Lennox G71P Gas Furnace Review

Lennox G71P Gas Furnace Review

Despite the farmers overalls in the Lennox marketing program with Dave Lennox Lennox makes a good HVAC machine. Lennox is on the pricey side but you get what you pay for with Lennox. The Lennox G71P gas furnace is Lennoxs’ top of the line gas furnace model offering quiet heat that is produce efficiently by the G71P gas furnace. From reading the bullet points on the Lennox website about the Lennox G71P gas furnace I had some questions so I decided to call the 800 number and ask a few questions about the Lennox website description of the G71P. I really learned nothing more than what the website said so maybe some seasoned HVAC technicians or someone very familiar with the new Lennox models out on the market can help us out and email me or leave their response in the comments. My questions are in the bullet points. I called more than once and got the same response. The answers to my questions were read out of a book and said the same as what the website said. This is not good for Lennox in the overall review. I did have a leg up on the representatives who answered the phone but I played typical Joe Homeowner without telling them my reason for the call.

• SilentComfort™technology, Variable Speed Blower Motor, Fully Insulated Cabinet – Lennox has all these features listed under Quiet Operation. Yes all these things are good for the noise level of the equipment. No questions here. I would like to add that the noise level can also depend on the ductwork you have or the ductwork that will be installed with the new furnace. It is important that the ductwork is sized to match the CFM volume of the equipment. I take it Lennox is referring to the equipment itself and not the entire system as a whole. Giving Lennox credit where credit is due Lennox does have a good dealer training program. I once worked for a Lennox dealer and had the opportunity to take advantage of some of the Lennox training.
• Precise Comfort™ technology, AirFlex™ technology,  Zoning, Variable Speed Blower Motor, Variable-Capacity Operation – All these are listed under Home Comfort describing the Lennox G71P Gas Furnace. Big questions under this section for the Lennox descriptions. My biggest question is this: Variable Capacity Operation? Is this not a modulating furnace? Does this only apply to the blower or does Lennox have a modulating burner to go with the variable speed blower? From the desrciption I take it as a possible yes to my questions but it doesn’t say this exactly. Next is the Precise Comfort™ Technology. Does this mean the system will eliminate temperature swings and what happens if I want to use my own thermostat instead of a Lennox thermostat? Will that void this technology and not allow it to work? Okay, so if I bought one of these babies I would use their thermostat but I am not trying to pry any secrets out of Lennox I am simply asking questions the typical homeowner would probably not ask but should. What is AirFlex™ technology? I asked that question to Lennox reps and could not find additional information on the Lennox website. Zoning is a good option for this type of system especailly since it is maybe modulating (it does have varying capacity according to the description but that is not telling me it is modulating). Variable Speed Blower is good and necessary for variable capacity and for dehumidification in the summer.
• Lennox, in additional descriptions (Energy Efficiency) for the G71P gas furnace, gives and AFUE rating of 95%, they have a variable speed inducer (necessary for variable capacity operation), and it has a dual fuel capability just in case you wanted to hook it up to a heat pump and use it for back up heating for the heat pump. Many manufacturers have this option for their gas furnaces and this is the recommended back up heating for heat pumps because it is typically (depending on where you live and how much you pay for electricity) it is cheaper than having electric back up heating which most heat pumps have.
• Duralok Plus® Heat Exchanger, SureLight® Igniter, SureLight® Control Board, Limited Lifetime Warranty on heat exchanger, and the ten year limited warranty are the features listed under Reliable Performance. This is all very good but I would make sure the control board was listed as one of the items on the ten year limited warranty. These boards are usually very expensive not including the labor to have a Lennox technician troubleshoot and install the board.

Overall Lennox gets a decent review from me. As I said you will probably pay a little more for the Lennox but you should receive good reliable and efficient equipment and service from your local Lennox dealer.

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