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Comparison
Verdict in brief
The Luna Duo-tec 1.110MP tops the Baxi heating line at 380 MBH input — 140 MBH above the 1.70MP — in a 23.63 x 25.38 x 37.44 in cabinet weighing 215.6 lb. Its page prints '95% Thermal Efficiency' where the 1.70MP prints 95% AFUE, a 10.5:1 turndown against 6.7:1, a fixed-speed pump against two-speed, no ENERGY STAR bullet, and copy positioning it for commercial applications.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Baxi Luna Duo-tec 1.70MP | Baxi Luna Duo-tec 1.110MP |
|---|---|---|
| Input (as printed) | 240 MBH | 380 MBH |
| Efficiency (as printed) | 95% AFUE | 95% Thermal Efficiency |
| Turndown (as printed) | 6.7:1 | 10.5:1 |
| Burner / heat exchanger (as printed) | Stainless steel ANSI 316L pre-mixed burner and heat exchanger | Stainless steel ANSI 316L pre-mixed burner and heat exchanger |
| Circulator pump (as printed) | Two-speed modulating pump with built-in air vent | Fixed speed pump built-in |
| Dimensions (as printed, W x D x H) | 17.75"(w) x 23"(d) x 30.06"(h) | 23.63"(w) x 25.38"(d) x 37.44"(h) |
| Weight (as printed) | 120.15 lb | 215.6 lb |
| Vent material (as printed) | Coaxial or two-pipe polypropylene | Coaxial or two-pipe polypropylene |
| Gas type (as printed) | Natural Gas / Propane | Natural Gas / Propane |
Both MP models are current on baxiboilers.com with no discontinued banner, printing the same ANSI 316L pre-mixed burner, anti-wind and flame-stabilization functions, electronic ignition, freeze-protection device, coaxial or two-pipe polypropylene venting and Natural Gas / Propane gas type.
The published figures diverge in ways worth flagging: the 1.110MP page prints '95% Thermal Efficiency' where the 1.70MP prints '95% AFUE', it carries no ENERGY STAR bullet, prints a fixed-speed pump and a 10.5:1 turndown, and its page copy says it is 'for commercial applications' — the 1.70MP is positioned for large residential and light commercial applications. Both MP pages print their turndown as a 'CHW mode' ratio, which Boilers.ca records as printed.
The 1.110MP is a substantially larger machine: 23.63 x 25.38 x 37.44 in at 215.6 lb against the 1.70MP's 17.75 x 23 x 30.06 in at 120.15 lb, with 380 MBH input against 240 MBH. A commercial load calculation and gas supply sizing decide between them; Boilers.ca documents the printed figures only.
The Baxi Luna Duo-tec 1.70MP is a 240 MBH wall-hung condensing heating boiler on baxiboilers.com — 95% AFUE as printed with a 6.7:1 central-heating turndown — modelled from its official current product page.
The Baxi Luna Duo-tec 1.110MP is a 380 MBH wall-hung condensing heating boiler on baxiboilers.com — 95% Thermal Efficiency as printed with a 10.5:1 central-heating turndown — modelled from its official current product page.
That is the wording on its official page: '95% Thermal Efficiency' appears where the smaller Luna Duo-tec pages print '95% AFUE'. Boilers.ca records each page's wording as printed.
23.63 in wide, 25.38 in deep and 37.44 in high at 215.6 lb, per the printed page bullets — about 95 lb heavier and 2.4 in deeper than the 1.70MP.
Its official page copy positions it 'for commercial applications'; the 1.70MP is positioned for large residential and light commercial applications. Confirm application suitability with a licensed contractor.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.