Air Conditioning Maintenance, Repair & Installation

Specializing in residential and commercial air conditioning installation, Official Heating & Air Conditioning is committed to providing exceptional service and customer satisfaction with every project. We have a wide selection of premium quality air conditioners at competitive prices that are designed to meet your individual requirements. Our team is dedicated to keeping your home or business comfortable all year long and can handle any size job, big or small. No matter what your air conditioning needs are, you can be sure that Official Heating & Air Conditioning has the expertise and resources to get the job done right. Trust us to provide reliable service and quality results. Contact us today to learn more about our services.

Basic | 4SCU13 LB

4SCU13 LB Armstrong Air A/C

Bronze | 4SCU13 LE

4SCU13 LE Armstrong Air A/C

Silver | 4SCU16 LE

4SCU16 LE Armstrong Air A/C

Gold | 4SCU16 LS

4SCU16LS Armstrong Air A/C

Platinum | 4SCU20 LX

4SCU20LX Armstrong Air A/C

How much does it cost to replace a Air Conditioner?

The size of your home will determine the cost of your Air Conditioner. Different sizes and SEER (Seasonal Energy Efficiency Rating) ratings come at various prices, with 13 SEER typically being the most affordable but least efficient option. A higher efficiency 16 or 20 SEER unit is more expensive but can save you an estimated $21+ per month on electricity alone. For even greater savings, ask about 2-Stage options which offer added energy efficiency. In addition to utility rebates that may be available for high-efficient systems, seasonal rebates, discounts, and same-as-cash financing are also offered to help make these upgrades more accessible. No matter what type of AC system you choose, you’ll be sure to get the best bang for your buck.

Rock*Star Plans for Your Home

We are now a certified Armstrong Air Pro Team Member

We are now a certified Armstrong Air Comfort Team

Financing with SERVICE FINANCE Company is Available

Click the buttons below to apply for financing.

Apply for Financing

Get Your Exclusive 12-Year Warranty with the installation of any full system and by joining one of our Rock*Star Maintenance plans!


We customize your comfort by making your home smarter, healthier and more efficient. Your peace of mind is as important to us as your comfort.

That’s why every product us backed by warranties as robust and dependable as the products themselves.

Every piece of heating & cooling equipment is eligible for a 12-Year Parts Warranty, when you join ANY one of our 3 “Rock*Star Maintenance Programs”.

All other products are eligible for the 12-Year Parts Warranty.

Ask for details, terms, and conditions. All product warranties are registered by Official within 30 days of purchase.

on all equipment repairs, indoor air quality & comfort items

Including humidifiers, air filters, air cleaners, thermostats and more! 12 year parts and labor warranty requires joining ANY one of our 3 Rock*Star Maintenance Programs. Ask for details, terms, and conditions.

The “Exclusive 12-year Parts & Labor Warranty” covers parts and labor cost from the time of purchase. “Exclusive 12-year Parts & Labor Warranty” requires annual maintenance to be performed by Official Heating & Air Conditioning beginning immediately from the time of purchase. Maintenance must be performed annually during the initial 12-year coverage term in order to uphold warranty status. If annual maintenance is missed or not performed by Official Heating & Air Conditioning, the “Exclusive 12-year Parts & Labor Warranty” becomes void immediately. Warranty coverage defaults to a 10 year part warranty and a 2 year labor warranty from the time of purchase. Warranty is registered to the purchaser and is not transferable.


when you purchase a Furnace or Air Conditioner from Official!

Official Heating & Air Conditioning is Your Local Experts

When you choose Official Heating & Air Conditioning, our team of experts will take the time to understand your specific needs and provide a tailored solution that fits your budget. We offer fast, reliable service and take pride in delivering quality workmanship at an affordable price. Our experienced technicians can handle any type of air conditioning installation project – from residential homes to commercial buildings. Plus, our customer satisfaction guarantee ensures that every job is done right the first time for lasting comfort and peace of mind. With us on the job, you can rest assured knowing your air conditioning system will be installed properly and backed by dependable service for years to come.

Stay cool in your home with an Armstrong Air A/C system! Call Harmonic today to get yours!

Air Conditioning Repair

If your air conditioner is failing to keep the temperature in your home or office comfortable, turn to Official Heating & Air Conditioning for reliable AC repairs. We are a full-service HVAC company serving residential and commercial customers in McHenry, Lake, Kane, DuPage, and Cook counties. Our licensed technicians are insured and knowledgeable in all aspects of air conditioning repair services.

Our friendly staff will go above and beyond to make sure you get excellent service each time you call us. With premium products and quality workmanship, we promise prompt and efficient project completion. What’s more – we offer 24/7 availability so that you can count on us whenever you need help with your AC system.

Our staff will extend every effort to ensure your complete satisfaction. As our customer, you’ll benefit from our:

  • Friendly, efficient office staff and crew
  • Premium-quality parts, materials, and workmanship
  • Prompt and efficient project completion
  • Policy of being available 24/7

At Official Heating & Air Conditioning, we strive to meet the HVAC needs of residents and business owners throughout Crystal Lake, McHenry, Chicago, North and Northwest Suburbs, as well as their surrounding communities. Our team has built a reputation for trustworthiness with our neighbors by offering top-notch services every time. Get in touch with us today to schedule air conditioning repairs or an on-site estimate with our qualified HVAC contractor. We look forward to helping you!

Official is at Your Service in Crystal Lake, McHenry and Northern Illinois

We understand that when it comes to branded air conditioning replacement, you want reliability, affordability and quality. That’s why at Official Heating & Cooling, we pride ourselves on working hard to ensure that your experience is nothing short of perfect. Our team of experienced contractors will work quickly and efficiently to provide you with top-of-the-line models that are both affordable and reliable.

No matter the size of the job, our technicians have the expertise to handle any installation or replacement project smoothly and with minimal disruption. From single units in residential homes to entire office buildings needing upgrades, our contractors can help find a cost-effective solution that meets your needs while providing the highest level of customer satisfaction.

If you’re looking for a reliable and affordable branded air conditioning replacement, give us a call. Our team is available to answer any questions you may have and provide an estimate for the project. Contact Official Heating & Cooling today to learn more about how we can help keep your home cool and comfortable!

Armstrong Air Air Conditioners


Armstrong Air Furnaces