THERMO 2000 Mini BTH Ultra 4.5 Electric Boiler | 4.5 kW - 240V

4.5 kW of hot water for a radiant floor, right from the wall

Who the Mini ULTRA 4.5 is for

A basement with a cold floor, a workshop you would like to use in January, a plex dwelling heated by a few hot-water baseboards: these are the situations where Thermo 2000’s Mini ULTRA 4.5 belongs. This wall-mounted electric boiler runs on a single 4.5 kW element and produces 15,354 BTU/h at 240 V, according to the manufacturer.

It heats the water of a hydronic circuit, whether a radiant floor, radiators or baseboards. Thermo 2000 also presents it as a back-up for a geothermal or solar system. Like the whole Mini ULTRA series, it emits no GHG on site and needs little maintenance.

A cold basement, a floor that stays warm

In Quebec, many basements sit on a concrete slab that stays cool all winter. A radiant floor fed by a small electric boiler deals with that comfort issue at the source, without forced air and without blower noise. Thermo 2000 highlights the Mini ULTRA’s quiet operation, designed for condos, houses, basements and garages.

The T2 UltraSmart controller reads the supplied outdoor sensor and adjusts the water temperature to the weather, using a MIN, STD or MAX curve. A slab does not need water as hot as a cast-iron radiator does, and that is what the presets by distribution system are for. The controller also shuts the heat off in mild weather and runs a pump purge.

On the electrical side, plan for a dedicated 240 V circuit with a 30 A breaker and Cu 10 / Al 10 wire. At 208 V, the output becomes 3.4 kW (16.3 A). Whether the house is in Laval, on the North Shore or in a Montreal plex, we check the voltage and the panel capacity before recommending this size.

Your installation, step by step

1. Free on-site estimate: the water loop, the area to heat, the panel and the mounting wall.
2. Written quote, including the circulator and expansion tank, which are not among the supplied parts.
3. Wall mounting of the boiler, connection to the loop through the 3/4 in female NPT connections, and installation of the 30 psi relief valve, temperature and pressure gauge and drain valve.
4. Electrical connection and outdoor sensor installation. AirGreen holds RBQ licence 5645-9605-01 in ventilation, refrigeration and electrical work.
5. Filling, purging and setting the controller for your distribution system.

The loop must respect the unit’s 30 psi maximum working pressure and provide the flow Thermo 2000 specifies: 3.0 US gpm at a 10 °F ΔT, or 1.5 US gpm at a 20 °F ΔT. We size the circulator accordingly.

AirGreen is a family business established in Montreal for more than fifteen years. We also install in Longueuil and throughout the South Shore.

Getting your quote

The manufacturer warrants the tank for 15 years and the electrical and mechanical components for 2 years. What remains is to confirm that 4.5 kW matches your space, and that is what our visit is for.

Book your free estimate, receive a written quote and, if you wish, use financing to spread out your payments.