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I have a very old HVAC unit and i am pretty sure the AC part is refusing to start this year. As oppposed to calling for a repair, I would think a replacement would be worth it at this point due to the leaps made in efficiency now. I found out that natural gas is available in my neighborhood though my house is not tapped in at this point. At the moment, I have a split unit with the indoor part located in the space over the garage which I hope to turn into a small mother-in-law suite next year. I've heard alot of talk about energy saving units, but what I want to know is What is the best priced option that will give me the lowest monthly bills? Gas, Electric, dual source, split unit, all outdoor package unit? I'm thinking of leaving the HVAC unit cooling and heating the main house and having a seperate small wll unit for the mother in law suite so that it can be heated and cooled only when in use.
Thank you for any help :thumbup:
 
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