Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The 0502 heating and DHW models are the same smallest condensing DynaFlame size — 500 MBTU/hr input, 475 MBTU/hr output, 95% thermal efficiency — certified for different applications: hydronic heating (ANSI Z21.13 / CSA 4.9) or domestic hot water (ANSI Z21.10 / CSA 4.3).
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Camus DynaFlame DFW 0502 (Condensing Heating) | Camus DynaFlame DFW 0502 (Condensing DHW) |
|---|---|---|
| Input, maximum | 500 MBTU/hr | 500 MBTU/hr |
| Output, maximum | 475 MBTU/hr | 475 MBTU/hr |
| Thermal efficiency | 95 % | 95 % |
| Turndown ratio | 5:1 | 5:1 |
| Shipping weight | 593 lb | 593 lb |
| Venting | Cat. I 5" · Cat. III up to 50 ft 4" · Cat. III up to 100 ft 6" · outdoor 4" | Cat. I 5" · Cat. III up to 50 ft 4" · Cat. III up to 100 ft 6" · outdoor 4" |
| Certification | CSA International design certified; ANSI Z21.13 / CSA 4.9 | CSA International design certified; ANSI Z21.10 / CSA 4.3 |
Camus publishes two condensing spec sheets for the 502–6024 generation: a hydronic-heating sheet (99-0145 Rev 01) and a domestic-hot-water sheet (99-0144 Rev 01). Both print the same size table, and for the 0502 size both print 500 MBTU/hr input and 475 MBTU/hr output with a 593 lb shipping weight, 5:1 turndown (minimum 20% firing rate) and up to 95% thermal efficiency.
What differs is the certification and the published capacity basis. The heating model is design certified to ANSI Z21.13 / CSA 4.9 for hydronic heating; the DHW model is certified to ANSI Z21.10 / CSA 4.3 and its spec sheet adds recovery-capacity rows (for the 0502: 569 GPH / 2,154 LPH at a 100°F rise). Both share the 439 stainless six-pass watertube exchanger at 160 psig and Category II/IV venting.
The choice is the application, not the size: a hydronic plant uses the heating certification, while a domestic-hot-water system uses the DHW model and its recovery ratings. The official heating sheet prints the model designation DF(N,P)W for the heating range — Boilers.ca reproduces that printed code and records the discrepancy in the model editor notes.
Camus Hydronics
The Camus DynaFlame DFW 0502 is the condensing hydronic-heating size of Camus' stainless-steel watertube line: 500 MBTU/hr input, 475 MBTU/hr output, up to 95% thermal efficiency and 5:1 turndown.
Camus Hydronics
The Camus DynaFlame DFW 0502 is the condensing domestic-hot-water size of Camus' stainless-steel watertube line: 500 MBTU/hr input, 475 MBTU/hr output, up to 95% thermal efficiency and 5:1 turndown.
They are the same 0502 condensing size published under two certifications: hydronic heating (99-0145) and domestic hot water (99-0144). Ratings for input, output, weight and efficiency match.
The DHW model: spec sheet 99-0144 prints recovery at 100°F/56°C, 80°F/44°C and 60°F/33°C rises. The heating sheet prints input/output and flow instead.
Both are 502-generation models rated up to 95% thermal efficiency with Category II/IV venting; the heating sheet's vent sentence says near-condensing while its title says Condensing, which Boilers.ca records as printed.
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 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.