We bought a home that has 2 units - one for the main floor and basement and one that covers the upstairs.The previous owners updated the system in 2004 with a heatpump upstairs. I HATE heatpumps. I want tto just leave the heat pump in place (use it for AC only), but add on a nat. gas system. It has to cover about 1200 sq. feet. The gas line has to be run from the basement to the attic. About how much would that run?
It's very difficult to give you an estimate without seeing your house. You should try to call your local contractors about this. It's not a small job so you may get a free estimates. Get at least 3-4 bids from different contractors!
to replace a heat pump air handler with an 80% efficient gas furnace and a horizontal flow evaporater coil would probably run around $4000-$5000,,depending on difficulty of running a gas line and vent pipe,etc... fyi,dont get talked into a 90%+ furnace for the attic.....those type furnaces emit condensation by design,which can freeze in an attic during very cold weather [ depending on where you live]...even if attic doesnt typically get below freezing and they offer to install heat tape on the drain line and trap DONT do it....what if the heat tape failed during a cold snap,,or what if the furance failed or power went out for extended period,,condensation could freeze and clog or bust open the drain line,trap,or furnace secondary heat exchanger,,not worth the chance,esp since 90%+ furnaces are much more expensive to install to begin with,,not to mention the potential condensate leaks that any 90%+ could have as they age............dan
