Utica Boilers · Oneida (CO/CH)
Utica Oneida CH-100
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.
Key figures
- Max input
- 100 MBH
- Max CSA output
- —
- AFUE
- 95.2 %
- Min input
- 10 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Utica Oneida CH-100 in practice
The Oneida CH-100 is the 100 MBH-class heating-only model of Utica's current Oneida CH residential line — the official page describes the CH (Central Heat) models as five sizes from 80,000 to 180,000 BTU/hr input. The brochure table prints 10 to 100 MBH central-heating input at 95.2% AFUE with 92 MBH heating capacity and a 80 MBH net AHRI water rating; as a heating-only boiler it produces no domestic hot water itself, which stays with a separate tank or water heater on the system.
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 3/4" NPT CH supply/return with 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.
The official pages market the Oneida series as ENERGY STAR certified at 95.2% AFUE with cascade control to 16 boilers, an 18-language control display 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 fits inside 100 MBH of heating input
- Heating-only systems keeping domestic hot water on a separate tank or water heater
- Wall-hung installations on the shared 28.2 x 17.4 x 16.9 in Oneida cabinet
Applicability and support
- Model number
- CH-100
- 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 | 10 MBH | CH input minimum in MBH as printed in the official brochure table. |
| Central-heating input, maximum | 100 MBH | CH input maximum in MBH as printed in the official brochure table. |
| Output | ||
| Heating capacity | 92 MBH | Heating capacity in MBH as printed in the official brochure table. |
| Net AHRI water rating | 80 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. |
| 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; 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 CH-100 a combi boiler?
No — the CH models are central-heat only. Domestic hot water comes from a separate tank or water heater; Utica's combi versions carry CO codes.
What is the Oneida CH-100'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 CH-100 sit in the Oneida CH range?
It is the 100 MBH-class size; the residential CH range spans CH-80 through CH-180, and the commercial CH-299/399/499 sizes are documented separately by Utica.
Questions about the Utica Oneida CH-100?
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 CH-80 vs CH-100Comparison
- Utica Oneida CH-100 vs CH-120Comparison
- Utica Oneida CO-90Same series
- Utica Oneida CO-150Same series
- Utica Oneida CO-200Same series
- Utica Oneida CH-80Same 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 — Heat Only Modulating Condensing Gas Boiler, Oneida CH (residential) · 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.