looming.


When choosing between a 3-ton and a 4-ton Bosch furnace system involves considerations related to the heating and cooling needs of your space. Here are some factors to keep in mind:


  1. Size of the Space:
  • The primary factor in determining the appropriate size is the square footage of the area you want to heat and cool. Generally, larger spaces require more heating and cooling capacity. However, other factors like insulation, ceiling height, and local climate can also influence this.
  1. Insulation and Energy Efficiency:
  • Well-insulated homes may require less heating and cooling capacity. Consider the insulation quality of your home, as a well-insulated home can retain heat in the winter and cool air in the summer more effectively, reducing the load on your HVAC system.
  1. Climate:
  • The local climate is a significant factor. If you live in an area with extreme temperatures, you might need a larger system to handle the demands of both heating in the winter and cooling in the summer.
  1. Occupancy and Usage:
  • Consider the number of people in the space and the amount of time the space is occupied. More occupants and longer usage may require a larger system.
  1. Ductwork:
  • Ensure that your ductwork is properly sized for the chosen furnace system. Inefficient or undersized ducts can impact the performance of the HVAC system.
  1. Manufacturer Guidelines:
  • Check the manufacturer's specifications and guidelines for their furnace systems. They often provide recommendations based on square footage and other factors specific to their products.
  1. Energy Efficiency Ratings:
  • Compare the energy efficiency ratings (SEER for cooling, AFUE for heating) of the different models you are considering. Higher efficiency units may cost more initially but can save you money on energy bills in the long run.
  1. Consult with HVAC Professionals:
  • It's advisable to consult with HVAC professionals or contractors. They can perform a load calculation for your specific home, taking into account all relevant factors to determine the appropriate system size.
  1. Warranty and Maintenance:
  • Consider the warranty and maintenance requirements of each system. Some systems may have longer warranties or require less maintenance, which can impact the overall cost of ownership.
  1. Budget:
  • While not directly related to the size, consider your budget for the purchase and installation of the HVAC system. A larger system may be more expensive upfront and in terms of ongoing operational costs.


Ultimately, it's crucial to strike a balance between system size, energy efficiency, and cost to ensure optimal comfort and cost-effectiveness for your specific situation.

  • Our Services
  • Our Services: Annual Maintenance Program
  • Our Services: Repairs
  • Our Services: Full Installs
414 Ben Oaks Drive West , Severna Park, MD, US
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  • Our Services: Repairs
325 Swinton Way , Severna Park, MD, US
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  • Our Services: Annual Maintenance Program
  • Our Services: Repairs
1255 Baltimore Annapolis Boulevard , Arnold, MD, US
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  • Our Services: Repairs
37 Saint Andrews Road , Severna Park, MD, US
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  • Our Services: Repairs

Customer Testimonials

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Mike & Lisa Etheredge
Zach arrived promptly, quickly diagnosed the issue, and made the repair. He also provided a thorough explanation of the issue and resolution. We bought our HVAC system from Cornett a few years ago and continue to be very happy with the professional service they provide. Have referred multiple family members and friends to them as well.
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Kelly Brown
Danny was prompt and expeditious in servicing our AC unit and getting it back in working order, during one of the hottest days of the summer.
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mindi wachs
Danny was our tech … he was great… informative, professional, on time and so helpful. Cornett got us on the books quickly in the middle of heatwave. Thank you! Highly recommend!
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Michelle Clabby
The two gentleman were actually early for the appointment and very polite and professional. We’ll call them if any other issues arise.
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Alvina Williams
The experience with Cornett Heating & Cooling was very professional and excellent customer service from setting up the request on line and a follow up call from the office, to set up the official appointment for maintenance service for my HVAC System. The Technicians were on time, running ahead of their schedule, and afforded me the coursety with a phone call to see if they could arrive earlier which was excellent for me. Once the Technicians entered my home, they were very professional, consi...Read more