Electronic Thermostat STELPRO ST302P 3000 W | Montreal, Laval, Longueuil, South Shore and North Shore

You can cut your electric heating bill without an app, without Wi-Fi and without an online account. The Stelpro ST302P proves it: this programmable electronic thermostat rated at 3000 W for electric baseboard heaters and convectors lowers and raises the temperature on its own, following a schedule you set once and for all. According to Stelpro, programming can bring up to 20% in energy savings. At AirGreen, it's the model we recommend to homeowners who want the automation of a schedule without the complexity of a connected device.

Simple programming for baseboard heating

The ST302P lets you set up to 4 periods on weekdays and 2 periods on weekends. That split fits the way most families live: wake-up, leaving, coming home and bedtime from Monday to Friday; wake-up and bedtime on Saturday and Sunday. Stelpro designed three-step programming that's quick to understand, even for someone who has never programmed a thermostat.

An example of an efficient schedule

In a bedroom, the schedule can call for a cool temperature at night, a slight rise at wake-up, a drop during the day when the room is empty, then a return to comfort in the evening. In the living room, it's the reverse: comfort in the morning and evening, a setback during work hours and at night. On weekends, two periods are enough. Once it's set, the thermostat follows this schedule day after day, without fail.

Protection during power outages

Power outages are part of a Quebec winter. The ST302P keeps its programming during an outage thanks to 2-hour protection: after a short outage, you don't have to redo your settings when the power comes back.

Precision and readability

The thermostat holds the temperature within ±0.5 °C (1 °F) using a thermistor. The set point range is 5 to 30 °C (41 to 86 °F), and the digital display works in °C or °F. This precision avoids the temperature swings typical of mechanical thermostats and contributes directly to the savings.

Capacity and installation

The ST302P runs on 120, 208 or 240 V: 150 to 1500 W at 120 V, 260 to 2600 W at 208 V and 300 to 3000 W at 240 V. That capacity covers the vast majority of bedrooms, offices and medium-sized rooms. It connects with 2 wires and mounts on the S3 mounting plate. It's certified to CSA C828-19 and comes in a white moulded plastic casing.

Who it's for

The ST302P is especially well suited to households whose week follows a regular rhythm: day jobs, kids at school, home in the late afternoon. It also appeals to landlords who want to offer an economical, self-contained thermostat without asking tenants to install an app. And it's a good option for people who'd rather avoid connected devices while still getting the regularity of an automatic schedule.

In the Stelpro family

The ST402P offers exactly the same programming features with a 4000 W capacity, for large rooms. The non-programmable models, like the ST302NP, rely on a manual ECO mode. The ST302P suits medium-wattage rooms with a regular schedule. In a typical house, the ST302P often goes in the bedrooms and the ST402P in the living spaces.

Technical specifications

• Type: programmable electronic line-voltage thermostat
• Systems: electric baseboard heaters and convectors (2-wire)
• Voltage: 120/208/240 V
• Load range: 150 to 1500 W at 120 V; 260 to 2600 W at 208 V; 300 to 3000 W at 240 V (max. 3000 W at 240 V)
• Programming: up to 4 periods on weekdays and 2 on weekends; three-step programming
• Protection: settings kept during a power outage (2 hours)
• Accuracy: ±0.5 °C (1 °F), thermistor sensing
• Set point: 5 to 30 °C (41 to 86 °F)
• Display: digital, °C or °F (selectable)
• Connection: 2-wire; S3 mounting plate
• Savings: up to 20% according to Stelpro
• Certification: CSA C828-19
• Colour: white, moulded plastic

Professional installation and schedule setup

Our qualified technicians shut off the circuit at the electrical panel, confirm there's no voltage and measure the wattage of the baseboard heaters being controlled. If it goes over 3000 W at 240 V, we suggest the ST402P. The ST302P is then mounted on its S3 plate, connected with two wires and powered back up. We set the time and day, then program a first schedule with you that fits your routine.

We also leave you a clear explanation of the three programming steps, so you can adjust the schedule as the seasons change or when your routine does, like a return to the office or an evening work schedule.

Tips to get the most out of programming

Program the warm-up a little before the time you want comfort: a baseboard heater needs time to warm up the room. Avoid deep setbacks in north-facing or poorly insulated rooms, which take longer to warm back up. And resist the urge to change the set point by hand every day: it's the consistency of the schedule that produces the savings.

Maintenance

Dust the thermostat and the baseboard heaters every fall. Keep the baseboards clear. If the time is lost after a long outage, set it again so the schedule stays accurate. The switch to standard time and to daylight saving time is also a good moment to check that the thermostat's clock is right and that your schedule still matches your routine.

Why AirGreen

A family-owned HVAC company for more than 15 years, holding an RBQ licence, with a showroom in Boucherville, AirGreen helps homeowners modernize their heating, from thermostats to heat pumps. To buy the Stelpro ST302P programmable thermostat and have it professionally installed, contact us. We work in Montreal, Laval, Longueuil, the North Shore and the South Shore.

Stelpro documents

Stelpro spec sheet (PDF) · Stelpro user guide (PDF)