We're the Geothermal Source in Berthoud! Berthoud homeowners in the know look to Comfort By Nature for all their geothermal heating and cooling needs. They trust us to give not only the proper installation and service but also the insight to help them maximize the potential from their geothermal systems. Considering a geothermal system of your own? Give our nifty little Geothermal Savings Calculator a whirl. Just load it with your data and stand in awe of the results. Then, contact us, the Berthoud, Colorado, geothermal professionals at Comfort By Nature.