I am narrowing down the quotes for a new gas furnace / AC system. One installer is quoting a Lennox G61V and the other a Ruud UGRA series. One uses a hot surface ignition; the other direct spark. I know that if made well either can be quite reliable, but my question to all is whether there is any data that shows the Lennox hot surface design or the Rheem/Ruud direct spark system in these higher end models either performs better or is any more reliable? Also, is one significantly more expensive to replace?
- posted
18 years ago