THERMO 2000 BTH Ultra 480 15 Electric Boiler | 15 kW - 480V

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The 480 V version of the Thermo 2000 BTH ULTRA 15 is a 15 kW commercial wall-mounted electric boiler, supplied in three phase, with three 5 kW elements.

Model numberBTH ULTCA 480 15

15 kWat 480 V (51,180 BTU/h)
3 x 5 kW277 V elements, one stage
18.0 Aat 480 V, 30 A breaker
480 V · three phaseCommercial versionOutdoor sensor supplied
Ask for a quote

514 316-2973 · sales@airgreen.ca

Quick facts

Model numberBTH ULTCA 480 15
ManufacturerThermo 2000
Output15 kW at 480 V (51,180 BTU/h)
Power supply480 V, 3 phase, 60 Hz
Current18.0 A
Breaker30 A
Elements3 x 5 kW (277 V)

A 15 kW electric boiler for commercial buildings supplied at 480 V

What the 480 V BTH ULTRA 15 is

Thermo 2000 offers its commercial BTH ULTRA line in two three-phase voltages, 480 V and 600 V. This 15 kW model, or 51,180 BTU/h, is the 480 V version: its three 5 kW elements are designed for 277 V and heat together on a single stage. It is a 75 lb wall-mounted boiler that holds 3 US gallons of water and connects with 1 1/4 in female NPT fittings.

It is aimed at commercial and institutional buildings supplied at 480 V: a business or offices heated by radiant floors, an institutional space with hot water baseboards or radiators, or the replacement of a commercial boiler of the same voltage. Thermo 2000 designs it for new installations as well as replacements, and as backup for a heat pump, geothermal or solar.

Voltage first

Before talking about output, the voltage must be confirmed. A boiler designed for 480 V does not suit a 600 V building, and the reverse is also true. During the estimate, we check your building’s supply and, if needed, point you to the 600 V version of the line.

Once the voltage is confirmed, the supply is simple to plan. The BTH ULTRA 15 draws 18.0 A at 480 V; Thermo 2000 lists a 30 A breaker and copper or aluminum wire gauge 10.

Controls that follow the weather

Even on a single stage, the boiler benefits from the T2 UltraSmart controller. With the supplied outdoor sensor, it sets the water temperature on one of three curves (MIN, STD, MAX), and warm weather shutdown rests the unit when heat is not needed. Presets by distribution system, a backlit display, Boost mode, pump purge and a 24 V supply for the thermostat round out the package. Two high limits, automatic at 208 °F and manual at 227 °F, protect the boiler.

What AirGreen’s installation covers

The free on-site estimate covers the voltage, panel, loop and wall location. You then receive a written quote. Our technicians install the boiler, make the 480 V electrical connection and the loop connection (two reducers are supplied), 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 Montreal, Laval, Longueuil, on the South Shore and on the North Shore.

Ask for your free estimate: we confirm the voltage and output, then give you a written quote. Financing is available.

01 · What it is for

A hot water boiler for buildings supplied at 480 V

The commercial BTH ULTRA line comes in 480 V and 600 V three phase. This 15 kW version is aimed at commercial and institutional buildings supplied at 480 V, in new construction or replacement.

  • Business or offices supplied at 480 V and heated by radiant floors
  • Institutional space served by hot water baseboards or radiators
  • Replacing a 480 V commercial electric boiler
  • Backup for a heat pump, geothermal or solar system
Three 5 kW elements277 V elements on a 480 V three-phase supply, heating together on one stage.
Set by the weatherSupplied outdoor sensor, three curves (MIN, STD, MAX) and warm weather shutdown.
15-year warrantyThermo 2000’s commercial manual provides 15 years on the tank and 2 years on electrical and mechanical components.
02 · Specifications

Specifications

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

ManufacturerThermo 2000
Thermo 2000 designationBTH ULTRA 15 (commercial, 480 V three phase)
TypeWall-mounted electric hot water boiler
Output15 kW (51,180 BTU/h)
Power supply480 VAC, 60 Hz, three phase (277 V elements)
Current18.0 A
Breaker30 A
Suggested wire gaugeCu 10 / Al 10
Heating elements3 x 5 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 480 15
03 · Before installing

What to know before installing

  • This version requires a 480 VAC three-phase, 60 Hz supply: check the building’s voltage before choosing it.
  • Current of 18.0 A, 30 A breaker, suggested wire copper 10 or aluminum 10, according to Thermo 2000.
  • 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.
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

How do I know if my building is supplied at 480 V?

We check the voltage of the electrical service during the free estimate. If the building is at 600 V, the commercial BTH ULTRA line has a version for that voltage.

Which breaker and wire does it need?

Thermo 2000 lists a 30 A breaker and copper or aluminum wire gauge 10. The unit draws 18.0 A at 480 V.

Does the boiler adjust its heat?

This size runs on a single stage: its three 5 kW elements heat together. The T2 UltraSmart controller still sets the water temperature from the outdoor sensor and rests the boiler in warm weather.

What comes with the boiler?

The 30 psi relief valve, drain valve, two reducers, outdoor sensor and temperature and pressure gauge.

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 15 kW, 480 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.