No C Wire Options
Compare no-C-wire smart thermostats by power method: included adapters and extenders, battery power, and the line-voltage systems to rule out.
PRO1 IAQ T855iSH 8" Backlit WiFi Thermostat: Large 8" Backlit Display
If you are interested in more details, you can find full information on the seller's page.
Shipping options
Delivery to 
Russia
Russia
Available
Product details
Features
- WiFi-Enabled with Programmable Options
- Advanced HVAC Compatibility
- Precision Control & Security Features
- Reliable & Easy Installation
- Large 8" Backlit Display
This WiFi thermostat gives you precise control over your home's comfort, perfect for homeowners who want to manage energy use without sacrificing convenience. The large 8-inch backlit display and glow-in-the-dark button make it easy to read and adjust, even in a dark hallway at night.
Instead of just programming a schedule, use the auto changeover to let the thermostat switch between heating and cooling as needed. You can set temperature limits and enable keypad lockout to prevent tampering, which is great for rental properties or homes with curious kids. The filter alert reminds you to replace the filter, helping your HVAC system run efficiently.
Compatible with 2H/2C conventional and 5H/3C heat pump systems, this thermostat handles most residential setups. Installation is straightforward with color-coded terminals and a universal sub-base, so you can replace your old thermostat in under an hour.
Manage your thermostat remotely via the app, and pair it with Amazon Alexa or Google Assistant for voice control. You can adjust the temperature from bed, check the forecast, or set a schedule without leaving the couch.
General specs
- Brand: PRO1 IAQ
- Model: T855iSH
- Seller: Retailer
- ID: B0DYL7VR8Z
- WiFi: Yes
- Mounting: Junction Box
- Backlight: Blue
- Fan Control: Yes
- Glow Button: Yes
- Keypad Lock: Yes
- Display Size: 8 inches
- Power Supply: 24V
- Programmable: 7-Day, Non-Programmable
- Filter Alerts: Yes
- Auto Changeover: Yes
- Setpoint Limits: Yes
- HVAC Compatibility: 2H/2C Conventional, 5H/3C Heat Pump
- Universal Sub-Base: Yes
- Color-Coded Terminals: Yes
- Room Temp Calibration: Yes
- First listed by seller: May 28, 2026
Price History for seller Retailer
| Date | Price |
|---|---|
| 5/29/26 | RUB 13,064.24 |
| 5/28/26 | RUB 13,064.24 |
Similar products comparison
| This item | Recommendations | |||||
|---|---|---|---|---|---|---|
PRO1 IAQ T855iSH Large 8" Backlit Display
|
Venstar T7850 Built-in WiFi for remote control
|
Honeywell TH6320WF2003/U 3 Heat / 2 Cool Heat Pump
|
Honeywell TH8321WF1001/U Remote comfort control from anywhere
|
vine TJ-225B White Programmable 7-day/8 period scheduling
|
Braeburn 7205 White Programmable scheduling
|
|
| Brand | PRO1 IAQ | Venstar | Honeywell | Honeywell | vine | Braeburn |
| Model | T855iSH | T7850 | TH6320WF2003/U | TH8321WF1001/U | TJ-225B | 7205 |
| Rating |
|
|
|
|
|
|
| Price | RUB 12,678.27 | RUB 19,747.62 | RUB 10,431.49 | RUB 14,517.43 | RUB 4,252.04 | RUB 5,375.43 |
| Seller | Retailer | Retailer | Retailer | Retailer | Retailer | Retailer |
| Update | Jun 24, 2026 | Jun 24, 2026 | Jun 24, 2026 | Jun 24, 2026 | May 29, 2026 | Jun 24, 2026 |
PRO1 IAQ T855iSH Large 8" Backlit Display
RUB 12,678.27
When this device makes sense
Product confidence
Reviews
There are no text reviews yet. If you have experience using this product, please leave a review. It will help other people decide whether this product is right for them.