THERMO 2000 AltSource 70 Thermal Mass Electric Boiler | 24 kW - 240V

A 71-gallon hot water reserve to back up your renewable source

An electric boiler designed as a backup

The 24 kW AltSource 70 looks nothing like a small wall-mounted boiler. It is a floor-standing unit that keeps 71 US gallons of water in its tank, a thermal mass Thermo 2000 puts at the heart of the line. Its main job is to back up a renewable-energy heating system: an air-to-water heat pump, a geothermal system or solar collectors. When the main source can no longer keep up, the electric elements take over and the hot water loop holds its temperature.

This 24 kW size, or 81,888 BTU/h at 240 V, suits a home heated with hot water that needs serious backup. It also suits homeowners who move forward in steps: the controller runs in standalone electric mode by default, so the boiler can heat on its own until the renewable source is added.

How it fits a Quebec home

Our winters put air-to-water heat pumps to the test. During a cold snap, a reliable backup source makes the difference between a comfortable home and a radiant floor that struggles to keep up. The AltSource answers that need with four 6 kW elements spread over four stages. With the supplied outdoor sensor, the T2 UltraSmart controller modulates output and water temperature based on the weather outside. A Boost mode and a warm weather shutdown round out the settings.

The boiler serves radiant floors as well as hot water baseboards or radiators. Thermo 2000 recommends a #60 expansion tank for baseboards or radiant floors, and a #90 for cast iron radiators. If you also want to use this reserve for domestic water, the optional copper coil heat exchanger heats or preheats it.

On the electrical side, plan for a 240 V single-phase circuit on a 125 A breaker. The unit draws 100 A at 240 V; connected at 208 V, it delivers 18 kW. At 24 in in diameter and 380 lb, it needs real floor space in the mechanical room.

What AirGreen’s installation covers

It all starts with a free on-site estimate. We look at the heating loop, the existing or planned main source, the floor space and your electrical panel’s capacity. You then receive a written quote that sets out the selected size and every step of the work.

On installation day, our technicians set the boiler in place, make the electrical connection, connect it to the hot water loop, fill and purge the system, then set the controller for your distribution system. Before leaving, we show you how to read the temperature and pressure gauge and what the main settings do.

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 plan your backup system

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

Ask for your free estimate: we confirm the size with you, you receive a written quote and financing is available.