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.
Hawaiian eruptions are a type of volcanic eruption, named after the Hawaiian volcanoes with which this eruptive type is hallmark. Hawaiian eruptions are the calmest types of volcanic events, characterized by the effusive eruption of very fluid basalt-type lavas with low gaseous content.ulcanian eruptions are a type of volcanic eruption, named after the volcano Vulcano, which means the word Volcano. It was named so following Giuseppe Mercalli 's observations of its 1888-1890 eruptions.