Professional HVAC Services in Jefferson County, Wisconsin

Jensen is dedicated to great service, great value and affordable HVAC (heating, ventilation and air conditioning) service and repairs to the Lake Mills, Johnson Creek, Jefferson, Watertown, Waterloo and Marshall areas. We are licensed, insured and committed to building relationships with our residential and commercial customers through honesty, integrity and quality. You can count on Jensen to provide you with the facts you need to make the best service or installation decision for your AC system or heating system. 

HVAC (Heating, Ventilation and Air Conditioning)

Jensen specializes in affordable HVAC repairs, installation and preventative maintenance service of central air conditioning and heating equipment of all makes and models. We will work with you to find an affordable, energy-efficient and quiet heating and air conditioning system that will fit your home or office and budget.

Professional Heating & Cooling Services

  • EPA Certified Technicians
  • NATE Certified Technicians
  • Preventative Maintenance
  • Furnaces/High & Mid-Efficiency
  • Air Conditioners
  • New Construction
  • Furnace and A/C Tune Ups & Safety Inspections
  • Air Cleaning Systems
  • Ductwork & Exhaust
  • Zone Systems
  • Whole House Humidifiers
  • Chimney Liners
  • Air to Air Heat Exchangers
  • Servicing all makes & Models
  • Gas & Wood Fireplaces
  • Gas & Wood Stoves
  • Gas Piping
  • 24-hour Emergency Service
  • Free Equipment & Installation Estimates
  • Commercial Installations
  • Dual Fuel Home Comfort Systems
  • Professional system analysis & installation
  • Hydronic Heating Systems
  • Geothermal Systems
  • Energy Star Products
  • In-Floor Radiant Heat
  • Energy Savings Program
  • Hydronic Floor Heating
  • Gas & Oil Furnaces
  • Complete Sheet Metal Shop

Free estimates

We offer free estimates on parts and new installations and we believe we can save you hundreds of dollars on your new HVAC – heating and air conditioning installation. A new HVAC system can provide up to 30% energy savings and greater reliability and less maintenance than older units. We will provide you with a free estimate to replace your HVAC unit, with an energy efficient Carrier system while staying within your budget.

HVAC Accessories

We offer a full line of accessories to improve your home’s air quality as well. Ask us about programmable thermostats, HEPA filters, air purifiers, humidifiers and dehumidifiers, UV lamp/germicidal control and more. See our products.

Air Conditioning, Heat Pump and Furnace Experts

We have over 25 years' of experience and have serviced thousands of heating and air conditioning units. Call us and one of our NATE trained knowledgeable technicians will arrive promptly with the right tools and supplies to work hard to repair your heating and air conditioning system. 

NATE Certified

Jensen employs NATE-certified technicians for your peace of mind and greater home comfort. NATE-certified technicians are skilled professionals who have proven their knowledge in the HVAC/R industry by passing specialized NATE certification tests. NATE is the only technician certification organization governed, owned, operated, developed and supported by the HVACR industry. From air conditioning and heating installer certifications to residential and light commercial maintenance, NATE techs are the best in the business.

You demand superior quality and you expect excellent service, and so do we. We will continue to earn our customers' trust and loyalty through our ongoing commitment to excel on their behalf. Call Jensen today at 800-236-3434 for a full range of air conditioning products and services, outstanding on-time service and repairs, knowledgeable replacement advice, and quality new installations.