Electronic Thermostat STELPRO ST202NP 2000 W | Montreal, Laval, Longueuil, South Shore and North Shore

The bathroom, the small bedroom, the office, the walk-in closet, the laundry room: all these rooms have one thing in common. They're heated by a single baseboard heater, often a low-wattage one, controlled for years by an old mechanical thermostat that clicks and lets the temperature drift by several degrees. The Stelpro ST202NP is the obvious replacement. This non-programmable electronic thermostat rated at 2000 W for electric baseboard heaters and convectors brings precise control, a freeze warning and a safety mode, in a simple format. It's made in Canada. At AirGreen, we recommend it as a first step toward better-controlled electric heating.

Electronic precision in small rooms

Going from a mechanical thermostat to an electronic one is one of the simplest and most cost-effective upgrades for a home heated with baseboards. The ST202NP holds the temperature within ±0.5 °C (±1 °F) of the set point, while a bimetallic thermostat often lets the room swing a lot more. According to Stelpro, this added precision can bring up to 10% in energy savings compared with a mechanical thermostat. The set point range is 5 to 30 °C (41 to 86 °F).

The freeze warning

The ST202NP includes a freeze warning that signals when the indoor temperature is low enough to pose a risk of freezing. It's a valuable feature in a little-used room, a basement bathroom, a cottage or an annex, where a drop in temperature could go unnoticed. It lets you step in before the situation affects the plumbing.

Safety mode

Safety mode lets you lock in a maximum temperature. In a rental unit, a child's bedroom or a shared bathroom, it stops anyone from turning the thermostat all the way up and leaving the baseboard running at full power. It's a simple way to avoid waste without taking away the occupants' ability to adjust their comfort.

Rooms where it makes a difference

The ST202NP is especially well suited to rooms where comfort depends on a single small baseboard heater. In a bathroom, it keeps a steady temperature without the swings that make stepping out of the shower unpleasant. In a home office, it avoids the cold-feet feeling that follows when a mechanical thermostat shuts off. In a guest room you rarely use, it lets you keep a low set point with confidence, since the freeze warning alerts you to any abnormal drop. In a rental unit, its safety mode helps the landlord keep consumption in check without depriving tenants of their comfort.

Quick installation

The ST202NP connects with 2 wires, which makes it a direct replacement for most mechanical thermostats. Installation is quick and clean. The white moulded plastic casing and the digital display, in °C or °F, give the room a more modern look.

Choosing the right capacity

The ST202NP controls 150 to 1000 W at 120 V, 260 to 1730 W at 208 V and 300 to 2000 W at 240 V. That capacity suits rooms heated by a baseboard heater of modest wattage. For bigger loads, Stelpro offers the ST252NP (2500 W), the ST302NP (3000 W) and the ST402NP (4000 W), which add a one-touch ECO mode. Our technicians check the wattage of each baseboard heater to suggest the right model.

Technical specifications

• Type: non-programmable electronic line-voltage thermostat
• Systems: electric baseboard heaters and convectors (2-wire)
• Voltage: 120/208/240 V
• Load range: 150 to 1000 W at 120 V; 260 to 1730 W at 208 V; 300 to 2000 W at 240 V (max. 2000 W at 240 V)
• Accuracy: ±0.5 °C (±1 °F)
• Set point: 5 to 30 °C (41 to 86 °F)
• Display: digital, °C or °F (selectable)
• Functions: freeze warning; safety mode (maximum temperature lock)
• Connection: 2-wire, quick installation
• Savings: up to 10% compared with mechanical thermostats, according to Stelpro
• Origin: made in Canada
• Colour: white, moulded plastic

Installation by our technicians and tips for everyday use

Replacing a baseboard thermostat is done on a 240 V circuit. Our qualified technicians shut off the power at the panel, confirm there's no voltage, then check the wattage of the connected baseboard heater to make sure it stays within the 2000 W capacity at 240 V. The ST202NP is then connected with two wires, mounted on the wall and powered back up. We set the display unit and, if you like, turn on safety mode with the maximum temperature of your choice.

If several rooms are involved, we prepare a replacement plan for the whole house, matching each room with the model whose capacity fits the installed load.

Saving in small rooms

In a bathroom, a slightly warmer set point only helps when you're using the room; the rest of the time, a few degrees less is plenty. In a bedroom, a cooler temperature at night helps you sleep and cuts consumption. In a storage room or laundry room, a low set point combined with the freeze warning protects the house without wasting heat. Added together, these small rooms weigh more on the winter bill than you'd think.

Maintenance

Dust the thermostat and the baseboard heater at the start of each heating season. In a bathroom, keep the baseboard clear of towels and baskets, which block the flow of warm air and throw off the temperature reading. If the freeze warning comes on, first check that the baseboard isn't blocked and that the circuit breaker is on, then contact us if needed.

Why AirGreen

AirGreen is a family-owned HVAC company with more than 15 years of experience, an RBQ licence and a showroom in Boucherville. We modernize electric heating in homes across the region and also install heat pumps that reduce reliance on baseboards.

Contact AirGreen to buy the Stelpro ST202NP thermostat and have it professionally installed. We work in Montreal, Laval, Longueuil, the North Shore and the South Shore.

Stelpro documents

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