M.N. Heating and Air

Premier Heating and Air Conditioning Solutions for Your Home and Business


Welcome to M.N. Heating & Air, your trusted heating and cooling experts proudly serving Merrillville, IN and surrounding areas! For 10 years, our experienced, factory certified technicians have been providing prompt, reliable HVAC installation, maintenance, and repair services to local homeowners and businesses.

Located at the Heart of Crown Point

M.N. Heating and Air

11820 Burr St.

Crown Point, Indiana 46307



HVAC Services in Merrillville

We offer a full range of heating and cooling services to keep your home or business comfortable year-round.

Furnace Repair, Installation and Maintenance

Our licensed technicians are available around the clock to diagnose, fix and maintain furnaces. Whether repairs or new installations are needed, we ensure reliable heat throughout winter.

AC Installations

Let our team professionally install air conditioners using accurate sizing methods. You'll enjoy efficient, powerful cooling comfort thanks to our expertise in setup and installation.

Breathe Easy with Indoor Air Optimization

We enhance indoor environments through duct hygiene, humidity regulation, filtration and more. Clean air circulation supports wellness while removing allergens and pollutants.

Sustainable Heating and Cooling with Heat Pump Professionals

Our heat pump maintenance and installation services provide cost-effective thermal control utilizing renewable energy sources like geothermal and air.

Reliable Boiler Services

Repairs, installations and maintenance by our specialists results in safe, cozy heat while maximizing efficiency and energy savings from boilers.

Ductless Comfort Solutions

Mini-split experts install high-quality, zoned heating and cooling customized for size and needs with no disruptive ductwork required.

Garage Heater Installation and Repair

Rely on us to install and care for unit heaters to utilize your garage space all year long for work or storage.

Hot Water Installation

We optimize tank and tankless water heaters for continuous hot water through installation, maintenance care and timely repairs.

Thermostat Installation

Programmable thermostats installed by our team automate temperatures for convenience and energy efficiency.

Maintenance Agreements

Regular tune-ups and repairs covered by our customized plans prevent costly failures and extend lifecycles.

24/7 Emergency Heating and Furnace Repairs

We know furnace failures can happen anytime, especially on the coldest nights. Our technicians are always on call to address your "no heat" emergencies. We have the skills, parts, and availability to get your heat back on fast.

Commercial HVAC Services

Business owners require specialized HVAC services to keep their facilities comfortable and operational. As experienced commercial HVAC contractors, we handle unique needs including:

  • Large capacity rooftop units, chillers, air handlers, furnaces, heat pumps, boilers, VRF systems
  • Zoned temperature control
  • Advanced ventilation requirements
  • After-hours emergency services
  • Preventative maintenance programs
  • And all other commercial HVAC needs

We have the experience, training, certification, and equipment to expertly service commercial HVAC systems. Trust us to keep your business location comfortable no matter the season.

Why Trust M.N. Heating & Air?

At M.N. Heating and Air, our mission is to earn your trust by providing the utmost care and service. We build lasting relationships through four key promises:

Reliability - With 24/7 emergency service, you can rely on us anytime your system fails. Our techs respond promptly even during nights, weekends and holidays.

Expertise - Our factory certified technicians undergo regular training to stay current on the latest HVAC technology. You can be confident in our skills.

Affordability- With free estimates, financing plans, and competitive rates, we make comfort affordable. Special offers provide additional savings.

Satisfaction - Our commitment to 100% customer satisfaction is unmatched. We offer guarantees and warranties for peace of mind.

Contact us today to schedule service with a company you can trust!

Current Promotions

Take advantage of our seasonal promotions:

  • 10% Off Repairs – Save on any heating or cooling repair over $250
  • $200 Off AC Replacement – Upgrade to a new Armstrong Equipment
  • $100 Off Furnace Installs – Time for a new, efficient furnace?

Offers valid through June 2024 and can't be combined with other discounts. Call today to schedule!


