Vaillant WH95 Low Loss Header | 306721 | 2in BSP 8000 L/hr

Description

The Vaillant WH95 Low Loss Header is a freestanding hydraulic separator designed to maintain stable water flow through compatible Vaillant ecoTEC boilers while supplying multiple heating circuits with a consistent flow temperature. With 2 inch BSP female connections, a flow rate of up to 8,000 litres per hour and a low pressure drop of 7.4 mbar, it is a practical choice for larger domestic and light commercial heating installations.

By hydraulically separating the boiler circuit from the heating circuits, the WH95 helps prevent unwanted interaction between circulation pumps. This supports dependable operation in systems where underfloor heating and radiator circuits have different temperature and flow rate requirements.

Flow Rate

8,000 L/hr

Connection

2in BSP (F)

Pressure Drop

7.4 mbar

Output at 20K

190 kW

Output at 11K

102 kW

MPN

306721

Important installation note: The Vaillant WH95 is suitable only for new, clean heating systems with correctly inhibited water. It must be installed by a competent heating engineer in accordance with the manufacturer’s installation instructions and applicable UK regulations.

Compatibility: This low loss header is intended for use with compatible Vaillant ecoTEC plus 48 kW and 64 kW boilers. Always confirm the hydraulic design, system output and header selection against the boiler manufacturer’s current installation documentation before ordering.

Installer tip: Vaillant recommends fitting a suitable dirt filter in the return flow between the low loss header and the heating circuits to help prevent system debris from entering the boiler.

Key Features

Hydraulic Separation

Helps isolate the boiler circuit from heating circuit pumps, reducing the risk of feed head interaction and supporting stable system performance.

High Flow Capacity

Handles flow rates up to 8 m³/hr, making it suitable for larger heating systems with multiple circuits.

Consistent Flow Temperature

Supports a steady supply temperature to downstream circuits, including systems combining radiators and underfloor heating.

Low Pressure Loss

A pressure drop of just 7.4 mbar helps minimise unnecessary resistance within the hydraulic system.

Freestanding Design

The freestanding format provides a practical solution for plant rooms and commercial style heating installations.

Genuine Vaillant Component

Manufactured by Vaillant under MPN 306721, providing a purpose designed solution for compatible Vaillant heating systems.

Technical Specifications

General

Brand

Vaillant

Product Type

Low loss header

Model

WH95

MPN

306721

EAN

4024074412909

Installation Type

Freestanding

Hydraulic Performance

Maximum Flow Rate

8 m³/hr / 8,000 litres per hour

Pressure Drop

7.4 mbar

Output at 20K Temperature Spread

190 kW

Output at 11K Temperature Spread

102 kW

Connections & Dimensions

Connections

2 inch BSP female

Height

750 mm

Width

155 mm

Depth

155 mm

Compatibility & System Requirements

Compatible Boilers

Vaillant ecoTEC plus 48 kW and 64 kW boilers

Suitable Systems

New, clean heating systems with correctly inhibited water

Recommended Accessory

Suitable dirt filter in the return flow between the header and heating circuits

Frequently Asked Questions

What does a low loss header do?

A low loss header hydraulically separates the boiler from the heating circuits. It helps maintain the correct flow through the boiler while allowing different circuits, such as radiators and underfloor heating, to operate at their required flow rates and temperatures.

Which boilers is the Vaillant WH95 suitable for?

The WH95 is designed for use with compatible Vaillant ecoTEC plus 48 kW and 64 kW boilers. The final header selection should always be checked against the boiler manufacturer’s installation instructions and the designed system load.

Can it be used with underfloor heating and radiators?

Yes. The Vaillant WH95 is suitable for systems with different temperature and flow rate requirements, including installations that combine underfloor heating and radiator circuits.

What size are the connections?

The WH95 has 2 inch BSP female connections, allowing integration into appropriately sized heating pipework.

Does it require a dirt filter?

Vaillant recommends fitting a suitable dirt filter in the return flow between the low loss header and the heating circuits. This helps protect the boiler from system debris and supports long term reliability.

Is professional installation required?

Yes. This product should be installed by a competent heating engineer in line with the manufacturer’s instructions and relevant UK heating and water treatment requirements. It is intended for new, clean systems using correctly inhibited water.

BTU Calculator

BTU & WATT Calculator

Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

Calculate

Required Heating

0

Watts

0

BTUs