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Robertshaw® 9801i2 Humidity and Temperature Digital Programmable Thermostat
Save Up to $150 a Year on Your Electric Bill With This EnergyStar® Thermostat!
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Robertshaw® 9801i2
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This is truly an easy to install and set up electronic thermostat. The display walks you through each step without complication. In addition, the Robertshaw® 9801i2 digital thermostat makes controlling your ambient humidity and temperature a snap.
In addition to being a functional and programmable thermostat and humidity regulator, this control has a sleek and attractive design that will delight customers with its aesthetic benefits as well. You will love it as a contractor because you can pre-program it with up to 5 service call reminders, which your customer will receive on a timely basis.
- Automatically adjusts for Daylight Saving time, so you don't have to re-program twice a year
- Save the planet one location at a time with this green EnergyStar® rated product, which has a five year limited warranty for peace of mind
- Choice of English, Spanish or French for the display options
- Your programs are saved into the programmable memory, so they are secure even in the event of a power loss
- Adjustable backlighting allows you to set the lighting of your display for maximum visual clarity even at night
- Allows for temporary override of settings anywhere from 10 minutes to 365 days for brief periods or extended vacations
- Easy to review your settings with the ability to view your full day programming
- Automatically changes will change from heat to cooling cycle so that you are always comfortable
- Even when you are neither cooling nor heating, the intermittent fan keeps air circulating and filtrating with very low power usage
| Electrical Rating | 24 Volt AC (18-30 VAC) |
|---|---|
| 1 amp maximum load per terminal (relay outputs) | |
| 3 amp total maximum load (all terminations combined) | |
| Temperature Control Range | 45°F - 90°F (7°C - 32 °C) |
| Accuracy | +/- 1°F (+/- 0.5°C) |
| Power Source | 24 VAC |
| Staging/ Application | 1 Heat / 1 Cool |
| System Configuration | Single-stage gas, oil or electric heating/cooling systems and single stage heat pump |
| Terminations | OS, IS, C, G, Y1, B, E/W1, O, R, L, H, D |
| Auto Changeover Deadband | Selectable from 2° to 8° F |
| Temporary Temperature Override | From 10 minutes to 365 days |
| Remote Sensor Capable | 1 indoor and 1 outdoor sensor |
| Comments | Multi-stage gas, electric, oil, heat pump and millivolt systems |
| Dimensions | 6.75"W x 4.372"H x 1.625"D |
| Weight | 12.8 oz |
| Standard | ISO 9001 Company |
| Patent Information | This product is covered by one or more of the following U.S. patents. Foreign patent rights may be pending. 4967382, 5803357, 6502758, 7000849, D301207, D462940 |
Comparison Chart
| Robertshaw 9801i2 |
Honeywell TH8110 |
White-Rodgers 1F97-391 |
|
| Menu Driven (Ease of Programming) | x | . | . |
| Installation Wizard | x | . | . |
| Displays Complete Program | x | . | . |
| Adjustable Backlighting | x | . | . |
| Cooling System Monitor | x | . | . |
| Heating System Monitor | x | . | . |
| Multi-Language; capable of up to 3 languages | x | . | . |
| 1/2 Degree Resolution | x | . | . |
| Time of Day Zoning | x | . | . |
| LED Status Indicators | x | . | . |
| Integrated Fossil Fuel Kit Converter for | x | . | . |
| Heat Pump Application | x | . | . |
