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Lochinvar · Copper-Fin (CBN/CHN)

Lochinvar Copper-Fin II CHN1802

The Copper-Fin II CHN1802 covers 360 to 1,800 MBH input with 1,530 MBH gross output and a 1,330 MBH AHRI net rating at 85% thermal efficiency, with a 14" vent and 12" air inlet.

CurrentSold in Canada
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Key figures

Max input
1,800 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 CHN1802 in practice

The CHN1802 is the second-largest Copper-Fin II size: the CHX I&O ratings table lists 360 to 1,800 MBH input, 1,530 MBH gross output and a 1,330 MBH AHRI net water rating at 85% thermal efficiency, with 4.1 gallons of water content. The CHE-Sub-11 submittal prints a 1,100 lb shipping weight with a 14" vent and a 12" air inlet — the first size where those two diverge — on 2-1/2" NPT water and a 2" gas connection.

The cabinet B dimension reaches 82-1/4" with 11" E and F dimensions on the 36" A / 33-1/2" C / 15-3/4" D platform. The SMART SYSTEM control with 8-boiler cascade, proportional firing up to 4:1, front-end loading with Crest or Knight and Category I/IV venting continue, with 85% AHRI-certified thermal efficiency, a 10-year limited warranty and 1-year parts in the submittal.

Best suited to

  • Large commercial loads near 1.8 million BTU/hr
  • Plants with a 14" flue where the air inlet can stay 12"
  • Cascades using the SMART SYSTEM sequencer at scale

Applicability and support

Model number
CHN1802
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.

See all service areas

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 CHN1802 specifications
SpecificationValueNote
Input
Heating input, minimum360 MBHPer the I&O ratings table.
Heating input, maximum1,800 MBHPer the submittal sheet and the I&O ratings table.
Output
Gross output1,530 MBHGross output per the submittal sheet ratings table.
Net AHRI water rating1,330 MBHNet 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 size14"Per the submittal and I&O ratings tables.
Air inlet size12"Per the CHE-Sub-11 submittal ratings table.
VentingCategory I (Type B double-wall) or Category IV (AL29-4C stainless steel); vertical or horizontalPer 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 content4.1 galPer the I&O ratings table.
Space-heating water connections2-1/2"2-1/2" NPT on 11-1/4" centers per the CHE-Sub-11 submittal.
Gas connection2"Per the submittal and I&O ratings tables.
Shipping weight1,100 lbShipping weight per the submittal sheet ratings table.
Dimension A36"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension B82-1/4"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension C33-1/2"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension D15-3/4"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension E11"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension F11"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension G33-3/4"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Dimension H8-3/4"As labeled on the CHE-Sub-11 dimension drawing; dimensions are approximate per the submittal.
Operating limits and other
FiringProportional, up to 4:1 turndownProportional 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 CHN1802's ratings?

    360 to 1,800 MBH input, 1,530 MBH gross output and a 1,330 MBH AHRI net water rating at 85% thermal efficiency, per the CHE-Sub-11 submittal and the CHX I&O ratings table.

    Do the CHN1802's vent and air sizes match?

    No. The CHE-Sub-11 submittal prints a 14" vent with a 12" air inlet for the CHN1802 and CHN2072; the CHX I&O prints "12"/14"" in its combined air/vent column.

    Questions about the Lochinvar Copper-Fin II CHN1802?

    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 778-909-5731Request service

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    Sources and verification

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

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