STELPRO SFECM SFECM1821 Electric Furnace | 17.5 kW - 240V

A 17.5 kW ECM furnace for better-controlled air, summer and winter

The idea: modulated elements, tailored airflow

The Stelpro SFECM1821 produces 17.5 kW at 240 V with individually framed elements modulated by an electronic board, like the whole SFE series. What changes is the motor: a 1/2 HP variable-speed ECM, which Stelpro highlights for constant airflow and better efficiency. 7-position potentiometers set the airflow for each mode, so continuous fan, heating and cooling do not run at the same speed.

The 18 in its model number is a code: Stelpro publishes 17.5 kW, an output between the 15 and 20 kW sizes.

Which homes it suits

Think of a two-storey house on the South Shore with a finished basement, heated through ducts. The basement stays cool while the upper floor warms up: a low-speed continuous fan helps move air between the levels. The SFECM1821 installs in the basement upflow, against a wall with zero clearance, horizontal, or downflow with the FSB2 adapter, sold separately.

It also suits the owner who is replacing an old furnace and wants the house ready for a central heat pump, without redoing everything the day it arrives.

Dry winters, humid summers: the extra connections

The SFECM board has terminals the SFE does not offer: a humidifier for winter, an air cleaner, and Y2 for two-stage cooling. With a central heat pump, Stelpro provides two modes. In Type A, the factory setting, the heat pump is downstream and the elements stay off during its call. In Type B, it is on the return side and the furnace makes up for its loss of capacity in cold weather. The board also compensates during defrost.

Installation and electricity

Stelpro publishes a total amperage of 75 A at 240 V. At 208 V, the amperage is 66 A and the output 13.2 kW. We check your electrical service during the free estimate, then the breaker and conductor sizes from the installation manual and the rating plate.

AirGreen, a family business established in Montreal for more than fifteen years, holds RBQ licence 5645-9605-01 for ventilation, refrigeration and electrical work. After the written quote, our technicians remove the old unit, install and connect the furnace, make the electrical connection, set each airflow to suit your ductwork and explain the thermostat to you. The 20 x 20 x 1 in filter is not supplied: we add it to the quote.

Taking the next step

Whether you are in Montreal, Laval, Longueuil, on the North Shore or the South Shore, ask for a free estimate. You will receive a written quote and, if you wish, a financing option.