| Events per Day: 2, 4, 6 | x | . | . |
| 5/2 Program | x | . | . |
| 24 Hour Program | x | . | . |
| 5/1/1 Program | x | . | . |
| Dehumidification | x | . | . |
| Intermittent Fan | x | . | . |
| Customizable Contractor ID | x | . | . |
| Remote Outdoor Sensor | x | . | . |
| Remote Indoor Sensor | x | x | . |
| Adjustable Residual Cooling | x | x | . |
| 12 or 24 Hour | x | x | . |
| Humidifier Pad Monitor | x | x | . |
| UV Light Monitor | x | x | . |
| Humidification | x | . | x |
| 7-Day Programming | x | x | x |
| Stages: 1H/1C | x | x | x |
| Large Display | x | x | x |
| Adjustable Timed Override | x | x | x |
| Adjustable Timed Hold | x | x | x |
| Automatic Daylight Saving Time Adjustment | x | x | x |
| Adjustable Temperature Limits | x | x | x |
| High/Low Balance Points | x | x | x |
| Adjustable Differential | x | x | x |
| Adjustable Compressor Short Cycle Protection | x | x | x |
| Battery Free Memory Retention | x | x | x |
| Manual Override | x | x | x |
| Resume | x | x | x |
| Auto Changeover | x | x | x |
| Gas/Electric | x | x | x |
| Single Stage Heat Pump Compatible | x | x | x |
| Line Powered | x | x | x |
| Programmable Fan | x | x | x |
| °F and °C | x | x | x |
| Air Filter Monitor | x | x | x |
| Vacation Setting | x | x | x |
| O & B Terminals | x | x | x |
| 4 Hour Reserve | x | x | x |
| Energy Efficient Recovery | x | x | x |
| Pre-set Program | x | x | x |
| Hidden Service Level | x | x | x |
| Security Key Pad | x | x | x |
| Temperature Recalibration | x | x | x |
Reference Chart
| Model | Program | Application | Staging | Power | Terminations | |||||
| Electric | Gas | Oil | Heat Pump | Millivolt | Heat | Cool | ||||
| 9801i2 | 7 DayPLUS** | x | x | x | x | - | 1 | 1 | 24V AC | E/W1, Y1, C, R, G, H, D, O, B, L, IS, OS |
| RS5110* View page |
5-2 Day | x | x | x | x | x | 1 | 1 | 24V AC or battery operated | RH/R, RC, C, G, B, O, Y1, W1 |
| RS5220 view page |
5-2 Day | x | x | x | x | - | 2 | 2 | 24V AC or battery operated | RH/R, RC, C, G, B, O, Y1, W1, Y2, W2, E, L |
| Model | Functions & Features | |||||||||||||
| Auto Changeover | Memory Reserve | Adjustable Differential | Energy Efficient Recovery | Back Lighting | Remote Sensor | Indoor Sensor | Outdoor Sensor | Programmable Fan | Energy Star | Keypad Lockout | Filter Monitor | Vacation Hold | Special Features | |
| 9801i2 | x | EEPROM | x | selectable | x | 1 indoor/1 outdoor | 9020i | 9025i | x | x | x | x | x | Humidification Dehumidification |
| RS5110* View page |
x | EEPROM | x | - | x | - | - | - | x | x | x | x | x | - |
| RS5220 view page |
x | EEPROM | x | x | x | - | - | - | x | x | x | x | x | - |
| PART # | DESCRIPTION | DIMENSIONS | WEIGHT | PRICE |
| RS-9801i2 | Robertshaw® 9801i2 5/2 Deluxe Humidity and Temperature Programmable Thermostat | 6.75"W x 4.372"H x 1.625"D | 0.6 lb |
MANUALS & USER GUIDES -
Additional Information from EPA -
- A Guide to Energy-Efficient
Heating and Cooling - English (PDF)

- Guia para la Eficiencia de Energia en la Calefaccion y el Aire Acondicionado - Spanish (PDF)

- General Home Improvement Advice
RELATED LINKS -
Environmental Protection Agency (EPA) ![]()
U.S. Department of Energy (DOE) 
RELATED ARTICLES -
- Why Use a Programmable Thermostat?
- Which is the Best Programmable Thermostat for My Needs?
- Guidelines for Using Your Programmable Thermostat
- Installing Your ENERGY STAR
- Energy Conservation Made Easy
- The History of Energy Star





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