Our Service Area

We provide residential and commercial HVAC services throughout Merrillville, IN and surrounding towns including:

  • Hobart
  • Crown Point
  • Schererville
  • St. John
  • Griffith
  • Highland
  • Munster
  • Dyer
  • And more!

As trusted heating and air conditioning specialists for over two decades, we have established a reputation for excellence through thousands of satisfied customers across the region.


For 10 years, M.N. Heating and Air has been providing best-in-class residential and commercial HVAC services to Merrillville, IN and surrounding towns. Contact us today to experience local, reliable, professional heating and cooling assistance!

About Merrillville, IN 

Nestled in east-central Lake County, Indiana, Merrillville boasts a vibrant pulse. Its proximity to the Chicago metropolitan area, just 33 miles southeast of the Loop, makes it a bustling hub for both residents and visitors.

Once a province to the Potawatomi Tribe, Merrillville's landscape transformed from dense forests to a thriving community. Its history whispers through its name, honoring brothers Dudley and William Merrill, whose influence shaped the town's growth. Officially incorporated in 1971, Merrillville has blossomed into a shopper's paradise.

US Route 30's corridor hums with activity, lined with an array of big-box retailers, hotels, restaurants, and car dealerships.

Beyond the shopping avenues, Merrillville caters to diverse interests. Nature lovers find solace in the lush greenery of Deep River Park, while history buffs delve into the past at the Merrillville History Museum. Families and friends unwind at the numerous bowling alleys, movie theaters, and entertainment venues.

Merrillville's tapestry is woven with convenience and a vibrant spirit. With diverse dining options, and a welcoming atmosphere, it's no wonder this town pulsates with life, offering a fulfilling experience for those seeking a blend of urban amenities and hometown charm.

Frequently Asked Questions

We provide a comprehensive array of air conditioning services to the Merrillville and Northwest Indiana area. This includes air conditioning system installation, central air conditioner repair, AC unit maintenance, and an AC repair service call in case of emergencies. So, whether you have an old air conditioner or need a new air conditioning system, do not hesitate to call us.

Yes, absolutely. In addition to repair and air conditioning services, we also provide installation of new air conditioning units including ductless and central air conditioner systems in Northwest Indiana and the greater Merrillville area.

Yes, indoor air quality is one of our specialties. We offer a variety of solutions including, air filtration systems which can dramatically improve the quality of air in your home. If you are concerned about indoor air quality, give us a call today to discuss how we can help.

As part of our comprehensive HVAC services, we offer a full suite of heating services. This includes heater installation, repair, maintenance, and even water heater services. We can handle everything from a gas furnace to an electric heater. So, if you need heating services in the Merrillville region or anywhere in the Northwest Indiana area, we're the contractor you should call.

Yes, we do recommend scheduling an appointment for any repair service. By scheduling, it allows us to deliver efficient and timely service. However, for emergency repairs like an ac repair service call, we understand the urgency and strive to respond promptly. Contact us through our service line 219-488-3845 to schedule an appointment.

We are proud to serve Merrillville and the surrounding Northwest Indiana area. Call us at our 219-488-3845 service line if you are unsure whether you're in our service area.

There are numerous factors to take into consideration when choosing a heating and cooling system for your home. This includes the size of your home, your temperature preferences, and your budget. Our experienced heating and cooling technicians can guide you through the process and recommend the system that's perfect for your specific needs.

The timeline for repairs can vary based on the complexity of the problem. However, our cooling company values your comfort and will make every effort to fix your cooling system as quickly as possible. For urgent matters, we offer an ac repair service call option as well

Yes, routine maintenance is essential for the long life and optimal performance of your heating and cooling systems. Our heating and cooling technicians are proficient in maintaining furnaces, air conditioners, and more. Give us a call to find out more about our maintenance programs.

If you need heating or cooling services in the Merrillville area or anywhere in the greater Northwest Indiana area, you can contact us by calling our service line. Feel free to call us today!

Call us Today

Don't leave your family's comfort to chance. 

Contact the HVAC professionals at M.N. Heating and Air today!