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  1. #1
    Join Date
    Dec 2011
    Posts
    9

    Straight heat pump, dual-fuel, or gas & straigh AC

    I am looking to replace my forced air oil furnace and air conditioner in my 2200 sq/ft tri-level home in Virginia this summer. The equipment is close to 30 years old, and the fuel oil system, while getting nice and hot, is running me out of the house on fuel costs. My wife and I like it warm, and typically like to run the heat around 72 degrees or so while at home.

    Natural gas is available in the area, and the gas company will run a line to the house for free if I have a gas furnace installed. Now, I have noticed that natural gas, although cheaper, is getting more expensive, as more power plants convert from coal to gas. The electricity rates in Virginia have been quite steady at around $.095/ kilowatt for several years now. Several people around here have dual fuel gas & heat pump systems. A straight heat pump seems to be the most inexpensive to install and operate based on the history of electric rates, but will give the least amount of comfort. A natural gas system with straight air conditioner seems to be the next most expensive to install, and right now, will give almost as inexpensive operating wise, but what is natural gas rates looking like 10 years from now? The last option of a dual-fuel system looks to be the most promising because I could choose the cheaper fuel, and also be the most comfortable, as the gas furnace will make hotter heat. It is the most expensive for the install however.

    What are your thoughts on natural gas prices and electric prices over the next 10 years. Stay about the same? I am thinking natural gas is going to continue to rise, and I am worried about being in the same conundrum as I am now with the oil furnace that is too expensive to run if I go straight gas?

  2. #2
    Join Date
    Dec 2004
    Location
    Grand Rapids, MI
    Posts
    612
    Utility costs are a gamble in my mind, go for both.
    I would go with a 2-stage air-to-air HP with a single stage high eff. natural gas furnace w/ ECM blower and zone the house for better comfort.
    luck dan

  3. #3
    Join Date
    Oct 2010
    Location
    Anderson, South Carolina, United States
    Posts
    6,747
    Dual fuel is the best set up out there aside from geothermal (which you may want to look into as there is a 30% fed tax rebate no cap on install). As far as energy costs I suspect natural gas to stay the same or get cheaper, due to fracking, and electricity to increase that's just a WAG though.

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