Electronic Thermostat HONEYWELL TH115-A-240S-B/U | Montreal, Laval, Longueuil, South Shore & North Shore

In Québec, most residential electric baseboards are powered at 240 V. For these installations, the Honeywell TH115-A-240S-B/U is a versatile programmable control that is slim and easy to read. It offers 7-day programming with four periods per day, a large backlit LCD screen and single-pole relay switching, suited to the most common heating circuits. Its profile, only 23 mm thick, keeps it discreet on the wall, and its hidden programming buttons keep the front uncluttered. It is the model we gladly recommend for upgrading an entire electrically heated home.

The 240 V single-pole version of the TH115-A line

The TH115-A-240S-B controls baseboards, radiant ceilings, convectors and fan-forced heaters on 240 V or 208 V circuits. Its maximum load is 16.7 A resistive, which is 4000 W at 240 V or 3475 W at 208 V. The single-pole (SPST) relay is epoxy-encapsulated to reduce switching noise. Advanced temperature control narrows the gap between the setpoint and the actual temperature, for more consistent comfort than a mechanical thermostat provides.

Designed for Québec seasons

The ON/STANDBY switch lets you put the heating to rest at the end of the season without losing the programming. Daylight saving time changes happen automatically in spring and fall. Battery-free backup keeps your settings during a power outage, so you do not have to reprogram every thermostat in the house after a storm. Vacation mode holds a reduced temperature while you are away, and the Early Start function reaches the target temperature at the scheduled time.

Useful compatibility

The TH115-A-240S-B is compatible with Aube RC840 series relays and with the Aube CT240/CT241 telephone controller. It carries UL and CSA approvals (CAN/CSA-C828-06). This compatibility gives you flexibility for installations that call for it, for example when a relay is part of the heating system design.

Technical specifications

• Stage: 1 heating, electric resistance heating
• Equipment: electric baseboards, radiant ceilings, convectors or fan-forced heaters
• Voltage: 240/208 VAC, 50/60 Hz
• Maximum load: 16.7 A resistive (4000 W at 240 V, 3475 W at 208 V)
• Single-pole switching (SPST relay), epoxy-encapsulated for quieter operation
• 7-day programmable, 4 periods per day
• Large backlit LCD screen; heating power indicator
• ON/STANDBY switch for the end of the season
• Early Start; temporary override; hidden programming buttons
• Vacation mode; automatic daylight saving time change
• Battery-free backup: no reprogramming after an outage
• Setting range: 5 to 30 °C (40 to 86 °F)
• Compatible with Aube RC840 relays and the Aube CT240/CT241 telephone controller
• UL and CSA approvals (CAN/CSA-C828-06); hardwired, no batteries
• Dimensions: 124 x 70 x 23 mm (4.9 x 2.8 x 0.9 in.)
• Colour: white

What our technicians check

Replacing an electric heating thermostat is a chance to check the condition of the circuit. Our technicians look at the condition of the wires in the box, the quality of the old connections, the actual voltage and the total wattage of the connected heating units. These checks confirm that the chosen model suits the load, and then it is wired correctly. Once the control is in place, we run a heating test and check that the room temperature responds as expected. When several rooms have old mechanical thermostats, we can replace them all in a single visit.

Programming without the hassle

The programming buttons are hidden under the front cover: day to day, only the temperature adjustment buttons are visible, which prevents accidental changes. During installation, our technicians set the time and a first schedule with you. You can then temporarily override the program with a single button, for example to warm up the room on a bitterly cold evening; the program resumes at the next period. When you equip several rooms in the house with the same model, you only learn it once, and everyone in the family knows how to adjust their room.

Everyday comfort and savings

A well-set heating schedule lets you enjoy a warm house when you are there and save when you are not. That is especially useful in Québec, where the heating season lasts a good part of the year. The programmable thermostat applies the same settings every day, then lets you temporarily change the setpoint when needed, for example on a day off or a cooler evening. You stay in control without losing the benefits of the schedule.

240S, 240D or 120S: choosing the right version

The TH115-A comes in three line voltage versions. The TH115-A-240S-B/U, shown here, is single-pole and handles up to 4000 W at 240 V: it is the most common version for residential baseboards. The TH115-A-240D-B/U is double-pole and handles up to 3600 W at 240 V, for installations where both conductors of the circuit need to be controlled. The TH115-A-120S/U is for units powered at 120 V, up to 2000 W. For those who do not need programming, the TH114-A-240S-B/U offers the same slim housing in a non-programmable version.

Maintaining your electric heating

The electronic thermostat has no moving parts to replace, which makes it very durable. Maintenance comes down to keeping the housing clean and unobstructed. The units it controls do deserve a little attention, though: dust the baseboards and convectors before the cold season, make sure nothing blocks the air outlet of unit heaters, and visually check older units. If a baseboard gives off an unusual smell or shows signs of overheating, turn off its circuit and have it inspected.

An installation designed for your home

We do not sell a thermostat the way you sell a box off a shelf. Every AirGreen recommendation starts from your actual installation: type of unit, voltage, number of conductors, location of the box and your family's habits. As a Montréal family HVAC business active for more than 15 years and holding an RBQ licence, we serve Montréal, Laval, Longueuil, the North Shore and the South Shore. Our technicians come with the tools needed to check the circuit, install the control level, run operating tests and show you the settings that matter. You are left with a clean installation and a thermostat you know how to use. To see the products up close, our showroom in Boucherville is open to you.

To order this thermostat and have it installed correctly the first time, contact AirGreen. Our team serves Montréal, Laval, Longueuil, the North Shore and the South Shore, and every installation ends with complete tests and a short demonstration of the settings.