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We service, maintain, and install heating and
cooling systems to keep your home
comfortable all year long.
24 hour Emergency Service.


Located in the MOT area, servicing NCC, Kent and surrounding areas.

HVAC Service Repairs, Seasonal Tune-ups and New Installs. We will take care of all your indoor comfort needs.

time to replace or upgrade
best Middletown, Delaware HVAC, Indoor Air Quality
tune up to help prevent repairs


Andrew Miller of Miller Heating & Cooling fixed my AC. Not only did he do a great job, he drove up from the beach to do it on a Saturday, and did not charge me an arm and a leg!! Use this company if you need your Heating or Cooling repaired!!!!!

Thanks, J.W.

Last year my A/C was not cooling as well in the past. I had Miller perform a A/C tune-up. The tech showed me why the unit was not cooling (Grass covering the outdoor unit) as well in the past. The tech cleaned the unit and I could feel the difference on the first hot day.

Thanks, R.T

I called Miller Heating & Cooling to repair my daycare A/C. The repair was made the same day.

Thanks, M.C

My oil burner was not running. Miller was out the same day and had my unit running

Thanks, Ms. M.S

Featured Manufactures

At Miller Heating & Cooling LLC, we proudly install American Standard, Aprilaire, Honeywell, Bradford White water heaters, Navien tankless water heaters, and Weil McLain boilers. We will perform maintenance and repairs on all HVAC equipment

american standard

Heating and Cooling Contractors Based in Middletown, DE

Miller Heating & Cooling is one of the leading HVAC companies in Delaware because of our 30-plus years’ experience and commitment to high-quality service. Based in Middletown, DE, we serve the region with a complete lineup of professional heating and cooling solutions designed for both residential and commercial customers. We can service all types of HVAC units and provide 24-hour emergency HVAC solutions. Our reliable HVAC company does everything from HVAC installations and inspections to maintenance and repairs.

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Areas We Serve

Our Delaware HVAC contractors are proud to serve areas like:

  • Kent County
  • New Castle County (NCC)
  • Middleton (MOT)
  • Dover
  • Newark 
  • And other nearby communities

Our heating and cooling contractors are highly trained and able to troubleshoot, maintain, and install any type of residential or commercial heating and cooling units. Your heating and air conditioning systems are essential to your home or business, so never trust their care to an inexperienced operator. 

There’s a reason that we’ve been trusted by locals for three decades. We attribute our success to our honesty, integrity, and HVAC expertise. Plus, we are committed to charging fair, upfront rates for all of our heating and cooling services. When you need assistance with your indoor comfort, we’ll provide the HVAC solutions you need, when you need them.

Residential HVAC Services

Miller Heating & Cooling provides expert heating and air conditioning services for Delaware home and business owners. We offer services for homeowners that include:

Our technicians can service any make or model residential unit. We train continuously to ensure that we’re up to date on the best products and techniques our industry affords.

Commercial HVAC Services

When the heat goes on the fritz at your business or you need to replace your HVAC unit, you can trust Miller Heating & Cooling as your commercial heating and air conditioning company. We’re a leading HVAC commercial contractor that services Delaware with a wide range of solutions. Your commercial HVAC unit is an essential component of your business investment. Let our highly trained technicians provide you with the maintenance and repair services you need to ensure its longevity and reliable function. When it comes time to replace your aging unit with a new one, we can help you select the ideal energy-efficient unit for your office, retail location, warehouse, or other commercial property.

We Offer 24/7 Emergency Service

When your heating system goes down in the middle of a bitter winter, you can rely on Miller Heating & Cooling to provide you with the emergency service you need. Heating and air conditioning emergencies don’t follow normal business hours, so we provide service whenever you need it. We are committed to ensuring that our customers get the professional solutions they need to stay warm or cool, depending on the season. We understand that a breakdown affects your business and your livelihood. That’s why our on-call teams are ready to provide you with service ASAP.

Call Now for HVAC Service

If you live in Delaware cities like Middletown, Dover, or Newark, be sure to contact Miller Heating & Cooling to provide you with the residential and commercial services you need. You can always expect us to provide fair, upfront pricing and professional service delivered by our friendly, highly-trained techs. Call to schedule a free estimate on a new unit or routine HVAC maintenance today.

© 2018 - Miller Heating & Cooling, Professional Quality Indoor Comfort