Utica Boilers · MAC/MAH (AI condensing)
Utica MAH-75
The Utica MAH-75 is the 75-class (smallest) central-heating model central-heating model of the MAH 'AI' condensing line: 92% AFUE (as printed on the sell sheet), 4.5:1 heating turndown and the 316L stainless steel heat exchanger. The MAH page prints '(While supplies last)' with no current documents, so this model is discontinued (sell-through).
Key figures
- Max input
- —
- Max CSA output
- —
- AFUE
- 92 %
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Utica MAH-75 in practice
The MAH-75 is the 75-class (smallest) central-heating model of Utica's MAH central-heating line — the wall-hung 'AI' condensing platform with the control that automatically sets up the boiler during initial startup, recognizes natural or LP gas without a conversion kit, and continuously monitors combustion. The MAH page prints a 4.5:1 heating-mode turndown for the MAH-75 and rates the line at up to 95% AFUE (the archived sell sheet prints 92% AFUE for the MAH-75).
Status as printed on September 9, 2026: the official page carries a '(While supplies last)' badge and prints 'Sorry, There are no current documents for this product!', with the Rev. A boiler manuals and sell sheets moved under 'Archived Documents' — so this model is recorded as discontinued (sell-through). The shared manual (PN 240013687, ch. 13.1) covers the whole MAC/MAH 75-205 family and stays downloadable for service.
This MAC/MAH platform is the same ECR 'AI' family Dunkirk sells as DCC/DCB. The ratings here are the US-market figures Utica prints; no Canadian listing was verified, so canadianStatus stays 'unknown'. Gas work belongs with a licensed contractor against the archived manual set.
Best suited to
- Homes or retrofit projects in the 75-class (smallest) central-heating model firing class
- Owners of an installed unit identifying the model and pulling the archived MAC/MAH documentation
- Heating-only systems that kept hot water on a separate appliance
Applicability and support
- Model number
- MAH-75
- Canadian availability
- unknown
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Utica Boilers. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Efficiency | ||
| AFUE | 92 % | 92% AFUE as printed for the MAH-75 on the official MAC/MAH sell sheet (archived on the product page); the MAH page itself prints 'up to 95% AFUE' for the line. |
| Venting and air | ||
| Venting | Coaxial polypropylene or 2-pipe polypropylene/CPVC/PVC | Venting as printed in the research headline: coaxial polypropylene 4"/2" or 5"/3", or 2-pipe polypropylene 2"/3", or 2-pipe CPVC/PVC. |
| Physical and connections | ||
| Dimensions (H x W x D) | 30" x 17-3/4" | Wall dimensions 30" H x 17-3/4" W as printed; depth is 13-9/16" or 21-1/2" (the 165/205 class) per the research headline. |
| Weight | 94-125 lb | 94-125 lb across the wall sizes as printed in the research headline (per-size weights are not itemized on the pages captured). |
| Heat exchanger | 316L stainless steel heat exchanger and burner | As printed on the official product page: MAC-205, MAC-150 and MAC-115 are also equipped with a stainless steel brazed-plate heat exchanger. |
| Operating limits and other | ||
| Turndown, heating mode | 4.5:1 | As printed on the official product page for this model. |
| Gas type | Natural gas or LP — recognized automatically | The AI control recognizes natural or LP gas; no conversion kit required, as printed on the page. |
Manuals
- MAC/MAH 75-205 Boiler Manuals Rev. A (PN 240013687, MGC-2209-REV-A)MGC-2209-REV-A (Rev. A), PN 240013687 · 2022-09
Alerts documented for this model
Frequently asked questions
Is the MAH-75 discontinued?
The official page prints '(While supplies last)' with no current documents, which Boilers.ca records as discontinued (sell-through); service literature stays available under 'Archived Documents'.
Is the MAH-75 a combi boiler?
No — MAH codes are central-heating only; Utica's combi versions of this platform carry MAC codes.
Does the MAC/MAH control require an LP conversion kit?
No — the AI control recognizes natural or LP gas automatically during setup; no conversion kit is required, as printed on the official pages.
Questions about the Utica MAH-75?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- Utica Boilers — MAH product page ('(While supplies last)') · accessed September 9, 2026
- MAC/MAH 75-205 Boiler Manuals Rev. A (PN 240013687) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.