The Baxi Luna Duo-Tec is a modulating, condensing wall-hung gas boiler with an efficiency rating of 90.0% AFUE. It features a stainless steel pre-mixing burner and heat exchanger, and a stainless steel enhanced secondary heat exchanger on the combi model. A 7:1 modulation ratio provides increased efficiency and fuel savings. The backlit digital controller maintains optimal combustion and displays error codes, and removable front and side panels make the unit easier to service. The Luna Duo-Tec has the ability to accept and increase heating of preheated solar water, and is approved for closet installation.
We purchased a Baxi Duo for our home in November 2014. We have had at least 7 service calls to repair/ replace parts. We experienced at least 13 times when the boiler stopped working. Some of the items that have failed: mixing valve, flow pump, burner sensor and pressure tank. (Sorry, don't remember technical names for these parts) We live in Vermont and the Baxi is used for heating. This unit is so undependable that I would have a very difficult time leaving my home for extended period during winter. The warranty does not cover us anymore so we are paying for repairs. I wish I had purchased any other brand
"Efficiency at its best"
An amazing small compact boiler that hangs on the wall that replaces the car-sized boiler that once was there. Super quiet. Been in for 3 years and not a hiccup. I will say if they're not Baxi certified don't let them touch it. These are their own animal and you wouldn't let the G.M. technician fix your Audi S5, so why let a flannel shirt plumber touch your state-of-the-art heating equipment.
Other Luna Duo-Tec Reviews
There are very few comments on HVAC forums regarding the Luna Duo-Tec. A couple of posts on diynot.com discuss error codes and unit set-up.
Luna Duo-Tec Warranty
The warranty for the Baxi Luna Duo-Tec 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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