Peerless Series TCII TCII-15

The Peerless Series TCII TCII-15 is a current commercial cast-iron steam or hot water boiler firing 4608 MBH gas (32 GPH oil) for 3851 MBH gross output, a 2974 MBH net steam rating (12392 sq ft) and a 3331 MBH net water rating at 83.1% gas thermal efficiency on a forced-draft power burner.

CurrentCanadian status unknown

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Key figures

Max input: —
Max CSA output: —
AFUE: —
Min input: —

Natural gasHeating-onlycommercial

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

Peerless Series TCII TCII-15 in practice

The Series TCII TCII-15 is one of the fifteen current commercial cast-iron sizes in Peerless' Series TCII line. Its row in the in-page ratings table prints 4608 MBH natural-gas input (32 GPH / 4480 MBH oil), 3851 MBH gross output, a 2974 MBH net steam rating (12392 sq ft at a 1.333 pickup factor) and a 3331 MBH net water rating (1.15 allowance), with 83.1% gas thermal efficiency and 85.7% oil thermal efficiency.

The line is built with flexible graphite port connectors and individual draw rods for a tight, secure section fit, and the official page notes that optional tankless coils can be added where domestic hot water is required. Firing is by forced-draft power burner for gas, oil or combination gas/oil applications, with catalog burner options including Beckett, Carlin, Power Flame and Riello.

Boilers.ca records the printed row for the TCII-15 for commercial service planning; no official Canadian-sales statement was found, so canadianStatus stays 'unknown', and commercial gas, combustion and venting work belongs with a licensed contractor against the Series TCII installation manual.

Best suited to

4608-MBH-class commercial gas loads (3851 MBH gross output)
Large hot-water or steam systems in the 1,000+ MBH class
Buildings that may add tankless coils for domestic hot water

Applicability and support

Model number: TCII-15
Canadian availability: unknown
Production status: current
ROMA supplies: Confirmed at consultation
ROMA services: Confirmed at consultation
Warranty: Not verified

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 Peerless Boilers. Units are shown with every value; notes flag conflicting sources or missing figures.

Peerless Series TCII TCII-15 specifications
Specification	Value	Note
Input
Gas input	4,608 MBH	Natural-gas input per the in-page Series TCII ratings table.
Oil input	32 GPH	Oil input 32 GPH (4480 MBH) per the in-page ratings table; the series record is gas-focused, and the oil column is recorded as printed.
Output
Gross output	3,851 MBH	Gross output per the in-page Series TCII ratings table.
Net steam rating	2,974 MBH	Net steam rating 2974 MBH (12392 sq ft) based on a pickup factor of 1.333 per the in-page table.
Net water rating	3,331 MBH	Net water rating based on an allowance of 1.15 per the in-page table.
Efficiency
Gas thermal efficiency	83.1 %	Gas thermal efficiency per the in-page Series TCII ratings table.
Oil thermal efficiency	85.7 %	Oil thermal efficiency per the in-page table (oil column recorded as printed).
Domestic hot water
Domestic hot water	Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater
Venting and air
Venting	Forced draft with a power burner	Forced-draft venting with a power burner per the product page; catalog burner options include Beckett, Carlin, Power Flame and Riello.
Operating limits and other
Fuel	Natural gas or oil (combination gas/oil configurations)	The official page lists gas, oil or combination gas/oil-fired applications; this record carries the printed gas and oil columns.
Construction	Cast iron with flexible graphite port connectors and individual draw rods	Per the product page; optional tankless coils can be added for domestic hot water.

Manuals

Series TCII Installation, Operation & Maintenance Manual (TC8058 R2, 2/21)TC8058 R2 · 2021-02
Catalog Literature — Series TCII, CUT-TCII R3 (7/22)CUT-TCII R3 · 2022-07

Alerts documented for this model

None documented yet.

Services

Related parts & service

Frequently asked questions

What are the Series TCII TCII-15 ratings?

4608 MBH gas input (32 GPH oil), 3851 MBH gross output, 2974 MBH net steam (12392 sq ft) and 3331 MBH net water at 83.1% gas thermal efficiency per the in-page ratings table.

Is the Series TCII TCII-15 a steam or hot water boiler?

Both trims are offered: the ratings table prints net steam (1.333 pickup) and net water (1.15 allowance) columns, so the same size is applied to either system type.

What burner options does the Series TCII TCII-15 support?

The line uses forced-draft power burners with catalog options including Beckett, Carlin, Power Flame and Riello; Boilers.ca records the printed gas column with the oil column noted as printed.

Questions about the Peerless Series TCII TCII-15?

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

Peerless Boilers — Series TCII product page (ratings table) · accessed September 9, 2026
Series TCII Installation, Operation & Maintenance Manual, TC8058 R2 (2/21) (PDF) · TC8058 R2 · accessed September 9, 2026
Catalog Literature — Series TCII, CUT-TCII R3 (7/22) (PDF) · CUT-TCII R3 · accessed September 9, 2026

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