Lochinvar Copper-Fin II CHN0992

The Copper-Fin II CHN0992 moves to the larger cabinet and 2-1/2" water connections: 360 to 990 MBH input with 842 MBH gross output and a 732 MBH AHRI net rating at 85% thermal efficiency.

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Key figures

Max input: 990 MBH
Max CSA output: —
AFUE: —
Min input: 360 MBH

Natural gasPropaneHeating-onlycommercial

Input is gas energy consumed; output is heat delivered. Never size from input alone.

Lochinvar Copper-Fin II CHN0992 in practice

The CHN0992 is the first Copper-Fin II size in the larger cabinet and the first on 2-1/2" NPT water connections (11-1/4" centers) and a 2" gas connection. The CHX I&O ratings table lists 360 to 990 MBH input, 842 MBH gross output and a 732 MBH AHRI net water rating at 85% thermal efficiency, with 3.3 gallons of water content; the CHE-Sub-11 submittal prints a 773 lb shipping weight with 10" vent and air-inlet sizes.

The cabinet changes to a 36" A dimension, 48-1/4" B, 33-1/2" C and 15-3/4" D, with an 8-3/4" H dimension. The SMART SYSTEM control with 8-boiler cascade, proportional firing up to 4:1, BMS integration and Category I/IV venting continue, and the submittal prints 85% AHRI-certified thermal efficiency with a 10-year limited warranty and 1-year parts.

Best suited to

Loads approaching 1,000 MBH with proportional firing
Plants stepping up to 2-1/2" water and 2" gas connections
Cascaded Copper-Fin II systems in the larger cabinet

Applicability and support

Model number: CHN0992
Canadian availability: available
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.

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Specifications

Published specifications

Values as published by Lochinvar. Units are shown with every value; notes flag conflicting sources or missing figures.

Lochinvar Copper-Fin II CHN0992 specifications
Specification	Value	Note
Input
Heating input, minimum	360 MBH	Per the I&O ratings table.
Heating input, maximum	990 MBH	Per the submittal sheet and the I&O ratings table.
Output
Gross output	842 MBH	Gross output per the submittal sheet ratings table.
Net AHRI water rating	732 MBH	Net AHRI rating based on a piping and pickup allowance of 1.15, per the submittal and I&O ratings-table notes.
Efficiency
Efficiency (thermal)	85 %	85% thermal efficiency (AHRI certified) printed in the CHE-Sub-11 submittal and on the product page; no AFUE is published.
Venting and air
Vent size	10"	Per the submittal and I&O ratings tables.
Air inlet size	10"	Per the CHE-Sub-11 submittal ratings table.
Venting	Category I (Type B double-wall) or Category IV (AL29-4C stainless steel); vertical or horizontal	Per the CHE-Sub-11 standard features and the CHX I&O venting section; DirectAire and powered sidewall options are listed in the submittal.
Physical and connections
Water content	3.3 gal	Per the I&O ratings table.
Space-heating water connections	2-1/2"	2-1/2" NPT on 11-1/4" centers per the CHE-Sub-11 submittal.
Gas connection	2"	Per the submittal and I&O ratings tables.
Shipping weight	773 lb	Shipping weight per the submittal sheet ratings table.
Dimension A	36"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension B	48-1/4"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension C	33-1/2"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension D	15-3/4"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension E	8-1/2"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension F	8-1/2"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension G	33-3/4"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension H	8-3/4"	As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Operating limits and other
Firing	Proportional, up to 4:1 turndown	Proportional firing up to 4:1 turndown per the CHE-Sub-11 standard features; the CHX I&O ratings table prints minimum inputs of 250/360/630 MBH by size.

Manuals

Alerts documented for this model

None documented yet.

Services

Related parts & service

Frequently asked questions

What are the CHN0992's ratings?

360 to 990 MBH input, 842 MBH gross output and a 732 MBH AHRI net water rating at 85% thermal efficiency, per the CHE-Sub-11 submittal and the CHX I&O ratings table.

When does the Copper-Fin II line change connections?

At the CHN0992: sizes 0402-0752 use 2" NPT water and 1-1/4" gas, while 0992-2072 use 2-1/2" NPT water on 11-1/4" centers and 2" gas, per the CHE-Sub-11 submittal.

Questions about the Lochinvar Copper-Fin II CHN0992?

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.

Call 778-909-5731 Request service

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Sources and verification

Lochinvar — Copper-fin II Commercial Gas Boiler (CHN0402) model page · accessed September 9, 2026
Copper-Fin II Commercial Gas Boilers (CH 402-2072) Submittal Sheet, CHE-Sub-11 · CHE-Sub-11 · accessed September 9, 2026
Copper-Fin II Commercial Gas Boilers (CHX Models only) I&O Manual, Rev A · Rev A · accessed September 9, 2026

Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.