# Herz CALIS-TS 3-way Thermostatic Mixing Valve 3/4"

**URL:** https://aio.lv/en/product--herz-1776102--12409185
**Data updated:** 2026-05-11 20:09 (EEST)
**Category:** Underfloor Heating
**Manufacturer:** Herz
**Manufacturer code:** 1776102
**EAN:** 9004174718304
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 33.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 27.68 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--herz-1776102--12409185

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 07.07.2026 | free |
| Pickup points | 10.07.2026 | 1.99 EUR |
| Courier delivery to door | 10.07.2026 | 4.99 EUR |

## Summary description

The Herz CALIS-TS is a high-quality 3-way thermostatic mixing valve designed for precise temperature control in heating and cooling systems. Featuring a 3/4" connection, this valve ensures efficient flow regulation and reliable performance. It is ideal for use in underfloor heating systems or domestic hot water circuits, providing long-term durability and consistent operation for professional HVAC installations.

## Long description

The Herz CALIS-TS 3-way thermostatic mixing valve is a professional-grade component engineered for accurate temperature regulation within heating and cooling circuits. With a 3/4" connection size, this valve is designed to integrate seamlessly into hydronic systems, ensuring optimal flow distribution and thermal stability. Its robust construction supports reliable, long-term operation in demanding HVAC environments, making it a preferred choice for maintaining consistent water temperatures in complex installations.
Advantages
This thermostatic mixing valve offers exceptional precision in temperature control, which is essential for maintaining system efficiency and protecting sensitive components from thermal stress. The high-quality materials used in its manufacture ensure resistance to wear and corrosion, contributing to a longer service life and reduced maintenance requirements. Its compact design allows for straightforward installation in tight spaces, while the reliable internal mechanism provides consistent performance even under varying pressure conditions.
Suitable for
Underfloor heating systems
Domestic hot water circuits
Heating and cooling distribution manifolds
Temperature control in hydronic installations
When it may not be suitable
This valve is not intended for use in high-pressure industrial steam systems or applications involving aggressive chemical fluids that could damage the internal seals. It is also not suitable for systems requiring rapid, automated electronic modulation without the appropriate thermostatic head or actuator compatibility.
Key specifications
Connection size: 3/4 inch
Valve type: 3-way thermostatic mixing valve
Application: Heating and cooling systems
Material: Durable brass alloy
How to use
The Herz CALIS-TS valve should be installed by a qualified professional in accordance with the system's flow requirements. Ensure that the flow direction matches the markings on the valve body to guarantee correct mixing performance. Once installed, the thermostatic head or actuator must be calibrated to the desired temperature range to achieve the intended mixing ratio. Regular inspection of the connections and the valve body is recommended to ensure there are no leaks and that the mechanism remains free of debris.
What to consider before purchase
Verify that the 3/4" connection size is compatible with your existing piping infrastructure.
Ensure the system pressure and temperature ratings align with the valve specifications.
Check if an additional thermostatic head or actuator is required for your specific control application.
Usage recommendations
For optimal performance and longevity, it is recommended to install a filter or strainer upstream of the valve to prevent sediment from interfering with the internal mixing mechanism.

## FAQ

### How much does the Herz CALIS-TS 3-way Thermostatic Valve 3/4" cost, and is it available for purchase?

The price is 33.49 € (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 07.07.2026 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 Herz 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 Herz 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/12409185/68701721_large.webp