Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The FTCW140 and FTHW140 are the combi and heating-only versions of the same 140,000 BTU/h FT wall boiler: the FTCW adds integrated domestic hot water and its combi code table (Document 1487C), while the FTHW is heating-only with hot water from a separate tank (Document 1483C).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Laars FTCW140 | Laars FTHW140 |
|---|---|---|
| Maximum input (as printed) | 140 MBH | 140 MBH |
| Fuel | Natural gas or propane | Natural gas or propane |
| Domestic hot water | Integrated — the combi version produces domestic hot water in the combination boiler | None built in — heating-only model; hot water comes from a separate tank or water heater |
| Error reporting | Two-digit numeric codes with Soft Lock and Hard Lock classes per Section 6.1 of the installation manual | Two-digit numeric codes with Soft Lock and Hard Lock classes per Section 6.1 of the installation manual |
At the same 140,000 BTU/h rating the FTCW140 and FTHW140 are the closest possible cousins: both are wall-hung condensing FT units on the NGTB-900CP control, natural gas from the factory with propane field-convertible, and both are rated in the 95% AFUE series. What separates them is domestic hot water.
The FTCW140 is the combination model: the boiler produces domestic hot water itself, so no separate tank is needed, and its manual (Document 1487C) carries DHW and mixing-valve codes such as 32, 66 and 68. The FTHW140 is heating-only — hot water comes from a separate tank or water heater — and its manual (Document 1483C) documents the heating-side code set.
That difference flows into servicing: an FTCW140 error is read from the combi manual's Section 6.1 tables while an FTHW140 code is read from the heating-only manual, because the two tables are not identical. The choice between the two models is a hot-water question, not a heating question — a household's simultaneous-draw demand decides whether integrated combi hot water is worth it.
Laars Heating Systems
The Laars FTCW140 is the smaller FT Series Wall combination boiler: a wall-hung condensing combi rated 140,000 BTU/h on its manual cover (Document 1487C) with integrated domestic hot water and the FTCW combi code table.
Laars Heating Systems
The Laars FTHW140 is the mid-size FT Series Wall heating-only boiler: a wall-hung condensing unit rated 140,000 BTU/h on the manual cover, natural gas from the factory with propane field-convertible, on the NGTB-900CP control.
Integrated domestic hot water: the combi produces hot water in the same appliance, where the FTHW140 is heating-only and needs a separate tank or water heater for hot water.
The two-digit FT families overlap, but the FTCW140 uses the combi table in Document 1487C — which adds DHW and mixing-valve codes such as 32, 66 and 68 — while the FTHW140 uses Document 1483C. Read each code from the unit's own manual.
The FTHW140 suits homes that already have or prefer a separate hot-water appliance; the FTCW140 suits households wanting on-demand combi hot water. Both are sized by the same heat-loss calculation at 140 MBH.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.