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About Us

We proudly offer services to the following communities:
  • Fond du Lac
  • Omro
  • Pickett
  • Rosendale
  • Springvale
  • Brandon
  • Waupun
  • Oshkosh
  • Van Dyne
  • Mayville
  • Oakfield
  • Empire
  • Eden
  • Calumet

Owner David Larson started in the HVAC and sheet metal trade over 20 years ago. with a staff with over 50 years of combined experience, the company has grown over the years and now resides in a full shop and showroom built for the business in 2005 on Mosher Drive in Fond du Lac.

We maintain a high level of quality among our staff. All of our installers and technicians are trained on a regular, on-going basis. We, and they, are certified by the following industry organizations:

Carrier Factory Authorized Dealer


Carrier Factory Authorized Dealers are the home heating and cooling experts to turn to. They are your single resource for everything you need?from tailoring your ideal comfort system to installation, service and beyond.

Look for the Carrier Factory Authorized Dealer seal of approval?it means your dealer has met our rigid criteria for quality. In fact, Carrier offers you a 100% satisfaction guarantee when you purchase your Carrier equipment from a Factory Authorized Dealer. It's your sure sign of an air conditioning and heating system dealer that will provide you with superior products, intelligent insight and the ultimate service.

Becoming a Carrier Factory Authorized Dealer is no easy feat. Only those expert heating and air conditioning dealers who meet our highest standards and closest scrutiny?not only for their technical expertise, but also for their business practices and customer service quality?earn the Carrier Factory Authorized Dealers distinction.


NATE Certified Dealers in Wisconsin

North American Technician Excellence (NATE) is an independent, third-party organization that develops and promotes excellence in the installation and service of heating, ventilation, air conditioning and refrigeration equipment by recognizing high-quality industry technicians through voluntary testing and certification. Our technicians have passed the rigorous testing necessary to qualify as NATE Certified Technicians.


Home Builders Association Member

The Home Builders Association of Fond du Lac and Dodge Counties, Inc. is a locally governed non-profit organization comprised of independent business professionals. Chartered in April of 1966, the association is an active force in the local building industry. Our membership represents those associated with the building industry who have chosen to adhere to the code of ethics of the National Association of Home Builders. Our members, as well as, residents of Fond du Lac and Dodge Counties and surrounding areas, local businesses, government and charitable bodies benefit from the association activities. Our focus is to educate, inform, and promote integrity, professionalism, and careers within the building industry.

Copyright 2015-2016 Fondy Heating & Air Conditioning