# Heat meter Santech QHeat5 QH51-000-00-0 qp 1.5 m³/h DN15 return

**URL:** https://aio.lv/en/product--santech-d8qh51-000-00-0--11154041
**Data updated:** 2026-03-12 16:28 (EET)
**Category:** Sensors & Detectors
**Manufacturer:** Santech
**Manufacturer code:** D8QH51-000-00-0
**EAN:** 5902730507819
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Santech QHeat5 QH51-000-00-0 is a heat meter designed for return (return line) measurement with a nominal flow qp of 1.5 m³/h and pipe connection DN15. It records thermal energy consumption by combining flow measurement and temperature differential sensing. Suitable for residential and light-commercial heating systems where compact DN15 mounting and mid-range flow capacity are required.

## Long description

Santech QHeat5 QH51-000-00-0 qp 1.5 m³/h DN15 return is a heat meter engineered for return-line measurement in heating systems. It combines a volumetric flow sensor with temperature-difference sensing to calculate thermal energy consumption. The device is designed for compact DN15 installation and supports a nominal flow rate of 1.5 m³/h, making it suitable for residential and light-commercial heating circuits that require return-side metering and mid-range flow capacity.
Advantages
The meter provides integrated flow and temperature measurement for accurate energy calculation while occupying minimal space thanks to its DN15 form factor. Designed for return-line installation, it enables direct measurement of returning heating medium and reduces potential installation complexity where return-side access is preferred. Its mid-range nominal flow supports a range of common household and small business heating loads, and the construction materials and sensor placement are intended to deliver stable readings over typical operating conditions.
Suitable for
Residential central heating systems with return-line metering
Small apartment buildings and multi-dwelling units with DN15 piping
Light-commercial premises with moderate heat demand
Replacement or retrofit projects that require compact DN15 meters
Key specifications
Nominal flow (qp): 1.5 m³/h
Connection size: DN15
Measurement type: return-line heat metering (flow + temperature differential)
Application: residential and light-commercial heating systems
Physical form factor: compact inline meter for DN15 piping
How to use
Install the heat meter in the return pipe of the heating circuit in the orientation recommended by the manufacturer, ensuring proper sealing and alignment with DN15 fittings. Connect temperature sensors and flow connections according to system wiring and hydraulic diagrams, taking care to maintain correct thermal contact and avoid air pockets in the sensor region. After mechanical and electrical installation, configure the meter parameters following technical documentation, verify measured flow and temperature readings, and perform commissioning to confirm accurate energy calculation across expected operating ranges.
Usage recommendations
Ensure regular inspection for leaks, clean sensor surfaces if accessible, and follow scheduled verification procedures to maintain measurement accuracy. When replacing an existing meter, confirm compatibility with existing DN15 fittings and controller interfaces to minimise downtime.

## FAQ

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. 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 Santech 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 Santech 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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