HVAC Contractors in Hartford, WI

HVAC contractors install, repair and maintain the heating, ventilation and air conditioning equipment that keeps your home comfortable. They work on furnaces, air conditioners, ductwork, thermostats and ventilation, and help size replacement systems.

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Common HVAC services include:

  • Furnace and air conditioner repair
  • Seasonal tune-ups and maintenance plans
  • Replacing furnaces, AC units and air handlers
  • Ductwork repair, sealing and installation
  • Thermostat and ventilation upgrades

Call an HVAC contractor when your system stops heating or cooling, runs constantly, makes new noises, or your energy bills jump. Heat pump installation and air duct cleaning also have their own categories.

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Top Professionals near Hartford, WI

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Will's HVAC Services, LLC

Will's HVAC Services, LLC

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Slinger, WI HVAC Contractors

Will's HVAC Services LLC is a locally-owned and operated company with over two decades of experience serving the Washington County, Dodge County, and Waukesha County areas. We specialize in building honest and trustworthy relationships with our customers, providing top-tier heating, cooling, and ventilation solutions at an affordable price. Our team is dedicated to your complete satisfaction, ensuring your home remains comfortable and safe. Lincense #819 - HVACCONT Insured and Licensed EPA Certified

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Burkhardt Heating, Cooling, Plumbing & Electric

Burkhardt Heating, Cooling, Plumbing & Electric

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Milwaukee, WI HVAC Contractors

Burkhardt Heating, Cooling, Plumbing & Electric is a family-owned, third-generation Wisconsin company serving Southeastern Wisconsin since 1961 that provides comprehensive home services including HVAC installation, repair and maintenance, plumbing services (water heaters, drain cleaning, sump pumps), electrical work, and indoor-air solutions. Burkhardt Heating, Cooling, Plumbing & Electric offers furnace and AC repair and replacement, boilers, ductless systems, heat pumps, duct cleaning, smart thermostats, 24/7 emergency service, financing options and membership/special programs, and the company emphasizes local, skilled technicians, upfront fair pricing, easy online booking, and a long track record of customer reviews and industry accreditations.

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Capital Heating, Cooling, Electric, and Plumbing

Capital Heating, Cooling, Electric, and Plumbing

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Menomonee Falls, WI HVAC Contractors

Capital Heating, Cooling, and Electric (Capital HVAC) is a full-service Milwaukee-area home services company offering 24/7 same-day repair and installation across heating, air conditioning, electrical and plumbing needs, including furnaces, boilers, heat pumps, ductless mini-splits, central air systems, indoor air quality solutions, duct cleaning, whole-home generators, EV chargers and smart home products; the company operates a Merle’s League membership program with customer benefits, provides financing options and community charity involvement, guarantees workmanship and fair pricing, and is based in Menomonee Falls while serving Milwaukee and surrounding communities.

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RJ Heating and Air Conditioning LLC

RJ Heating and Air Conditioning LLC

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Milwaukee, WI HVAC Contractors

RJ Heating and Air Conditioning is a family-owned Milwaukee HVAC company serving Milwaukee, Waukesha, Ozaukee and Washington counties that provides heating, cooling and indoor air quality services. RJ Heating and Air Conditioning has served the area for decades and offers furnace, boiler, air conditioner and heat pump installation, repair and maintenance, plus humidifiers, air cleaners, UV lights, thermostats and related indoor-air services. The company runs a Comfort First membership program (including maintenance, parts-at-cost, discounted installation labor and after-hours service for $19.99/month), employs CFC-certified technicians, provides 24/7 emergency service, and backs installations with a 100% satisfaction guarantee.

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Heating and Air Conditioning Questions and Answers

What does an HVAC contractor do?

An HVAC contractor installs, repairs and maintains heating and cooling systems, including furnaces, air conditioners, air handlers, ductwork and thermostats. They diagnose problems, perform seasonal maintenance and size replacement equipment for the home.

When should I repair or replace my heating or cooling system?

Repairs often make sense for a newer system with a single failed part. Replacement is worth discussing when equipment is older, needs frequent repairs, uses a phased-out refrigerant, or no longer keeps the home comfortable. Ask the contractor to compare both options in writing.

How do I choose an HVAC contractor?

Look for a contractor who performs a load calculation before recommending new equipment, explains options clearly and provides written estimates and warranty terms. Ask whether technicians who handle refrigerant hold EPA Section 608 certification and whether local licensing or permits apply.

What affects the cost of HVAC work?

Repair costs depend on the part and diagnostic time. Replacement depends on equipment type, capacity and efficiency, ductwork changes, electrical or gas work, and local permit requirements. Maintenance plans, rebates and the season you schedule in can also affect the total.

How should I prepare for an HVAC service visit?

Clear access to the furnace or air handler, the outdoor unit and the thermostat, and replace or check the air filter if you can. Note what the system is doing, such as noises, short cycling or uneven temperatures, and when the problem started.