Thank you so much for this information. I just want to confirm that the Armstrong model and the magic pac system are of "equal quality". I believe the Magic pac # XXXXX XXXXX HMC 243A. One company said they would replace my unit with an Armstrong unit for $6,200 and the other gave me a rate of 5,800 for the Majic pac. Again I appreciate your help. Patricia
Brian - the model number may be one diget off. I will confirm this with the tech tomorrow if you don't mind waiting. I live in on the east coast so I don't know what the time difference is but I don't want to waste your time until I know that I have the exact number. I will email you again in the am, again, thank you so much for your help.