A pricey appliance purchase deserves some consumer research and a furnace investment is no exception. Consumer Reports hasn’t reviewed individial models since 2000, but it does provide descriptions of the top sellers.
Another site, FurnaceCompare gives details of brand models and customer feedback in very organized listings.
The most recent reviews of central a/c brands are noted in the Consumer Reports May 2012 issue.
And the Library’s access to ChicagoCheckbook is also useful when learning more about heating/cooling contractors. Please let us know if you need help using this or any of our subscription databases.