Utica Boilers · Oneida (CO/CH)
Utica Oneida CO-150
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.
Key figures
- Max input
- 120 MBH
- Max CSA output
- —
- AFUE
- 95.2 %
- Min input
- 15 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Utica Oneida CO-150 in practice
The Oneida CO-150 is the 150 MBH-class combi of Utica's current Oneida CO residential line — the official page describes the CO (Combi) models as three sizes from 80,000 to 200,000 BTU/hr input producing domestic hot water alongside central heating, removing the separate water heater. The brochure table prints 15 to 120 MBH central-heating input with DHW input of 15 to 150 MBH and 3.7 GPM of DHW flow at a 70 °F rise, at 95.2% AFUE with 110 MBH heating capacity and a 96 MBH net AHRI water rating.
It is a wall-hung condensing design on the next-generation enhanced stainless steel water-tube heat exchanger with up to 10:1 turndown, direct-vent Category IV twin-pipe venting (the included 3-in-1 adjustable vent connector accepts PVC, CPVC, polypropylene or stainless steel; flue 3" with a 2" reducer) and CH supply/return at 3/4" NPT with 1/2" NPT DHW connections and 3/4" NPT gas. All residential Oneida sizes share the 28.2" x 17.4" x 16.9" wall-hung cabinet at 74–101 lb.
Utica prices the residential Oneida line for homes rather than plant rooms: ENERGY STAR certified at 95.2% AFUE with cascade control to 16 boilers, a control display settable to 18 languages, and a 10-year heat exchanger / 5-year parts limited warranty (residential). Ratings on this record are the US-market figures Utica prints; Boilers.ca found no official Canadian rating listings, so canadianStatus stays 'unknown'. Gas work belongs with a licensed contractor against the residential IOM (E93.1907.035.915.C).
Best suited to
- Homes whose heat-loss calculation and hot-water draws fit the 150 MBH-class combi
- Households replacing a boiler plus separate hot-water tank with one wall-hung appliance
- Wall-hung installations on the shared 28.2 x 17.4 x 16.9 in Oneida cabinet
Applicability and support
- Model number
- CO-150
- Canadian availability
- unknown
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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 | 15 MBH | CH input minimum in MBH as printed in the official brochure table. |
| Central-heating input, maximum | 120 MBH | CH input maximum in MBH as printed in the official brochure table. |
| Output | ||
| Heating capacity | 110 MBH | Heating capacity in MBH as printed in the official brochure table. |
| Net AHRI water rating | 96 MBH | Net AHRI water rating in MBH as printed in the official brochure table. |
| Efficiency | ||
| AFUE | 95.2 % | 95.2% AFUE as printed for the residential models in the official brochure table and on the product pages. |
| Domestic hot water | ||
| DHW input, minimum | 15 MBH | DHW input minimum in MBH as printed in the official brochure table. |
| DHW input, maximum | 150 MBH | DHW input maximum in MBH as printed in the official brochure table. |
| DHW flow rate at 70 °F rise | 3.7 gpm | Domestic hot water flow at a 70 °F temperature rise as printed in the official brochure table. |
| Venting and air | ||
| Venting | Twin-pipe direct vent, Category IV, with the included 3-in-1 adjustable vent connector | Venting approved in PVC, CPVC, polypropylene and stainless steel; flue 3" (2" with reducer) per the residential brochure. Gas work belongs with a licensed contractor. |
| Physical and connections | ||
| Gas supply pressure | Natural gas 3.5"–10.5" w.c. (nominal 7.0"); LP 8.0"–13.0" w.c. (nominal 11.0") | Per Table 4.1 of the residential IOM. |
| Dimensions (H x W x D) | 28.2" x 17.4" x 16.9" | All residential Oneida sizes share the same wall-hung cabinet, per the official brochure. |
| Weight | 74–101 lb across the residential range | The official brochure prints the 74–101 lb range across the residential models, which share one wall-hung cabinet; the product page summarizes the design as under 101 lb. |
| Heat exchanger | Stainless steel water-tube heat exchanger | Next-generation enhanced stainless steel water-tube heat exchanger, as printed on the official pages. |
| Electrical | ||
| Power supply | 120 V / 60 Hz | Per the residential specification sheets. |
| Operating limits and other | ||
| Connections | CH supply/return 3/4" NPT; DHW supply/return 1/2" NPT; gas 3/4" NPT | Wall-hung residential connection sizes per the official brochure. |
| Fuel | Natural gas or propane | Natural gas is the factory configuration; the official pages state the boiler is easily converted to propane (LP). |
| Turndown | Up to 10:1 | Up to 10:1 turndown as printed on the official product pages. |
| Warranty | 10-year heat exchanger limited warranty and 5-year parts limited warranty (residential) | As printed on the official Oneida CO and CH residential product pages. |
Manuals
Alerts documented for this model
Frequently asked questions
Is the Oneida CO-150 a combi boiler?
Yes — the CO models combine central heating with on-demand domestic hot water (DHW input 15 to 150 MBH, up to 3.7 GPM at a 70 °F rise), removing the separate water heater.
What is the Oneida CO-150's efficiency rating?
95.2% AFUE, as printed for every residential Oneida model in the official brochure table and on the product pages.
Where does the CO-150 sit in the Oneida CO range?
It is the 150 MBH-class size: central heating runs 15 to 120 MBH input and DHW 15 to 150 MBH, above the smaller CO sizes and below the CO-200.
Questions about the Utica Oneida CO-150?
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.
Compare and explore
- Utica Oneida CO-90 vs CO-150Comparison
- Utica Oneida CO-150 vs CO-200Comparison
- Utica Oneida CO-90Same series
- Utica Oneida CO-200Same series
- Utica Oneida CH-80Same series
- Utica Oneida CH-100Same series
- Utica Oneida CH-120Same series
- Utica Oneida CH-150Same series
- Utica Oneida CH-180Same series
- Oneida (CO/CH) series hub
- Buying guide
Sources and verification
- Utica Boilers — Combi Modulating Condensing Gas Boiler, Oneida CO · accessed September 8, 2026
- Oneida Series Residential Boiler Brochure (240013863) · accessed September 8, 2026
- Oneida Series Residential Boiler IOM, Rev. C (E93.1907.035.915.C) · accessed September 8, 2026
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.