Let our family work for your family.
Affordable Heating & Cooling Systems
At Reilly Mechanical, we deliver cost-effective HVAC solutions that keep your home comfortable year-round. Serving Fairfield County, New Haven County, and Litchfield County, we specialize in installing and maintaining energy-efficient furnaces, boilers, central air systems, and ductless mini-splits that lower energy bills while providing reliable performance for years to come. We service all brands and models of HVAC equipment -no matter the age - so you can count on us to keep your system running smoothly.
Heating Services
-
Furnace installation & replacement
-
Boiler installation & service
-
Heating system repairs & troubleshooting
-
Preventative maintenance & seasonal tune-ups
-
Oil, gas, and electric heating solutions
-
24/7 emergency heating repair across Fairfield, New Haven & Litchfield Counties
Cooling Services
-
Central air conditioning installation & replacement
-
Ductless mini-split installation & service
-
Air conditioning repair for all makes & models
-
Seasonal AC tune-ups & preventative maintenance
-
24/7 emergency cooling repair across Fairfield, New Haven & Litchfield Counties
24/7 Emergency HVAC Services
Our emergency services include:
-
24-hour furnace & boiler repair
-
24-hour air conditioning repair
-
Immediate diagnosis & troubleshooting for all HVAC systems
-
Emergency replacement of critical heating & cooling components
-
Service for all major brands & models
Get the Comfort You Deserve
Reliable heating, cooling, and emergency HVAC services for homes across Fairfield County, New Haven County, and Litchfield County. Our licensed technicians are ready to keep your home comfortable, efficient, and worry-free — 24/7.
Save Electricity
Lower your energy bills with HVAC systems designed for maximum performance and minimal power usage. From energy-efficient units to smart thermostats, we help you get the most comfort for the least cost.
Efficiency is Key
Enjoy steady, reliable comfort year-round with systems that maintain your ideal indoor temperature. We install and service equipment that delivers precise heating and cooling while reducing waste.
24/7 Emergency Service
When your heat or AC fails, you can’t wait until morning. Our on-call technicians respond day or night to restore your comfort quickly and efficiently.
Customer Service
We believe great HVAC service starts with great customer care. From your first call to job completion, you’ll get clear communication, honest recommendations, and friendly, respectful service every time.
WHAT OUR CUSTOMERS ARE SAYING
WHAT OUR CUSTOMERS ARE SAYING
FREQUENT QUESTIONS
Frequently Asked HVAC Questions in Fairfield, New Haven & Litchfield Counties
Expert Heating & Cooling Answers from Reilly Mechanical
Homeowners across Southern Connecticut trust Reilly Mechanical for reliable heating, air conditioning, and 24/7 emergency HVAC services. Below are the most common questions we receive — packed with tips to help you keep your home comfortable, your system efficient, and your energy bills low.
Need help fast? Call us at (203) 617-5808 for same-day or emergency service.
*Emergency pricing may apply
1 – What should I do if my furnace or air conditioner stops working?
If your heating system or cooling system suddenly fails, first check your thermostat settings, replace the air filter, and make sure your breaker hasn’t tripped. If the problem persists, call Reilly Mechanical for 24/7 emergency HVAC repair anywhere in Fairfield, New Haven, or Litchfield County. Our trucks are fully stocked for same-day fixes.
2 – How often should I schedule HVAC maintenance in Connecticut?
We recommend twice-yearly HVAC maintenance — once in the fall for your furnace or boiler, and once in the spring for your air conditioning system. This ensures maximum efficiency, reduces breakdowns, and extends the life of your equipment. We offer affordable seasonal tune-up packages for homeowners in Southern Connecticut.
3 – How can I lower my heating and cooling costs?
The best ways to cut energy bills are upgrading to high-efficiency HVAC equipment, sealing duct leaks, installing a programmable or smart thermostat, and scheduling regular maintenance. Our team installs Energy Star® rated heating and cooling systems designed for Connecticut’s climate.
4 – Do you repair and install all HVAC brands?
Yes — our technicians are trained to work on all major HVAC brands, including Carrier, Trane, Lennox, Daikin, American Standard, and Rheem. We handle both heating and cooling equipment installation and repairs for all makes and models.
5 – How long does a new HVAC installation take in Fairfield County?
Most residential HVAC installations are completed in a single day. For larger projects or custom ductwork, it may take longer — but we always provide a clear schedule before we start. We handle the entire process from equipment selection to installation and testing.
Request a Quote
GETTING STARTED
Need Service or a Free Estimate?
Tell us what you need—install, service, repair, or maintenance—and we’ll get right back to you.
Proudly Serving
- Danbury
- Fairfield
- Greenwich
- Norwalk
- Stamford
- Trumbull
- Bridgeport
- New Milford
- Brookfield
- Monroe
- Oxford
- Milford
- New Haven
- West Haven
- Branford
- Hamden
- Waterbury
- Torrington
- Litchfield
- Bethel
- Shelton
- Derby
COTNACT US
Enter Details in This Form:
We will get back to you as soon as possible. If you are experiencing an emergency, please call us directly.