Still using a conventional heating and cooling system? This might be the time to convert your existing furnace and air conditioner to a geothermal system. It could be as simple as connecting to your existing ductwork.

Geothermal heating and cooling systems have the highest Energy Star rating of any system available. In fact, they are more that 3 ½ times more efficient than the average conventional system. With energy tax credits, utility rebates and lower overall operating costs, your geothermal system will start giving you a Return On Investment the first day you use it.


  • Your return on investment starts immediately with a 30% tax credit on the cost of the entire system installation. Utility rebates and reduced operating costs.
  • Zero emissions from burning fossil fuel means a healthier indoor air quality and reduced pollution in your neighborhood.
  • Flexibility and Versatility in design and installation of system.
  • Lake Air Heating and Cooling, LLC has over 45 years experience in HVAC and our technicians are certified geothermal installers.

Radiant Floor Heating

Modern under floor heating systems use either electrical resistance heating elements or fluid flowing in pipes called hydronic systems. Electric resistance works well in small areas of low mass heating such as bathrooms, entries, kitchens or other small areas. Hydronic systems work well in high mass applications such as basement, garage, patios or large floor areas. Hydronic systems use a mixture of water and propylene glycol as the heat transfer fluid in a “closed loop” circulated in the flooring.


Under floor heating thermally conditions the interior surfaces with low temperature “long wave radiation”. The cold floor is warmed by this radiation of heat through the flooring surface. Normal convection of body heat from your feet on a cold floor is eliminated.

Longevity and Maintenance

Proper installation and following a “best practices” approach for design, construction, operation and maintenance eliminate future problems after installation. A hydronic systems using cross-linked polyethylene (PexA) product that is resistant to corrosion or temperature and pressure stresses have demonstrated reliable long term performance in harsh cold climate applications.

System Efficiency

Hydronic heating systems for floors are the most versatile given the many applications in today’s construction styles. Low mass, high mass, carpet, tile, wood, ceramic, etc. all require different temperatures and flow rates for optimum performance. Only a hydronic radiant system gives you that versatility.

Air Source Heat Pumps

An Air Source Heat Pump is an air conditioner with a reversing valve that allows it to operate 12 months out of the year. In summer months the unit extracts heat from inside the house and discharges it out doors. In the heating season the unit extracts heat from the air outside and sends it inside the house. The compressor runs the same way summer and winter. The analogy is the motor in your car. It always runs in the same direction and the transmission moves the car forward or in reverse.


Heat Pump performance is measured in terms of a (HSPF) Heating Seasonal Performance Factor. The higher the HSPF rating of the unit the more efficient it is. An HSPF 8 is considered a high efficient system according to Energy Star ratings. Based upon the efficiency rate most utilities offer rebates too.


At +20 degrees a high efficiency air source heat pump is approximately 150% efficient. The average winter temperature in the Mpls., St. Paul area is +42 degrees which transfers to a system performance of over 200% efficient.

Dual Fuel

The most efficient system design with an air source heat pump is “Dual Fuel”. A gas furnace is used as the air handler and back up for the heat pump. The electric utility will discount the electric rate for operating the heat pump for the rite to “manage” the electric load on their grid system in peak demand. Most utilities discount their rate by 50%. When coupled with the high efficiency of the heat pumps fuel savings a return on investment can be achieved in the first year of operation.