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Utica Boilers · Series
The Oneida Series is Utica's current residential combi/condensing line: the CO (Combi) models — CO-90/150/200, producing domestic hot water up to 5.1 GPM — and the CH (Central Heat) heating-only models CH-80 through CH-180, all wall-hung on a stainless steel water-tube heat exchanger at 95.2% AFUE with up to 10:1 turndown. The commercial CH-299/399/499 sizes (95.1–95.6% as printed) are documented by Utica but not modelled here.
Series facts
95.2% AFUE printed for every residential Oneida model in the official brochure table; the product pages rate the series up to 95.2% AFUE with up to 10:1 turndown.
The Oneida Series is the current condensing line on Utica's official pages, in two residential flavours sharing one platform: the CO (Combi) models — three sizes from 80,000 to 200,000 BTU/hr input — produce domestic hot water up to 5.1 GPM alongside central heating, while the CH (Central Heat) models are five heating-only sizes from 80,000 to 180,000 BTU/hr input. Boilers.ca models the residential codes as printed on the official brochure table: CO-90/150/200 with combi:true and CH-80/100/120/150/180 as heating-only central-heat units, all at 95.2% AFUE with up to 10:1 turndown on the next-generation enhanced stainless steel water-tube heat exchanger.
Every residential size is wall-hung in the shared 28.2 x 17.4 x 16.9 in cabinet at 74–101 lb, vented as a Category IV direct-vent twin-pipe appliance with the included 3-in-1 adjustable vent connector (PVC, CPVC, polypropylene or stainless steel; flue 3" with a 2" reducer), with 3/4" NPT CH connections (1/2" NPT DHW on the combis), 3/4" NPT gas, cascade control to 16 boilers and a control display settable to 18 languages. Utica prices the residential line with a 10-year heat exchanger and 5-year parts limited warranty.
The commercial CH-299/399/499 sizes that Utica documents on a separate page — printed at 95.1% AFUE (ENERGY STAR), 95.5% and 95.6% thermal — are heavier floor-hung units with 1-1/2" NPT connections and 4"–6" flues, outside this residential series record. Boilers.ca records the Oneida series canadianStatus as 'unknown': the ratings on this record are the US-market figures Utica prints, and no official Canadian (NRCan/CSA) rating listing was verified on the pages checked on September 8, 2026, even though Utica's fr-CA page names a Canadian distributor contact. Gas work belongs with a licensed contractor against the residential IOM (E93.1907.035.915.C).
Highlights
10-year heat exchanger limited warranty and 5-year parts limited warranty (residential), as printed on the official Oneida CO and CH product pages.
Models
One canonical page per model with input, output and efficiency kept separate.
Utica Boilers
The Oneida CO-90 is Utica's 90 MBH-class wall-hung residential combi: 9 to 80 MBH central-heating input with DHW input from 9 to 90 MBH (2.5 GPM at a 70 °F rise), 95.2% AFUE, 74 MBH heating capacity and up to 10:1 turndown.
Utica Boilers
The Oneida CO-150 is Utica's 150 MBH-class wall-hung residential combi: 15 to 120 MBH central-heating input with DHW input from 15 to 150 MBH (3.7 GPM at a 70 °F rise), 95.2% AFUE, 110 MBH heating capacity and up to 10:1 turndown.
Utica Boilers
The Oneida CO-200 is Utica's 200 MBH-class wall-hung residential combi: 20 to 180 MBH central-heating input with DHW input from 20 to 200 MBH (5.1 GPM at a 70 °F rise), 95.2% AFUE, 167 MBH heating capacity and up to 10:1 turndown.
Utica Boilers
The Oneida CH-80 is Utica's 80 MBH-class wall-hung residential heating-only boiler: 8 to 80 MBH central-heating input at 95.2% AFUE with 74 MBH heating capacity, a 64 MBH net AHRI water rating and up to 10:1 turndown.
Utica Boilers
The Oneida CH-100 is Utica's 100 MBH-class wall-hung residential heating-only boiler: 10 to 100 MBH central-heating input at 95.2% AFUE with 92 MBH heating capacity, a 80 MBH net AHRI water rating and up to 10:1 turndown.
Utica Boilers
The Oneida CH-120 is Utica's 120 MBH-class wall-hung residential heating-only boiler: 12 to 120 MBH central-heating input at 95.2% AFUE with 110 MBH heating capacity, a 96 MBH net AHRI water rating and up to 10:1 turndown.
Utica Boilers
The Oneida CH-150 is Utica's 150 MBH-class wall-hung residential heating-only boiler: 15 to 150 MBH central-heating input at 95.2% AFUE with 139 MBH heating capacity, a 121 MBH net AHRI water rating and up to 10:1 turndown.
Utica Boilers
The Oneida CH-180 is Utica's 180 MBH-class wall-hung residential heating-only boiler: 18 to 180 MBH central-heating input at 95.2% AFUE with 165 MBH heating capacity, a 143 MBH net AHRI water rating and up to 10:1 turndown.
| Specification | Utica Oneida CO-90 | Utica Oneida CO-150 | Utica Oneida CO-200 | Utica Oneida CH-80 | Utica Oneida CH-100 | Utica Oneida CH-120 | Utica Oneida CH-150 | Utica Oneida CH-180 |
|---|---|---|---|---|---|---|---|---|
| Central-heating input, minimum | 9 MBH | 15 MBH | 20 MBH | 8 MBH | 10 MBH | 12 MBH | 15 MBH | 18 MBH |
| Central-heating input, maximum | 80 MBH | 120 MBH | 180 MBH | 80 MBH | 100 MBH | 120 MBH | 150 MBH | 180 MBH |
| output-max | — | — | — | — | — | — | — | — |
| AFUE | 95.2 % | 95.2 % | 95.2 % | 95.2 % | 95.2 % | 95.2 % | 95.2 % | 95.2 % |
| Turndown | Up to 10:1 | Up to 10:1 | Up to 10:1 | Up to 10:1 | Up to 10:1 | Up to 10:1 | Up to 10:1 | Up to 10:1 |
| vent-max-3 | — | — | — | — | — | — | — | — |
| vent-max-2 | — | — | — | — | — | — | — | — |
| Weight | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range | 74–101 lb across the residential range |
Read the full comparison: Utica Oneida CO-90 vs CO-150 →
Read the full comparison: Utica Oneida CO-150 vs CO-200 →
Read the full comparison: Utica Oneida CH-80 vs CH-100 →
Read the full comparison: Utica Oneida CH-100 vs CH-120 →
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Manuals
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.
Services for Utica Boilers boilers
CO is Utica's Combi line (domestic hot water plus central heating in one appliance) and CH is the Central Heat line — heating-only models that leave domestic hot water to a separate tank or water heater. The CO-90/150/200 and CH-80 through CH-180 codes are printed that way in the official brochure table.
95.2% AFUE for every residential model in the official brochure table, with the product pages rating the series 'up to 95.2% AFUE' with up to 10:1 turndown. Utica's commercial CH sizes print differently (95.1% AFUE on the CH-299, thermal figures on the CH-399/499).
Utica's French-Canadian distributor page names Morden National ((519) 627-0791) as the Canadian distributor contact, but the Oneida ratings on this record are the US-market figures Utica prints and no official Canadian rating listing was verified, so Boilers.ca records canadianStatus 'unknown'.
The Oneida Series Residential Boiler Installation, Operation and Maintenance Manual, Rev. C (doc E93.1907.035.915.C), linked on the official CO and CH product pages and on the model records here. Utica's commercial CH sizes use the separate commercial IOM (E93.1608.035.915.B).
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Sources and verification
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.