Fine Home Builders of Southern New Hampshire
Specializing in Energy Efficient Geothermal Houses


The house is all electric (no combustible fuels), and heats using the well water as the fuel source. We would definitely do this again!"... READ MORE

"We are a family of four with two children ages 11 and 7.

Both of our children suffer from sever allergies to dust, mold, etc., and our 11 year old suffers from asthma as well. In searching for our new home, indoor air quality was a strong concern for us." ... READ MORE

"The geothermal system is efficient, clean, and in these days of ever increasing fuels costs and concern for the environment, I am the envy of my friends." ... READ MORE


In this day and age, people are looking for healthier and more environmentally safe ways to live. Geo-thermal houses can do this for you. Most homes require fuel to produce heat and a separate system for air conditioning. Geo Exchange provides you with both.


Tom Rosswaag, owner of Native Construction LLC, is the most experienced builder of Geothermal homes in the state of New Hampshire. With over 32 years of building experience and more than 100 homes, Tom is at the forefront of this cutting-edge technology. Since 2003, Tom has collaborated with Bill Wenzel Heating and Air Conditioning, Inc. to complete more than 20 geothermal houses and several retrofits.


No cap on 30% tax credit for residential

NEW – Federal Opportunities for Geothermal Projects as of February 17th, 2009!
The Stimulus Bill signed into law by the President on February 17th has many provisions that recognize the important contribution that the geothermal heat pump industry can make to the nation's economic recovery. See What You Can Do at the bottom of this message. Here is a partial list of the bill’s key elements:

  • Geothermal heat pump systems for residential applications (new, retrofit, primary and non-primary residences) receive a 30% tax credit starting January 1, 2009 through December 31, 2016. (The $2,000 limit for the 2008 tax credit has been removed for 2009 and later years.)
  • Federal facilities and military installations will receive billions for energy upgrades, and geothermal heat pumps will be an important component of those upgrades.
  • Each state will receive an average of $100 million to upgrade energy efficiency in the state, the uses for that money to be determined by each state, and geothermal rebates and loans are a good use of those funds.
  • Schools with receive billions for modernizing and improving energy efficiency, another very good fit for geothermal.
  • All commercial and private buildings are eligible for a 10% grant in lieu of tax credit for the total cost of installing geothermal systems, the check to be written from the government to the building owner within 60 days of completion.


  • The 30% residential tax credit has the effect of making geothermal systems cash flow positive at today’s energy prices in virtually every market.
  • The federal, state, military and school initiatives will create hundreds of large installations calling for hundreds of geothermal heat pump units each, as well as geothermal loop field work.
  • The commercial grants in lieu of 10% credits will make geothermal heat pumps very attractive to new and existing commercial enterprises in every market. -READ MORE
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