# Thermostatic Radiator Valve Set Honeywell Thera4 with Thermostatic Head and Return Valve VTL320EA15

**URL:** https://aio.lv/en/product--honeywell-vtl320ea15--11700054
**Data updated:** 2026-03-08 08:46 (EET)
**Category:** Heating Radiators
**Manufacturer:** Honeywell
**Manufacturer code:** VTL320EA15
**EAN:** 4029289055118
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 25.99 €
**Prices and availability valid until:** 2026-07-26 23:59
**Price without VAT (21%):** 21.48 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--honeywell-vtl320ea15--11700054

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Thermostatic radiator valve set Honeywell Thera4 (VTL320EA15) includes a thermostatic head, a radiator valve and a return (lockshield) valve. Designed for manual temperature regulation on hot-water radiators, it controls flow to maintain set room temperature and enables balancing of the heating system. Suitable for residential and light commercial radiator installations where thermostatic control and return flow adjustment are required.

## Long description

The Honeywell Thera4 thermostatic radiator valve set comprises a thermostatic head, a radiator valve and a return (lockshield) valve designed for manual temperature control on hot-water radiators. The set allows room-temperature regulation by modulating flow through the radiator with the thermostatic head while the return valve provides balancing capability for the heating circuit. Intended for residential and light commercial radiator installations, this valve set offers simple installation and precise hydraulic balancing to maintain comfortable indoor temperatures and improve system efficiency.
Advantages
The thermostatic head provides automatic modulation of radiator flow to hold the chosen room temperature, reducing overheating and unnecessary energy use. The included return (lockshield) valve enables accurate balancing of the radiator circuit, ensuring even heat distribution across multiple radiators. The components are compatible with standard radiator connections and built to work with conventional hot-water central heating systems, simplifying replacement or retrofit tasks.
Suitable for
 Residential hot-water radiators requiring room-temperature control
 Light commercial radiator installations such as small offices or retail spaces
 Retrofitting existing radiators to add thermostatic control
 Balancing multi-radiator heating circuits for improved heat distribution
Key specifications
 Set contents: thermostatic head, radiator valve, return (lockshield) valve
 Function: thermostatic flow control with separate return flow adjustment
 Compatibility: designed for conventional hot-water radiator systems
 Control type: manual setpoint on thermostatic head for automatic regulation
 Installation: valve set for direct mounting on radiators with standard connections
How to use
Fit the radiator valve to the supply pipe and the return (lockshield) valve to the radiator outlet following the radiator manufacturer’s instructions and standard plumbing practice. Mount the thermostatic head on the radiator valve spindle and set the desired room temperature using the head’s scale. The thermostatic element will automatically adjust the valve opening to maintain the set temperature by modulating hot-water flow. Use the return valve to balance flow across the circuit by partially closing or opening it until required radiator temperature distribution is achieved.
Usage recommendations
Locate the thermostatic head where it can sense ambient room temperature accurately — avoid installation directly behind curtains, furniture, or close to heat sources. During initial commissioning, balance the heating circuit by adjusting the return valve settings while the system is at normal operating temperature. Regularly check for free movement of the thermostatic head and ensure valves are free from debris; follow routine boiler and heating system maintenance schedules for reliable operation.

## FAQ

### How much does the Honeywell Thera4 Thermostatic Radiator Valve VTL320EA15 cost, and is it available for purchase?

The price is 25.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 175 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 14.07.2026 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. All transactions are 100% secure and encrypted.

### 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 Honeywell 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 Honeywell 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

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