I cant say enough good things about Lennox and the company that installed our new furnace.

I purchased a high efficiency G 71 furnace and XC 14 air conditioner from Mr. Brent Phillips of Phillips Heating and Cooling located in Ottawa, Ontario Canada. Mr. Phillips left a recent Algonquin College graduate to install my heating and cooling system without any supervision. Once I became aware of the errors and shortcuts that were made to my HVAC system I immediately called Phillips Heating and Cooling. In spite of my repeated requests, Mr. Phillips never attended at my home or addressed any of my concerns. With no other recourse available to me I reluctantly called Lennox Industries Canada. They immediately sent a certified technician to investigate and document the installation of my system. Lennox Industries corrected all code violations, shortcuts and shoddy workmanship at no charge to me. Lennox Industries Canada suspended Phillips Heating and Cooling as an Authorized Lennox Dealer and removed his company name from their website. The Better Business Bureau Of Ottawa Board Of Directors revoked the accreditation of Phillips Heating and Cooling on November 24, 2009 due to unresolved complaints..http://www.bbb.org/ottawa/business-reviews/heating-and-air-conditioning/phillips-heating-and-cooling-ltd-in-ottawa-on-31952
Even a great furnace as the G 71 is, is only as good as the installer you are dealing with. Research the dealer carefully before deciding by making sure they have a full time service department who are available 24/7/365.

We love Lennox it works good have no issues and its 30 years old .

I purchased the signature series g71p in march of this year (09). The furnace is everything it says it is. This model is very efficient and the company that installed it were great. They took the time to do a j-load calcualtion which shows me they truly install what you need in your square footage. I have no complaints on this model, it is very quiet as well.

We had moved into our house with Lennox Merit series unit in 2002,Model C26-41-1 the very next year 2003, needed to install hard start booster kit (cost $328.00);
By 2004, the contactor was burnt out, replacement $210.00; Then by 2006, A/C was not working properly, technician came and said we didn't need the capacitor, so he took it out for some reason, service cost $150.00; The next year in 2007, A/C again wasn't kicking on properly in the Summer, this time had the conducer motor replaced, total repairs $576.00; On to 2009 Summer, found out there was a capacitor that was in there after all and needed to be replaced, cost $211.00. So far all above was part of the A/C. Then this week, Fall 2009, the furnace motor and blower started to make loud noise, repair estimate: $1146.00. The funny thing is the repair guy said we'll be better off replacing the entire furnace at this point because it will start to go after a little while. I told him we have had a bad taste for Lennox by now. Thanks, but no thanks!

I bought a Lennox mmodel CR 26-41-1, and have had nothing but problems from the beginning.

After doing some research, I find that many consumers are experiencing the same problem I have: The furnace fails to ignite properly.

After having my furnace looked at several times, servicemen say they find no problem. I have replaced 4 thermostats, thinking it was a thermostat problem.

After doing my research, it is apparent to me that Lennox furnaces have some type of defect with the ignition mechanism.

I WILL NEVER BUY ANOTHER LENNOX!

Our Lennox was purchased to replace an old unit in 2006. The motor failed one DAY before the 3 year warrenty expired and it cost us $400 to replace, for the labor. THIS is outragous! Now the control board has failed, we are forced to hire another repair person, and this has caused our air-conditioning unit to not work until the faulty control board is fixed. WE will never purchase or recommend Lennox to anoone again. We have no idea what our final cost to fix a 2006 unit, which should have been good for at least 20 years will cost. WE will file complaints with Lennox. Meantime we are hot, ill and VERY unhappy with this company. Wish we had found the rating of 3 for reliablity and installation before our purchase. Please don't make the same mistake we made. I got the name of the company from a neighbor who works with Lennox and I'm really sorry I ever trusted this company.