Lennox G71P Furnaces | FurnaceCompare®

Lennox G71P Furnace Overview

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 17.5″ 16x25x1 (side)
16x25x1 (bottom)
All 21″ 1 16x25x1 (side)
1 20x25x1 (bottom)
All 24.5″ 1 16x25x1 (side)
1 24x25x1 (bottom)

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Consumer Reviews of Lennox G71P


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #8 of 29 Lennox Furnace
  • 41.67% of customers recommended

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Lennox G71P Furnace Reviews

Showing 6-10 of 12 reviews

"Never again"

1.0 rating
Very Unsatisfied

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!

[email protected]

"Lennox G71P failed third time in four years"

1.0 rating
Very Unsatisfied

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.

Minneapolis, MN

"Lennox is junk and the dealer Astar charges for everything."

1.0 rating
Very Unsatisfied

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.

new york

"I will never buy a Lennox again"

1.0 rating
Very Unsatisfied

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

Calgary Alberta

"Best furnace on the market. Hands down!!"

5.0 rating
Very Satisfied

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.

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.

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.

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