Utica Boilers · MAC/MAH (AI condensing)
Utica MAC-115
The Utica MAC-115 is the 115-class (smallest) combi combi of the MAC 'AI' condensing line: 95% AFUE, on-demand DHW at 2.5 GPM (70 °F rise), 5.6:1 heating turndown and the 316L stainless steel heat exchanger. The MAC page prints '(While supplies last)' with no current documents, so this model is discontinued (sell-through).
Key figures
- Max input
- 93.5 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 16.6 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Utica MAC-115 in practice
The MAC-115 is the 115-class (smallest) combi of Utica's MAC combi line — the wall-hung 'AI' condensing platform the official page describes with artificial-intelligence control that automatically sets up the boiler during initial startup, recognizes natural or LP gas without a conversion kit, and continuously monitors combustion. The page prints DHW flow of 2.5 GPM at a 70 °F rise for the MAC-115 with a 5.6:1 heating-mode and 6.9:1 DHW-mode turndown, at 95% AFUE (ENERGY STAR certified).
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 115-class (smallest) combi firing class
- Owners of an installed unit identifying the model and pulling the archived MAC/MAH documentation
- Households that used the combi's on-demand domestic hot water
Applicability and support
- Model number
- MAC-115
- 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 |
|---|---|---|
| Input | ||
| Central-heating input, minimum | 16.6 MBH | CH input minimum in MBH as printed in the utica2 spec headline for this size. |
| Central-heating input, maximum | 93.5 MBH | CH input maximum in MBH as printed in the utica2 spec headline for this size. |
| Efficiency | ||
| AFUE | 95 % | 95% AFUE as printed on the official pages for this line. |
| Domestic hot water | ||
| DHW flow rate at 70 °F rise | 2.5 gpm | Domestic hot water flow at a 70 °F rise, as printed on the official MAC product page. |
| Turndown, DHW mode | 6.9:1 | As printed on the official MAC product page for this model. |
| 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", depth 13-9/16" or 21-1/2" | 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 plus stainless steel brazed-plate DHW heat exchanger | 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 | 5.6:1 | 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 MAC-115 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 MAC-115 a combi boiler?
Yes — the MAC models combine central heating with on-demand domestic hot water (up to 2.5 GPM at a 70 °F rise on the MAC-115).
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 MAC-115?
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 — MAC 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.