Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Phase III SMART 60 and SMART 80 are adjacent SMART tanks: 56 versus 70 gallons domestic capacity, 243 versus 285 MBH boiler heating capacity and first-hour flows of 370 versus 435 gal/hr. The SMART 80 moves up to 1-1/2" domestic and boiler connections.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Triangle Tube Phase III SMART 60 | Triangle Tube Phase III SMART 80 |
|---|---|---|
| Domestic water capacity | 56 gal | 70 gal |
| Boiler water volume | 8 gal | 14 gal |
| Heating surface | 24 sq ft | 29 sq ft |
| Boiler heating capacity | 243 MBH | 285 MBH |
| First hour flow | 370 gal/hr | 435 gal/hr |
| Continuous flow | 325 gal/hr | 380 gal/hr |
| Minimum circulator flow | 16 GPM | 18 GPM |
| Domestic connection | 3/4" | 1-1/2" |
| Boiler connection | 1-1/4" | 1-1/2" |
| Empty weight | 190 lb | 315 lb |
The archived manual lists the SMART 60 at 56 gallons domestic, 8 gallons boiler water, 24 sq ft heating surface, 243 MBH coil, 100 gal/10 min peak, 370 gal/hr first hour, 325 gal/hr continuous and a 16 gpm minimum circulator flow.
The SMART 80 lists 70 gallons domestic, 14 gallons boiler water, 29 sq ft surface, 285 MBH coil, 120 gal/10 min peak, 435 gal/hr first hour, 380 gal/hr continuous and an 18 gpm minimum circulator flow.
Connections step from 3/4" domestic and 1-1/4" boiler on the SMART 60 to 1-1/2" on both for the SMART 80, and the empty weight rises from 190 to 315 lb.
Triangle Tube
The Triangle Tube Phase III SMART 60 is a discontinued 56-gallon indirect water heater with 8 gallons of boiler water, 24 sq ft of heating surface and a printed first-hour flow of 370 gallons at 50°F inlet / 140°F outlet / 200°F boiler supply.
Triangle Tube
The Triangle Tube Phase III SMART 80 is a discontinued 70-gallon indirect water heater with 14 gallons of boiler water, 29 sq ft of heating surface and a printed first-hour flow of 435 gallons at 50°F inlet / 140°F outlet / 200°F boiler supply.
The archived manual prints 56 gallons for the SMART 60 and 70 gallons for the SMART 80, with boiler water volumes of 8 and 14 gallons.
No — the SMART 60 prints 3/4" domestic and 1-1/4" boiler connections, while the SMART 80 prints 1-1/2" for both.
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.