Find Local Contractors

1. I need a new:

2. My zip code is:

Lennox G71P Furnace

2.7 of 5 stars 12 reviews | #13 of 26 Furnaces
Updated: Nov 30, 2018 | Read more about Lennox Furnaces | G71P Warranty

Overview of G71P

The Lennox G71P is a (discontinued) variable speed gas furnace made for use in residential settings. It is also known as G71MMP. In 2008, the G71P won the Silver award from the Dealer Design Award Program. It is rated for 95% AFUE and is Energy Star qualified. This furnace may also qualify buyers to a federal tax credit, according to Lennox's product brochure.

Its technology includes a patented steel primary heat exchanger and stainless steel secondary heat exchanger. It is equipped with a variable-capacity gas valve and Lennox's Precise Comfort technology, which the company says controls temperature and airflow in small increments for more efficient use of fuel. The G71P can also be used with an electric heat pump. The Lennox company claims the G71P can save a household up to $1000 on utility costs per year.

Furnace Filters for the Lennox G71P

Air Flow Configuration Cabinet Width Filters
All 17-1/2" 1 16x25x1 filter
(side air return)
1 16x25x1 filter
(bottom air return)
All 21" 1 16x25x1 filter
(side air return)
1 20x25x1 filter
(bottom air return)
All 24-1/2" 1 16x25x1 filter
(side air return)
1 24x25x1 filter
(bottom air return)

Consumer Reviews of the G71P

  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
best product icon  What are the 10 Best Furnaces?
1 of 5 stars Vancouver BC
Date created: 2018-11-30

Breaks Down every year

Lennox and this furnace in entirely unreliable. Installed in 2008 and it has broken down every year including the very first year of install. Numerous blower motors and circuit board have been replaced. Do not buy Lennox.

1 of 5 stars Woodburn, OR
Date created: 2018-06-14

Okay until it failed.

This a Lennox g71mpp series, installed about 10 years ago. For the last 5 years the yearly maintenance tech has noticed rust on the primary heat exchanger but wasn't sure why. This year another tech discovered the problem. The secondary heat exchanger was leaking condensate, dripping down on the primary. The part was covered under warranty but not labor. Replacing it was a 6 hour job and $1,200 labor cost. We bought it for it's high efficiency which seemed a responsible thing to do but even setting aside that our gas bill savings will never equal $1,200, the energy required to build and ship a replacement heat exchanger makes for an big picture efficiency loss, not gain. Not at all happy with what seems shoddy design, materials choice or manufacturing process. Shouldn't we expect it to last more than 10 years or is this the current state of us manufacturing?

5 of 5 stars Kelowna, BC, Canada
Date created: 2016-03-05

Very satisfied

I had the Lennox G-71 installed in 2008. This is the best furnace I have owned by far.

1 of 5 stars Dallas, TX
Date created: 2016-02-18

Lennox equipment poor quality

We purchased the top of the line Lennox furnace / air handler and have 3 of them in my home. We had to replace one of the coils 2 years after install and just found out another unit has a leaky coil. Compared to all of the neighbors in our community who had Goodman low end units installed at the same time, no one has had this issue. I have subsequently found out Lennox had to settle a class action law suit as this issue is so prevalent. It is due to poor workmanship and low cost metals used in the coil. I would highly recommend not letting your contractor install a Lennox unit in your home.

5 of 5 stars Minneapolis, MN
Date created: 2016-01-22

Incredible comfort

I've had this furnace for 6 or 7 years and my house has never been more comfortable. It runs on low-fire most of the time, but it's not over- sized. I need the full rate for recovery in the morning, but once the house warms up I never notice the furnace again. It is super quiet and because it runs at a low fan speed, I never feel or hear a whoosh of air coming through the heat registers. It just quietly keeps the temperature in the house right where it's supposed to be with no overshoot.

1 of 5 stars [email protected]
Date created: 2014-03-21

Never again

This furnace is very unreliable. It is in its last year of warranty maybe one more year. A $500 motor went out this year and now something else is wrong because I have no heat again with an error code 125. My checkbook and my faith in Lennox is also giving an error code. Never again. Top of the line efficiency...I don't think so!

