THERMO 2000 ComboMax Ultra 50 Electric Boiler with Integrated Hot Water | 4.5 kW - 240V

Hot-water heating and the home’s hot water, in the space of a single water heater

One appliance, two jobs

Thermo 2000’s ComboMax Ultra combines an electric boiler and an instantaneous water heater. The tank holds the heating water, 48 US gal in the 50 model. Parallel copper coils sit in that water: drinking water flows through them and heats up on the way, with no domestic hot water stored. According to the manufacturer, hot water arrives in under 7 seconds, and the absence of storage reduces the risk of Legionella.

The COMBOU50-4,5 is the smallest size in the series: a single 4.5 kW element on one stage, delivering 15,354 BTU/h at 240 V. It suits a condo, a small bungalow or a well-insulated dwelling heated by radiant floors or radiators, where heating needs are modest. Thermo 2000 publishes an output of 50 US gal of hot water in 10 minutes and 72 US gal in one hour, for water delivered at 110 °F, cold water at 40 °F and boiler water at 180 °F.

Why this size slips easily into a local home

In many homes in Montreal and Laval, the mechanical room is just a corner of the basement shared by the water heater, the electrical panel and the washer. The ComboMax Ultra 50 takes the space of a conventional water heater: 60 in high and 22 in in diameter. Replacing a boiler and a water heater with a single appliance frees up room and simplifies maintenance.

On the electrical side, this size asks little: a 30 A breaker and Cu 10 or Al 10 wire at 240 V, according to the manufacturer. If the building is supplied at 208 V, Thermo 2000 states that output is multiplied by 0.75; we take that into account when choosing the size.

The T2 UltraSmart controller manages both functions. It gives priority to domestic hot water, sets its temperature and runs the heating pump when the thermostat calls for heat. The thermostatic mixing valve, pre-mounted at the factory, tempers the water sent to the taps.

What AirGreen’s installation covers

We start with a free in-home estimate, in Longueuil, on the South Shore, the North Shore or elsewhere in Greater Montreal. We check the heating load, the existing system, the electrical panel and the location. You receive a written quote detailing the unit, the loop components and the work.

On installation day, the ComboMax Ultra is set in place, then connected by qualified personnel to the heating loop (1 in male NPT connections) and to domestic water (3/4 in female NPT connections). Most accessories arrive already mounted: pressure regulator with check valve, mixing valve, automatic air vent, temperature and pressure gauge and hot water relief valve. After the electrical connection, the loop is filled and purged, the controller set and hot water output checked.

AirGreen is a family business established in Montreal for more than fifteen years, holding RBQ licence 5645-9605-01 (ventilation, refrigeration and electrical).

The warranty published by Thermo 2000

The manufacturer covers the tank and coils for 15 years in residential use, 10 years in commercial use, and electrical and mechanical components for 2 years.

Let’s talk about your project: free estimate, written quote and financing available for your 4.5 kW ComboMax Ultra 50.