Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Camus Dynaforce DR350 and Camus Dynaforce DR400 are two condensing boilers from the Camus Hydronics Dynaforce Series line. Published ratings: Camus Dynaforce DR350 at 350 MBTU/hr input, 329 MBTU/hr output and 99% efficiency; Camus Dynaforce DR400 at 399 MBTU/hr input, 375 MBTU/hr output and 99% efficiency. Camus Dynaforce DR400 lists 49 MBTU/hr more input than Camus Dynaforce DR350 (399 MBTU/hr against 350 MBTU/hr). Both list the same published efficiency of 99%. Both list the same published shipping weight of 500 lb.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Camus Dynaforce DR350 | Camus Dynaforce DR400 |
|---|---|---|
| Input, maximum | 350 MBTU/hr | 399 MBTU/hr |
| Output, maximum | 329 MBTU/hr | 375 MBTU/hr |
| Turndown ratio | 5:1 | 5:1 |
| Heat-exchanger water content | 5.7 US gal | 6.3 US gal |
| Weight | 500 lb | 500 lb |
| Venting | Category II or IV (SS / AL29-4C, PPE / polypropylene; PVC and CPVC for select systems — consult factory) | Category II or IV (SS / AL29-4C, PPE / polypropylene; PVC and CPVC for select systems — consult factory) |
| Water connections | 1 1/2" NPT | 1 1/2" NPT |
| Gas connection | 3/4" NPT | 1" NPT |
| Electrical requirement | 120 VAC, 60 Hz — 20 A max (boiler only) | 120 VAC, 60 Hz — 20 A max (boiler only) |
| Ignition | Direct igniter, 3 ignition tries then lockout | Direct igniter, 3 ignition tries then lockout |
| Modulation drive | Pulse-width modulation (DR300–DR1000) | Pulse-width modulation (DR300–DR1000) |
| Efficiency | 99 % | 99 % |
| Max. working pressure | 160 psig | 160 psig |
| System return temperature | 40 °F | 40 °F |
| Heat exchanger | 439 SS welded 12-pass watertube, 316L waterways | 439 SS welded 12-pass watertube, 316L waterways |
| Control | Honeywell SOLA touchscreen; Modbus RTU; cascade up to 8 | Honeywell SOLA touchscreen; Modbus RTU; cascade up to 8 |
| Certification | CSA (ANSI Z21.13 / CSA 4.9); ASHRAE 90.1 | CSA (ANSI Z21.13 / CSA 4.9); ASHRAE 90.1 |
Published ratings: the Camus Dynaforce DR350 is rated 350 MBTU/hr input, 329 MBTU/hr output and 99% efficiency; the Camus Dynaforce DR400 is rated 399 MBTU/hr input, 375 MBTU/hr output and 99% efficiency. Camus Dynaforce DR400 lists 49 MBTU/hr more input than Camus Dynaforce DR350 (399 MBTU/hr against 350 MBTU/hr). Both list the same published efficiency of 99%.
The boiler water content differs: the Camus Dynaforce DR350 lists 5.7 US gal, while the Camus Dynaforce DR400 lists 6.3 US gal. The gas connection differs: the Camus Dynaforce DR350 lists 3/4" NPT, while the Camus Dynaforce DR400 lists 1" NPT.
Both records print the same turndown (5:1), shipping weight (500 lb), venting (Category II or IV (SS / AL29-4C, PPE / polypropylene; PVC and CPVC for select systems — consult factory)) and water connections (1 1/2" NPT), per the cited sources.
Camus Hydronics
The Camus Dynaforce DR350 is the 350 MBH hydronic-heating size of Camus' fully condensing watertube line: 350 MBTU/hr input, 329 MBTU/hr output, up to 99% thermal efficiency and 5:1 turndown on the Honeywell SOLA control.
Camus Hydronics
The Camus Dynaforce DR400 is the 399 MBH hydronic-heating size of Camus' fully condensing watertube line: 399 MBTU/hr input, 375 MBTU/hr output, up to 99% thermal efficiency and 5:1 turndown on the Honeywell SOLA control.
The Camus Dynaforce DR400 lists 399 MBTU/hr, against 350 MBTU/hr on the Camus Dynaforce DR350, per the cited documentation.
Both list the same efficiency of 99%.
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.