Replace Existing System Has your gas furnace seen brighter days? Thinking about changing out you current inefficient system before it needs costly repairs? A smart choice when considering replacing an old or inefficient furnace in Green Bay, WI is to choose a WaterFurnace geothermal products. With no combustion, there isn't any need to exhaust waste gas. Our easy to install units only need an electrical connection you already have. So, our equipment can be installed virtually anywhere. Most homes can instantly enjoy the full benefit one of our geothermal systems can provide. You required to have ductwork previously installed. If not, we can easily solve this problem by having the required ductwork installed by our professional staff. Other options to consider are... Radiant in-floor heating - Gone are the mornings of walking on freezing tile Water heating - Adding this great add-on will heat your water year-round Just think of it - comfortable heating, warm floors, and hot water; all while saving you money and the environment at the same time. Check out the savings calculator to see how much you can save by switching to a geothermal system!