My parents are getting ready to replace there 25yr old bryant heat pump system with something more efficiant since they are getting 500 plus elec bills and cant get gas were they are. I know there are some real good systems out there and some bad ones who recomnds what and why?? Im trying to help them out with all the info I can. I did do some hvac for a awhile so I do know some but not who has the best and why. Thanks