THERMO 2000 BTH Ultra 600 22 Electric Boiler | 22 kW - 600V

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The Thermo 2000 BTH ULTRA 22 is a 22 kW commercial wall-mounted electric boiler at 600 V three phase, with six elements controlled over two stages.

Model numberBTH ULTCA 600 22

22 kWat 600 V (75,064 BTU/h)
21.2 Aat 600 V, 30 A breaker
2 stagessix 347 V elements
600 V · three phaseGeothermal or heat pump backupOutdoor sensor supplied
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514 316-2973 · sales@airgreen.ca

Quick facts

Model numberBTH ULTCA 600 22
ManufacturerThermo 2000
Output22 kW at 600 V (75,064 BTU/h)
Power supply600 V, 3 phase, 60 Hz
Current21.2 A
Breaker30 A
Suggested wireCu 10 / Al 10

22 kW at 600 V to back up the geothermal system or heat pump of a commercial building

A boiler that serves as backup or main source

When a commercial or institutional building heats its hot water loop with a geothermal system or a heat pump, it needs reliable backup for periods of extreme cold or maintenance. Thermo 2000’s BTH ULTRA 22 plays that role, and it can also heat a business, offices or an institutional space with baseboards, radiators or radiant floors on its own.

This wall-mounted boiler delivers 22 kW, or 75,064 BTU/h, on a 600 V three-phase supply. Its six 347 V elements are grouped in two stages. It belongs to the commercial BTH ULTRA line, offered at 480 V and 600 V, which Thermo 2000 designs for new installations as well as replacements.

Controls that work with your main source

The T2 UltraSmart controller modulates output over two stages based on the loop’s demand. With the supplied outdoor sensor, it sets the water temperature on one of three curves (MIN, STD, MAX); warm weather shutdown keeps the boiler at rest during periods when the main source is enough. When the cold sets in, Boost mode is available. The controller also provides a 24 V supply for the thermostat and accessories, pump purge and presets by distribution system.

The operating range is 50 °F to 190 °F (10 °C to 90 °C). An automatic limit at 208 °F and a manual limit at 227 °F protect the unit, and the supplied 30 psi relief valve protects the loop.

Electrical and connections

At 600 V, the BTH ULTRA 22 draws 21.2 A. Thermo 2000 lists a 30 A breaker and copper or aluminum wire gauge 10. The boiler weighs 75 lb, holds 3 US gallons of water and connects with 1 1/4 in female NPT fittings; two reducers are supplied.

What AirGreen’s installation covers

We start with a free on-site estimate. We look at the main source, the loop, the electrical supply and the wall location, then give you a written quote. Our technicians install the boiler, make the 600 V electrical connection and the loop connection, fill and purge the system, then set the controller to supplement your main source. 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 get your project started

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

Ask for your free estimate and a written quote for your BTH ULTRA 22; financing is available.

01 · What it is for

Electric backup for a commercial building heated by a renewable source

Thermo 2000 presents the BTH ULTRA as backup for a heat pump, geothermal or solar system, and as a main boiler. The 22 kW, 600 V version suits commercial and institutional buildings whose hot water loop calls for more output.

  • Backup for a geothermal system in a commercial building
  • Backup for a heat pump feeding a radiant floor
  • Main heat for a business or offices with baseboards or radiators
  • Replacing a 600 V commercial electric boiler
22 kW over two stagesSix elements grouped in two stages, modulated by the T2 UltraSmart controller based on demand.
21.2 A at 600 V30 A breaker and suggested wire copper 10 or aluminum 10, according to Thermo 2000.
Warm weather shutdownThe supplied outdoor sensor sets the water on one of three curves (MIN, STD, MAX) and rests the boiler in mild weather.
02 · Specifications

Specifications

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

ManufacturerThermo 2000
Thermo 2000 designationBTH ULTRA 22 (commercial, 600 V three phase)
TypeWall-mounted electric hot water boiler
Output22 kW (75,064 BTU/h)
Power supply600 VAC, 60 Hz, three phase (347 V elements)
Current21.2 A
Breaker30 A
Suggested wire gaugeCu 10 / Al 10
Heating elements6
Stages2
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, output modulation based on demand, 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 22
03 · Before installing

What to know before installing

  • 600 VAC three-phase, 60 Hz power supply (347 V elements): 21.2 A, 30 A breaker, suggested wire copper 10 or aluminum 10.
  • 75 lb wall-mounted boiler, 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.
  • When it serves as backup, the controller is set according to the building’s main source.
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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Same brand
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06 · Questions

Frequently asked questions

Can it back up a geothermal system?

Yes. Thermo 2000 presents the BTH ULTRA as backup for a heat pump, a geothermal system or a solar system. We set the controller so it supplements the building’s main source.

Which breaker and wire does it need?

Thermo 2000 lists a 30 A breaker and copper or aluminum wire gauge 10. The unit draws 21.2 A at 600 V.

How many elements and stages does it have?

Six 347 V elements, grouped in two stages. The T2 UltraSmart controller modulates output based on the loop’s demand.

How hot does it heat the water?

The operating range is 50 °F to 190 °F (10 °C to 90 °C). An automatic limit at 208 °F and a manual limit at 227 °F protect the unit.

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 22 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
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Specifications from the manufacturer’s documentation, checked on October 19, 2026.