THERMO 2000 BTH Ultra 600 9 Electric Boiler | 9 kW - 600V

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The Thermo 2000 BTH ULTRA 9 is a 9 kW commercial wall-mounted electric boiler, supplied at 600 V three phase, for hot water heating.

Model numberBTH ULTCA 600 9

9 kWat 600 V (30,708 BTU/h)
8.7 Aat 600 V, 15 A breaker
3 x 3 kW347 V elements, one stage
600 V · three phaseCommercial versionOutdoor sensor supplied
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514 316-2973 · sales@airgreen.ca

Quick facts

Model numberBTH ULTCA 600 9
ManufacturerThermo 2000
Output9 kW at 600 V (30,708 BTU/h)
Power supply600 V, 3 phase, 60 Hz
Current8.7 A
Breaker15 A
Suggested wireCu 14 / Al 12

A 9 kW electric boiler that connects directly to your building’s 600 V supply

What the commercial BTH ULTRA 9 is

Thermo 2000 offers its BTH ULTRA in two families: a residential line at 240 V single phase and a commercial line at 480 V and 600 V three phase. The BTH ULTRA 9 belongs to the second. It delivers 9 kW, or 30,708 BTU/h, with three 3 kW elements designed for 347 V, and connects to the 600 V three-phase supply found in many commercial and institutional buildings.

It is the smallest size of the 600 V version. It is aimed at spaces where heating demand is limited: an office or showroom heated by radiant floors, a shop, a small zone of an institutional building served by its own loop, or the replacement of a low-output commercial electric boiler. It can also back up a heat pump, geothermal or solar.

Simple to power, easy to set

At 600 V, the BTH ULTRA 9 draws only 8.7 A. Thermo 2000 lists a 15 A breaker and copper wire gauge 14 or aluminum gauge 12, which makes it easier to add to an existing commercial panel. The boiler runs on a single stage: its three elements heat together.

The T2 UltraSmart controller brings the convenience of modern controls. With the supplied outdoor sensor, it sets the water temperature on one of three curves (MIN, STD, MAX); warm weather shutdown rests the boiler when heat is not needed. The backlit display, presets by distribution system, Boost mode, pump purge and 24 V supply for the thermostat round out the package.

Wall-mounted, it weighs 75 lb, holds 3 US gallons of water and connects with 1 1/4 in female NPT fittings, with two reducers supplied. Its operating range is 50 °F to 190 °F (10 °C to 90 °C).

What AirGreen’s installation covers

We start with a free on-site estimate: building supply, panel, heating loop and wall location. You then receive a written quote that sets out the boiler and the planned work, which makes approval by the building manager or owner easier. Our technicians install the boiler, make the 600 V electrical connection and the loop connection, fill and purge the system, then set the controller.

Thermo 2000 covers the tank for 15 years and electrical and mechanical components for 2 years, according to its commercial manual. AirGreen is a family business established in Montreal for more than fifteen years, holding RBQ licence 5645-9605-01 in ventilation, refrigeration and electrical work.

Let’s talk about your building

We work in commercial and institutional buildings in Montreal, Laval, Longueuil, on the North Shore and on the South Shore.

Ask for your free estimate and receive a written quote; financing is available.

01 · What it is for

Hot water heating for a small commercial space supplied at 600 V

The BTH ULTRA 9 belongs to the commercial BTH ULTRA line at 480 V and 600 V three phase. It connects to the building’s 600 V supply and heats radiant floors, radiators or hot water baseboards.

  • Office, showroom or shop heated by radiant floors
  • Small zone of an institutional building served by a hot water loop
  • Replacing a low-output commercial electric boiler
  • Backup for a heat pump, geothermal or solar system
8.7 A at 600 VLow current on the three-phase supply: 15 A breaker, suggested wire copper 14 or aluminum 12.
Set by the weatherThe supplied outdoor sensor lets the T2 UltraSmart controller set the water on one of three curves (MIN, STD, MAX).
15-year warrantyThermo 2000 covers the tank for 15 years and electrical and mechanical components for 2 years, in the commercial version too.
02 · Specifications

Specifications

From the manufacturer’s documentation. A value the manufacturer does not publish is not listed.

ManufacturerThermo 2000
Thermo 2000 designationBTH ULTRA 9 (commercial, 600 V three phase)
TypeWall-mounted electric hot water boiler
Output9 kW (30,708 BTU/h)
Power supply600 VAC, 60 Hz, three phase (347 V elements)
Current8.7 A
Breaker15 A
Suggested wire gaugeCu 14 / Al 12
Heating elements3 x 3 kW
Stages1
Water volume3 US gal
Water connections1 1/4 in female NPT (return and supply)
Temperature range50 °F to 190 °F (10 °C to 90 °C)
High limitsAutomatic 208 °F (98 °C); manual 227 °F (108 °C)
Maximum working pressure30 psi (207 kPa)
Weight75 lb
ControlsT2 UltraSmart controller: backlit display, presets by distribution system, water temperature based on the outdoor sensor (MIN, STD, MAX curves), warm weather shutdown, Boost mode, pump purge, 24 V for thermostat and accessories
Manufacturer warrantyTank: 15 years; electrical and mechanical components: 2 years
Model numberBTH ULTCA 600 9
03 · Before installing

What to know before installing

  • 600 VAC three-phase, 60 Hz power supply (347 V elements): 8.7 A, 15 A breaker, suggested wire copper 14 or aluminum 12.
  • This size runs on a single stage: its three 3 kW elements heat together.
  • 75 lb wall-mounted boiler holding 3 US gal of water, 1 1/4 in female NPT connections (two reducers supplied).
  • Maximum working pressure of 30 psi (207 kPa); 30 psi relief valve supplied.
In the box
  • 30 psi relief valve
  • Drain valve
  • 2 reducers
  • Outdoor sensor
  • Temperature and pressure gauge
04 · Documents

Manufacturer documents

05 · See also

Explore the range

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06 · Questions

Frequently asked questions

Which buildings is this 600 V version for?

For commercial and institutional buildings supplied at 600 V three phase. Thermo 2000 places it in its commercial BTH ULTRA line, with 347 V elements.

What electrical protection does it need?

Thermo 2000 lists a 15 A breaker and copper wire gauge 14 or aluminum gauge 12. The unit draws 8.7 A at 600 V.

Does the boiler adjust its heat?

This size runs on a single stage. The T2 UltraSmart controller still sets the water temperature from the outdoor sensor, and warm weather shutdown rests it when heat is not needed.

Can it heat a radiant floor?

Yes. Thermo 2000 names radiant floors, radiators and hot water baseboards among the systems the BTH ULTRA serves.

What warranty does Thermo 2000 offer?

The commercial manual provides 15 years on the tank and 2 years on electrical and mechanical components.

AirGreen · Montréal, Laval, Longueuil, South Shore, North Shore

A 9 kW, 600 V BTH ULTRA, installed by AirGreen

Tell us about your project: we check the sizing, confirm availability and send you a quote. Or let our technicians install it for you.

RBQ 5645-9605-01Ventilation, refrigeration and electrical
Free estimateon site, for any installation
Quote in 24 hby phone or email
Bouchervilleshowroom

Specifications from the manufacturer’s documentation, checked on October 19, 2026.