EMERSON 80 Series 1F85U-42NP Thermostat | Montreal, Laval, Longueuil, South Shore & North Shore
Home all day and happy with one steady temperature: this no-schedule thermostat still runs up to 4 heat and 2 cool stages on a heat pump.
Quick facts
Whether you are retired, work from home or run a shop open all day, a schedule does little when the place is occupied from morning to night. The 80 Series 1F85U-42NP (EMERSON’s White-Rodgers line) is non-programmable. You pick the temperature, it holds it, and it handles up to 4 heat and 2 cool stages on a central heat pump.
One temperature, no schedule, every stage
- No schedule: you set the temperature by hand, anywhere from 7 to 37 °C (45 to 99 °F).
- Heat pump: up to 4 heat and 2 cool stages.
- Conventional: up to 2 heat and 2 cool stages, gas, oil or electric.
- Lock and limits: the keypad locks and the setpoint stays inside the limits you choose, useful in a shop or a rented unit.
- Auto changeover: it moves from heating to cooling on its own.
- 5 sq. in. screen: backlit and high-contrast.
Systems it accepts
Gas, oil or electric furnaces on 24 V or millivolt, and central heat pumps: yes. The manufacturer’s documents also cover 3-wire hydronic zone valves. They do not, however, provide dual-fuel control for this model. Baseboards, convectors, radiant ceilings, fan-forced heaters, electric floor heating and wall or ducted heat pumps need a different kind of thermostat.
Compared with its neighbours
The EMERSON 80 Series 1F85U-42PR runs the same 4/2 stages and adds a 7-day or 5-1-1 schedule with 4 periods per day. The EMERSON 80 Series 1F85U-22NP is also non-programmable but stops at 2 heat stages and 1 cool stage on a heat pump.
Setup done by AirGreen
With no schedule to enter, setup covers what matters: heat pump or conventional mode, the number of stages, setpoint limits and the keypad lock if you want it. The 1F85U-42NP is hardwired with a C wire or runs on batteries, depending on your existing wiring. The free in-home estimate is where those choices are made with you.
Manufacturer document: 80 Series spec sheet (R-4461-5). Sold and installed by AirGreen. We serve Montréal, Laval, Longueuil, the North Shore and the South Shore.
Key facts: EMERSON 80 Series 1F85U-42NP
Four things to know, then its ID card in twelve answers. “—” means the manufacturer does not publish it.
Is the EMERSON 80 Series 1F85U-42NP compatible with your heating?
Two steps, thirty seconds. The verdict takes your system and your wiring into account.
Full compatibility table
The terminals behind the thermostat
Tap an element to see what it does. A working diagram, not a substitute for the manufacturer’s installation guide.
Try the EMERSON 80 Series 1F85U-42NP before you buy
Raise the setpoint, change the mode: see how it responds.
Winter, Rate Flex D and rebates: what this thermostat changes
With Hydro-Québec’s Rate Flex D, electricity costs less most of the winter and more during a few peak hours. Turning the setpoint down a few degrees during those hours is what counts.
The EMERSON 80 Series 1F85U-42NP or its closest sibling?
The most useful comparison: the model right next to it in our catalogue.
The right thermostat in three questions
If this model is not the right one for you, the page says so and shows you which one is.
Products that go with the EMERSON 80 Series 1F85U-42NP
Parts named in its spec sheet that we sell and install.
Installed and set up by our technicians, in five steps
What we do at your place, in order. The on-site estimate is free.
- 01InspectionEquipment, stages to control and existing wiring.
- 02C wireCommon wire added if the model needs it and it is missing.
- 03MountingWall base, terminal wiring, cover plate if needed.
- 04SettingsEquipment type, stages, dual energy and accessories.
- 05Start-upConnection, app, schedule and tests with you.
EMERSON 80 Series 1F85U-42NP specifications
From the manufacturer’s sheet. Type a word: the list filters as you write.
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Frequently asked questions about the EMERSON 80 Series 1F85U-42NP
Short answers, no detours.
What does the EMERSON 80 Series 1F85U-42NP work with?
According to the manufacturer’s sheet: gas, oil or electric (millivolt and 24 V); heat pump; 3-wire hydronic zone valves.
Does it need a C wire?
Per the spec sheet, it can run on batteries; a common wire is still recommended when available.
Can it control electric baseboards?
No. It is a low-voltage (24 V) thermostat. 120/240 V baseboards need a line-voltage electronic thermostat.
Can it be controlled remotely?
Not directly: it has no built-in Wi-Fi.
What is the warranty?
5 years, per the manufacturer’s information.
Does AirGreen install it?
Yes. We sell and install this product in Montréal, Laval, Longueuil, the South Shore and the North Shore. The on-site estimate is free.
No question matches. Call us at 514 316-2973.
Your thermostat, installed and set up by our technicians
We check your system and wiring, install the thermostat, connect it and program it with you. One visit, one installed price.