If you want to convert from an electric furnace to a gas furnace, you will need to have gas piping and ductwork installed first. This will add an additional up-front cost to the furnace and installation process of around $5,000 to $15,000 or more depending on the space. Leaky ducts can also cost homeowners about 10 percent to 30 percent in efficiency. 2  This will make a 96 AFUE high-efficiency furnace run at 66 percent to 86 percent and make an economical 80 AFUE not much better than an open fireplace. 3  The cost to replace ductwork is about $8 to $12 per linear foot of ducting.
A flood basalt is the result of a giant volcanic eruption or series of eruptions that coats large stretches of land or the ocean floor with basalt lava. Flood basalt provinces such as the Deccan Traps of India are often called traps, which derives from the characteristic stairstep geomorphology of many associated landscapes.
So, basalt is a type of igneous rock, igneous rocks are rocks formed from volcanoes and volcanic eruptions. So, basalt is a type of volcanic rock.It's also an extrusive volcanic rock which simply means that it formed outside of the earth.So, it cools, it gets ejected or it goes out into the surface of the earth and cools in air.o, basalt is a type of volcanic rock. It's also an extrusive volcanic rock which simply means that it formed outside of the earth. So, it cools, it gets ejected or it goes out into the surface of the earth and cools in air.