1 of 5 stars Minneapolis, MN
Date created: 2012-12-14

Lennox G71P failed third time in four years

Same or similar issue each time. Pressure switch fails. Ironic thing is that we replaced our nearly 20 year old Heil because we feared it would fail during the winter. So, for a 4 year old furnace to fail three times: totally unacceptable. I spent a lot of money and hopefully the hvac company will replace it for free. I'm probably dreaming but isn't it their responsibility to fight with Lennox to get their money back? I have spent enough days/ nights sitting here freezing. I will not ever buy a Lennox again.

1 of 5 stars new york
Date created: 2012-02-24

Lennox is junk and the dealer Astar charges for everything.

I paid over $20k for this unit and installation. in the two years i've had it, I have spent $600. in repair and today is it down again. two days with no heat. the first time Astar came in to repair it, the tech broke two light bulbs and said nothing. they left me w/o heat for over a week. they keep pushing for service (what a joke). Astar charges (too much in my opinion)for every repair and evaluation at the rate of $100. per evaluation. they repaired the lennox furnace a month ago and it isn't working again. they're due here this am to once again repair this 20k piece of junk. It's the g71.

1 of 5 stars Calgary Alberta
Date created: 2011-12-31

I will never buy a Lennox again

4 service calls since purchased 14 months ago. With our previous furnace we had one service call over 30 years.

5 of 5 stars
Date created: 2010-02-08

Best furnace on the market. Hands down!!

I bought the g71 modulating furnace 3 years ago and I have never been happier. Had a Carrier Weathermaker before. My last furnace had problems every year and was very expensive to fix. And with Carrier having heat exchanger lawsuits against them, I decided to change. The new g71 is so quiet, I can't even here the furnace run. It also gives me much better comfort. More even temperatures through out my 2 storey house. The company in Chatham (Postma) did a great job. It looks very neat. I always do my research on products and know that I bought the best comfort for my family.

5 of 5 stars
Date created: 2009-12-23

Lennox G71MPP 95% AFUE / XC21 20SEER AC

I purchased a new Lennox g71mpp 95% afue furnace with variable speed motor along with the xc21 20 seer air conditioner last November, 2008. Overall, I'd easily rate this as one of the best purchases I've ever made. By replacing my old (as in fifty-year-old!)Lennox pulse furnace, and a twenty-year old AC, I'm not only living in a better, more comfortable environment, but am also saving well over $200/month in utilities! Hats off to Lozier Heating & Cooling in West Des Moines, Iowa.

5 of 5 stars ON, Canada
Date created: 2008-09-04

Too Bad People Cant Trust Their Installers

I'm in the middle of a large renovation and am installing a g71 unit in my home. Old unit is Carrier but not overly happy with it. Possibly some of the issues are from not having the best installer. But my biggest rant is all you people who are suckered by bad maintenance companies!!! Then you slag the equipment!!! Doesn't take much time to investigate a problem on the web before someone feeds you a huge line of p__p. Wish everyone paid attention in school. Be a lot less people getting away with emptying your wallet with a ton of bs. These units, are awesome and will work for years if you find someone to service it that can be trusted!!!

Other G71P Reviews

Posters in online forums have generally positive things to say about this furnace, though some have experienced problems. In this forum thread, several posters say that problems with the G71MPP are often due to improper installation, rather than the furnace itself.

Find Local Contractors
1. I need a new:
2. My zip code is:

Lennox G71P Model Numbers

The G71P is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
G71MPP-36C-090 95 88,000
G71MPP-60C-090 95 88,000
G71MPP-60C-110 95 110,000
G71MPP-60D-135 95 132,000
G71MPP-60D-135-* 95 132,000

G71P Warranty

G71P furnaces carry a limited lifetime warranty on heat exchanger parts and a 10 year warranty on all other components.

Copyright 2002 - 2019