Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
The BFIT 400 and BFIT 650 share the same 25 5/8" width, 38 1/2" height, 2" water connections, 97% efficiency and 10:1 turndown, but the 650 adds 251,000 BTU/hr of input and 244,000 BTU/hr of output, grows 15 7/8" longer, steps the vent and gas connections up to 6" and 1", and adds 70 lb of shipping weight.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Bryan BFIT 400 | Bryan BFIT 650 |
|---|---|---|
| Input, low fire | 40,000 BTU/HR | 65,000 BTU/HR |
| Input, high fire | 399,000 BTU/HR | 650,000 BTU/HR |
| Output, high fire | 387,000 BTU/HR | 631,000 BTU/HR |
| Boiler horsepower | 12 BHP | 19 BHP |
| Thermal / combustion efficiency | 97 % | 97 % |
| Recovery rate (100°F rise) | 474 GPH | 772 GPH |
| Water volume | 3.8 gal | 6 gal |
| Fuel | Natural Gas or LP | Natural Gas or LP |
| Burner turndown | 10:1 | 10:1 |
| Low NOx emissions | <10 ppm | <10 ppm |
| Approx. shipping weight | 460 lb | 530 lb |
| Width | 25 5/8" | 25 5/8" |
| Length | 36 1/2" | 52 3/8" |
| Height | 38 1/2" | 38 1/2" |
| Water connections (out / in) | 2" FNPT / 2" MNPT | 2" FNPT / 2" MNPT |
| Vent and air intake | 4" | 6" |
| Gas inlet connection | 3/4" | 1" |
Bryan's submittals print the BFIT 400 at 40,000–399,000 BTU/hr input and 387,000 BTU/hr output, and the BFIT 650 at 65,000–650,000 BTU/hr input and 631,000 BTU/hr output. Both are 97% thermal/combustion efficient, 10:1 turndown and <10 ppm NOx, and both accept Natural Gas or LP.
The footprint change is one-directional: the 650 keeps the 25 5/8" width and 38 1/2" height but extends the cabinet from 36 1/2" to 52 3/8" long, with shipping weight rising from 460 to 530 lb. Both remain in the doorway-friendly group Bryan documents for models 400–2000.
Connection sizing changes with capacity: the 400 uses a 4" vent and 3/4" gas inlet, while the 650 moves to a 6" vent and 1" gas inlet, with water connections staying at 2" FNPT outlet / 2" MNPT inlet. Water volume rises from 3.8 to 6 gallons and heating surface from 34.8 to 52 sq ft.
Bryan Boilers
The Bryan BFIT 400 is a commercial condensing stainless-steel boiler rated 399,000 BTU/hr input and 387,000 BTU/hr output at 97% thermal/combustion efficiency, 12 BHP, with 10:1 turndown and <10 ppm NOx in Bryan's published submittal.
Bryan Boilers
The Bryan BFIT 650 is a commercial condensing stainless-steel boiler rated 650,000 BTU/hr input and 631,000 BTU/hr output at 97% thermal/combustion efficiency, 19 BHP, with 10:1 turndown and <10 ppm NOx in Bryan's published submittal.
Yes. Both print 25 5/8" wide and 38 1/2" high; the 650 is 52 3/8" long against 36 1/2" on the 400.
The BFIT 650; the BFIT 400 uses a 4" vent and air intake.
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.