I have narrowed down my choice for a add on furnace between the PSG Caddy or the Yukon Super Jack. What is the better of the two furnaces? I found a deal on a Caddy with a blower for $2500. I found two of them for that price. One is brand new from a dealer, but is last years model, but the unit is about a hour away . The second one was used for two days and I guess it was to big for the house it was installed in and they took it out and put in a Mini Caddy, but this dealer is about 5 minuits from me. The Super Jack is $2449, but also $321 for a blower, and I still have to pay shipping. What is the better way to go, and what furnace is better? I hear good things of the PSG and the Yukon. Also, what size chimney does the Caddy need? One dealer says a 6", the other says a 7".