There is no actual Baxi Luna boiler series. Instead, there are 3 different series of boiler with the Luna name.
Luna boilers are wall-hung, modulating condensing gas units. The three series of Baxi Luna boilers are the Luna Duo-Tec, which is up to 98% efficient; the Luna HT, which features both central heat-only and combi models with an efficiency rating of up to 92.5% AFUE; and the Luna 3 Comfort, with both central heat-only and combi models and an efficiency rating of up to 85.5% AFUE.
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