We had to train on the carrier units in school. They are very well regarded and farily easy to troubleshoot.
The cost\savings benefit you will receive from going from a Standard to a High Efficiency Natural Gas setup will pay for itself in the first few years. You will be technically making money after that compared to your previous situation. It did you a long term favor by finally retiring.
FWIW, supplied and installed would run you around $3K for a well featured unit (dual stage at least) back in Calgary. Get several quotes if you can. Good Luck! Stay warm!
