3rdof5

I would question that. You need to know what model you are getting. There are different models. Builder, ECM motor, two stage with ECM motor, two stage variable speed ecm motor. All make a difference in price. I myself would go with the G9MVE model. The 2 stage allows the furnace to run run at half rated output until full output is required to keep up with heatloss. And it also helps eliminate cold spots in house keeping the house at a more even temp.

Keep Rite have been around since AC was invented. The are owned by ICP (international comfort products). I've been installing keeprite for over 30 years with barely a hicup. They are also inbed with Carrier. Make sure you are going for one of their higher end units. G9MVE or G9MXT. Both are 2 stage the VE has variable speed fan. They come with 10yr warrenty and lifetime on heat exchanger. One nice thing about KeepRite is the ease of getting parts, if required. The price seems fair especially if you are switching from oil. Also don't go for a model that starts with N that is builders quality and has cheaper components. As for AC if you go for the 13seer in combination you will get 14 to 15 seer. If you go for G4X6 it will give you 16 seer cooling. But it has a large foot print. Just my 10cents.