Furnace is busted (defective heat exchange and has been deemed not safe) we have a one year old kiddo and obviously want to have it repaired or replaced ASAP. Its 19 years old so obviously we would rather replace than repair. Other than Dons Heating (because we will probably go with them anyway) what are some other options we have? Has anyone ever rented a furnace? What are some of the companies you have used to replace a furnace and possibly a cost? Thanks in advance.