Slant/Fin · Series
Slant/Fin Concept-21
The Concept-21 is a Slant/Fin boiler line (CB-50 through CB-180 models per the official I&O title) documented in the official library's 'Vintage' section — the archive placement is the only official status signal, with a full Concept-21 document set on the hub.
Series facts
- Type
- non-condensing
- Efficiency
- Unknown
- Fuel
- The official Concept-21 library hub prints no fuel statement; Boilers.ca records natural gas in its gas-only fuel taxonomy without asserting propane. The official I&O title documents the 'Concept-21 Series CB-50 CB-180' model family.
- Venting
- Unknown
- Models documented
- 0
- Warranty
- Not verified
About the Concept-21
Slant/Fin's official library indexes the Concept-21 under 'Vintage': the hub breadcrumb prints 'Slant/Fin Library > Vintage > Concept21' and the page carries no product copy or status wording — only the document set. The model family visible in the official I&O title is 'Concept-21 Series CB-50 CB-180' (manual CB-40-E-103); no ratings table is printed on the hub itself.
The Concept-21 hub posts (fetched 2026-09-09): the Concept-21 Series CB-50 CB-180 Installation and User manual CB-40-E-103, the Concept-21 CB-Series Parts List 1003, and general notices including Polarizing & Phasing 180, Anti-Freeze in Hydronic Systems 190, Flue-Gas Condensation Within Boilers 107 and Flood-Damaged Appliances Warning 113.
Boilers.ca records this hub from the Vintage section placement (per the batch8 SPECS interpretation) with productStatus 'discontinued' and canadianStatus 'unknown'. No model records are created in this hub-only pass; service of an installed unit belongs with a licensed contractor.
Highlights
- Official hub placement: 'Slant/Fin Library > Vintage > Concept21'
- Official I&O title documents the model family: 'Concept-21 Series CB-50 CB-180' (manual CB-40-E-103)
- Full document set on the hub incl. parts list 1003 and general notices (flue-gas condensation notice 107 among them)
- Hub-only record — no model records created
Models
Concept-21 models
One canonical page per model with input, output and efficiency kept separate.
Error codes and alerts
Concept-21 alerts
No alerts documented for this series yet.
Manuals
Official documents
- Concept-21 Series CB-50 CB-180 — Installation and User Manual (Pub. CB-40-E-103) · CB-40-E-103
- Concept-21 CB Series — Parts List (Pub. 1003) · 1003
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.
Services for Slant/Fin boilers
Frequently asked questions
Which models did the Concept-21 cover?
The official I&O title prints 'Concept-21 Series CB-50 CB-180' (manual CB-40-E-103); the hub page itself prints no ratings table, so Boilers.ca does not list per-model data.
Is the Concept-21 still sold?
Slant/Fin prints no 'Discontinued' sentence; the Concept-21 sits in the official 'Vintage' archive section, which Boilers.ca records as productStatus 'discontinued'.
Where can a Concept-21 owner find the manual?
On the official hub at slantfin.com/library/concept21/, which hosts the CB-40-E-103 installation and user manual and the CB-series parts list 1003 — linked from this hub page.
Talk to a boiler technician
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.
Sources and verification
- Slant/Fin — library hub: Concept21 (Vintage) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.