# Room thermostat TECH ST-281 with RS communication, 2 mm glass front, black

**URL:** https://aio.lv/en/product--tech-tsst281bk--11959861
**Data updated:** 2026-03-11 13:59 (EET)
**Category:** Control Systems
**Manufacturer:** TECH
**Manufacturer code:** TSST281BK
**EAN:** 5902479662039
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 303.99 €
**Prices and availability valid until:** 2026-07-13 23:59
**Price without VAT (21%):** 251.23 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tech-tsst281bk--11959861

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

TECH ST-281 is a room thermostat designed for temperature control with RS communication interface. It features a 2 mm glass front and a black finish. The unit provides thermostat functionality for HVAC systems, enabling setpoint management and integration with controllers via RS communication. Suitable for residential and light commercial heating/cooling applications.

## Long description

TECH ST-281 is a room thermostat designed to control indoor temperature for residential and light commercial heating and cooling systems. The device features a slim 2 mm glass front in black and provides setpoint management together with an RS communication interface for integration with external controllers and building automation systems. The thermostat delivers basic temperature regulation functions while enabling remote monitoring and configuration through its serial communication link.
Advantages
The thermostat combines a tempered glass front with a compact profile that fits standard wall mounting. RS communication allows reliable data exchange with controllers and building management systems, supporting centralized monitoring and adjustment. The black finish offers a discreet visual appearance suitable for modern interiors, and the control logic is tailored for straightforward temperature setpoint changes and stable regulation of HVAC equipment.
Suitable for
 Residential central heating and cooling control
 Small offices and light commercial spaces requiring room temperature management
 Integration with controllers and building automation via RS communication
 Applications where a low-profile, glass-front thermostat is preferred
Key specifications
 Front material: 2 mm tempered glass
 Color: black
 Interface: RS communication port for serial integration
 Function: room temperature setpoint control and regulation for HVAC systems
 Mounting: wall-mounted unit compatible with standard electrical boxes
How to use
Install the thermostat on a suitable interior wall at typical head height, away from direct sunlight, drafts and heat sources for accurate temperature sensing. Connect power and communication lines according to the system wiring diagram and configure the RS communication parameters to match the host controller. Set the desired temperature setpoint using the front controls and verify correct operation of connected heating or cooling equipment. For integration, ensure addressing and protocol settings on both the thermostat and the controller are aligned before commissioning.
Usage recommendations
Place the thermostat in a representative location for the area to be controlled and avoid mounting near windows, doors, or ventilation outlets. When integrating via RS communication, use shielded cabling and follow grounding best practices to reduce interference. Perform a brief functional test after installation to confirm setpoint response and communication with the building controller.

## FAQ

### How much does the TECH ST-281 room thermostat cost, and is it available for purchase?

The price is 303.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 06.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can TECH ST-281 room thermostat be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All TECH products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized TECH service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11959861/67405272_large.webp