Non-Programmable Mechanical Thermostat, Round, 40-90 Degree F
MPN
T87N1000/U
SKU
1850909
$81.63
In stock
4 Available At All US Supply Locations
Honeywell
View All Honeywell products
Honeywell T87N1000 Thermostat – Non-Programmable, 24V Manual Control for Conventional HVAC Systems
The Honeywell T87N1000 is a manual, non-programmable thermostat designed for precise temperature control in 24VAC heating and cooling systems. Known for its iconic round profile, this thermostat offers reliable operation for single-stage applications without requiring digital programming or complex configuration.
Product Features
- System Type: Compatible with 1-stage heating and 1-stage cooling systems, including standard forced-air and hydronic setups
- Adjustable Dial: Mechanical rotary interface allows for direct user temperature selection
- Fan Control: Supports Auto and On fan modes via integrated fan switch
- System Selector: Heat/Off/Cool system mode switch for simple manual operation
- Mercury-Free: Electronic switching eliminates the use of mercury components, improving safety and compliance
Technical Specifications
- Model Number: T87N1000/U
- Control Type: Mechanical with thermistor-based sensing
- Voltage Range: 20–30 VAC
- Mounting: Wall-mounted, horizontal orientation
- Dimensions: 3-11/16" diameter × 1-3/4" depth
- Humidity Range: 5% to 90% RH (non-condensing)
- Terminals: R, RC, W, Y, G, O, B
Installation Notes
The T87N1000 installs using standard low-voltage wiring practices and mounts to a wall or standard electrical box. It is designed for dry, indoor environments and should be installed level for accurate sensing. This model does not require batteries. Installation is straightforward for experienced HVAC professionals; verify transformer capacity and system compatibility prior to connecting.
Applications
- Single-stage heating and cooling (conventional or heat pump)
- Residential forced-air systems
- Fan coil units with basic manual control needs
Additional Notes for Contractors
- Non-programmable design reduces callbacks due to user error
- Minimal training required for operation—ideal for rental properties and light commercial jobs
- Backplate and mounting hardware included
Specifications
| Weight | 0.450000 |
|---|---|
| Length (inches) | 1 |
| Width (inches) | 3.688 |
| Height (inches) | 3.688 |
| Item Type | Thermostats |
| Brand | Honeywell |
| Display Type | Analog |
| Humidity Range | 5 to 90 % |
| Manufacturer | Ademco, Inc. |
| MPN | T87N1000/U |
| Overall Depth | 1-3/4 in |
| Sub Type | Mechanical Nonprogrammable Conventional Systems or HP |
| Stages Cool | 1 |
| Stages Heat | 1 |
| Warranty | 5 Years |
| Amperage Rating | 0.02-1.2 A |
| Color | Premier White® |
| Connection Type | Hardwired |
| Control Range | Control Range |
| Domestic/Import | Import |
| Fan Switching | Auto/On |
| Mounting Type | Round |
| Number of Stages | 1 Heat/1 Cool |
| Overall Width | 3-11/16 in |
| Power Source | Battery Assisted Power Stealing |
| Sensor Type | Thermistor |
| Switch Type | Relay |
| System Switching | Heat/Cool/Off |
| Thermostat Type | Low Voltage |
| Application | Conventional Systems, Heat Pumps with No Auxiliary Heat |
| Includes | Subbase |
| Primary Voltage | 20 to 30 VAC |
| Item Returns | This item can be returned |