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Slimline 150

High Efficiency, Low Profile Heat Recovery MVHR Unit

The Slimline 150 is a high-efficiency, low profile MVHR unit to deliver exceptionally low energy consumption, low noise levels and innovative features. It is the ideal heat recovery unit for high ceilings.

The Slimline 150 product is Passivhaus certified and manufactured with the latest energy-saving technology.

Key Features

  • Energy Efficient
    Energy Efficient

    Delivering up to 92% thermal efficiency.

  • Mechanical Summer By-Pass
    Mechanical Summer By-Pass

    Benefiting from a temperature controlled integral mechanical summer by-pass as standard.

  • Wireless

    Available with wireless remote control.

  • Passivhaus Certified
    Passivhaus Certified

    The Passivhaus concept is the only internationally recognised, performance-based energy standard in construction

  • EC Motor
    EC Motor

    Incorporates a powerful backward curved EC motor.

  • Frost Protection
    Frost Protection

    An intelligent frost protection system prevents the heat exchange from freezing when cold outside.

  • 2 Year Warranty
    2 Year Warranty

    High quality products for peace of mind, saving time, money and hassle.


Perfect For Restricted Space

The high-efficiency EnviroVent Slimline 150 is ideal for ceiling mounted applications such as care homes and student accommodation to provide optimum ventilation. It can also be wall mounted using the supplied brackets. With a height of just 200mm, the low profile and compact design is perfect for installations where space is restricted.

For renovation projects, the Slimline 150 offers an excellent choice for smaller dwellings and can be installed in areas such as above suspended ceilings in the central hallway of an apartment.

The Slimline 150 achieves a maximum airflow rate of 150 m3/h. There is a ‘Plus’ version available featuring additional connection options such as a CO2 sensor.

Passivhaus Certified

The Slimline 150 is Passivhaus certified and manufactured with the latest energy-saving technology.

The Passivhaus concept is the only internationally recognised, performance based energy standard in construction.

Constant Flow Control

The ‘constant flow’ technology ensures maximum efficiency and that the commissioned airflow rate is always delivered despite any resistance encountered in the ductwork or filters. The ‘constant flow control’ system also enables commissioning to be carried out much quicker and more easily, saving on installation costs.

Silent and Low Energy

There are a number of factors why the Slimline Range is so quiet. Engineered with aerodynamic fans to run at lower rates enables noise to be reduced and minimalized. In addition, the unit has been designed with a larger heat exchanger, which minimises resistance to deliver exceptionally quiet running.

Control Options

The Slimline 150 comes as standard with a control module that can be used to adjust the basic settings and air flow rates. The built-in timer function can be used to set the ventilation rate per day/week/weekend. Additionally, one or more 4-way switches, wireless RF controls or a humidity sensor may be installed.

Frost Protection

An intelligent frost protection system based on temperature and pressure prevents the heat exchanger from freezing when it is very cold outside. The Slimline 150 unit combines this with an integral pre-heater.

Standard Bypass

The appliances come as standard with a 100% bypass for use when it is warm outside and heat recovery is not desired. The bypass is controlled fully automatically on the basis of the measured indoor and outdoor temperatures.

Product Codes
Product Code
Product Name
Product Description
Slimline 150
Standard unit with intelligent control panel
Slimline 150 PLUS
PLUS version with intelligent control panel
Product Specification

Performance Curve

Question & Answers

How does MVHR work?

Mechanical Ventilation with Heat Recovery works to ventilate the whole property by extracting air from wet rooms (kitchen, bathroom, toilet, utility’s etc.), this extraction is passed through a central unit to recover as much heat from the air as possible before pushing moisture outside. At the same time fresh air is pulled from outside passed through the central unit to warm up incoming air and filtering it before supplying air to habitable rooms (bedrooms, Livingroom’s, dining rooms etc). These two air flows do not physically mix.

Does ducting require to be insulated?

Any ducting passing through a unheated area will require to be insulated. Ducting connecting the unit to/from atmosphere will require insulating.

How often does a MVHR need servicing?

Any MVHR unit will need the filters checking at least every 6 months. It may be at 12-18 months they will need replacing. This time scale will depend largely on the environment and speed of the unit. Ideally at a 5-year period the system should be checked to confirm operation is to standard.

MVHR is noisy, running fast:

This can be dependent on what MVHR unit you have. To ensure minimal noise units must be installed as per the design using proprietary components. Systems must also be commissioned and set up correctly to ensure performance. Some units may have humidity sensors that automatically increase air flow speed to control humidity levels, therefore at times of high humidity the system will be working harder. Some units may also automatically increase in speed as filters become clogged up.

Can I turn the unit off?

It is not recommended to turn the unit off, other than for maintenance. Turning the unit off can damage the unit and invalidate its warranty. Also, by turning the unit off and stopping air movement in a property can lead to other issues, condensation, mould, smells, etc...
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