Baxi Luna 3 Comfort Boilers

Baxi Luna 3 Comfort Boiler Overview

The Baxi Luna 3 Comfort is a modulating wall-hung gas boiler with an efficiency rating of 85.5% AFUE. One of the two models of the Luna 3 Comfort, the 310 fi, is a combination heating and DHW boiler which prioritizes to domestic hot water and does not mix boiler water with domestic hot water. The nickel-chrome, stainless steel design of the premix burner and primary heat exchanger provide resistance to corrosion and low heat inertia. A direct vent and sealed combustion chamber provide quiet operation, and the Luna 3 Comfort is approved for closet installation.

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Consumer Reviews of Baxi Luna 3 Comfort


  • Very Satisfied
  • Somewhat Satisfied
  • Neutral
  • Somewhat Unsatisfied
  • Very Unsatisfied
  • #3 of 6 Baxi Boiler
  • 10% of customers recommended

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Baxi Luna 3 Comfort Boiler Reviews

Showing 1-5 of 10 reviews


1.0 rating
Very Unsatisfied

Sold and installed by Bryan's Fuels in Orangeville. Nothing but trouble. We have been without heat for 2 months now waiting for a part. They can't seem to get the part. Terrible service. Let you freeze to death and don't come up with an alternative solution. Marathon is the distributor. They have no idea! This heat exchanger is warrantied for 10 years and started leaking after 3 years. Junk!


Caledon, On

"Excellent Boiler that just gets it quietly done."

5.0 rating
Very Satisfied

I installed and commissioned this Baxi Comfort 310Fi boiler 4 years ago in conjunction with the whole house heating system I built out. It is quiet, efficient, amazingly powerful – and heats my 2000 sq ft house in central Washington State absolutely effortlessly. The only issue I have had with it was an intermittent flue pressure sensor in November that I rapidly and easily diagnosed aided by the boiler's excellent built in diagnostics and then had the replacement sensor on my doorstep the following day – problem solved. A superb boiler, I found it easy to install. However it is important to understand this boiler properly and follow the installation and commissioning advisories provided by Baxi carefully, faithfully and to the letter.

Tony Mitchelhill

Yakima, WA

"Piece of crap"

1.0 rating
Very Unsatisfied

Nothing but problems for 5 years. Consistently leaks and no heat situations. Marathon Industries in Canada who distribute the Baxi are terrible to deal with. They never call back. Say they don't have any records of any issues despite having come to the site themselves twice. Advise never to buy a Baxi.

Don Nowak

Barrie, Ontario, Canada

"Do not even think of buying!"

1.0 rating
Very Unsatisfied

I have 5 Baxi units for my apartment building. Within 2 years, all have had to be repaired.

R Lee

Brooklyn, NY

"Worst boiler ever"

1.0 rating
Very Unsatisfied

I have had nothing but problems with this boiler since day one. I've only had it for 2 1/2 years, and I've spent thousands on repairs! It's very difficult to find anyone to work on it, and nothing is ever under warranty. I would be very interested in starting a class action suit. Seems like there are a lot of disgruntled Baxi users.

Judy Storm

Long Beach, NY

Luna 3 Comfort Warranty

The warranty for the Baxi Luna 3 Comfort boiler is comprised of the following:

  • 10-year heat exchanger warranty
  • 1-year parts warranty (2 years if installed by a qualified installer who has earned the Baxi installer and service technician certification)

An optional 10-year extended parts and labor warranty is available.

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