Slimline 300 | Mechanical Ventilation Heat Recovery Unit

Slimline 300

High Efficiency, Low Profile Heat Recovery Unit

Slimline 300

The Slimline 300 is a high-efficiency, low profile MVHR heat recovery unit delivering exceptionally low energy consumption, low noise levels and innovative features.

Features & Benefits

  • Constant flow technology to deliver the required airflow at all times
  • Exceptionally low noise levels
  • Compact and low profile design for ease of installation in restricted spaces
  • 100% summer bypass as standard
  • Intelligent frost protection
  • Ideal for a wide range of domestic and commercial applications
  • High thermal efficiency
  • Intelligent control module as standard

About the Slimline 300

The high-efficiency EnviroVent Slimline 300 mechanical ventilation heat recovery unit is ideal for ceiling mounted applications such as care homes, offices and student accommodation to provide optimum ventilation. It can also be wall mounted using the supplied brackets.

With a height of just 310mm, the low profile and compact design is perfect for installations where space is restricted. The Slimline 300 unit has a maximum airflow rate of 300 m3/h
and a high thermal efficiency heat exchanger up to 92% to improve indoor air quality and deliver optimum comfort. A ‘Plus’ version is also available featuring additional connection options such as a CO2 sensor.

What is Heat Recovery?

As building efficiency is improved with wall and loft insulation, draught proofing and double glazing, buildings are becoming more air tight and are consequently less well ventilated. Good ventilation is vital to our health and the fabric of our homes. Opening windows is one option, however this is not ideal due to security risks, loss of heat and energy in colder months.

To solve these problems, heat recovery ventilation can provide fresh filtered air, energy efficiency and a comfortable all year round climate for your property. Stale, moist air is extracted out of the wet rooms of a property. These include the kitchen, bathrooms, utility and en-suite rooms. This moist air is then ducted to a central unit.

This extracted air passes over a heat exchanger before being ducted to outside. Simultaneously, fresh air is drawn into the unit from outside, and is warmed by the high efficiency heat exchange cell. This tempered, fresh air is then delivered through supply vents into the living, dining and bedroom areas.

This constant supply of clean, tempered air into the property creates a healthy and ideal environment, maintaining stable humidity levels, free from condensation and mould. Sufferers of asthma, house dust mite populations and other respiratory problems should find this method of ventilation significantly beneficial.

Passive House Certified

The Slimline Range of products are Passive House certified and manufactured with the latest energy-saving technology. The Passive House 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 aerodynamically-designed 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.


Frost Protection

An intelligent frost protection system based on temperature and pressure prevents the heat exchanger from freezing when it is very cold outside. An external preheater is available for the Slimline 300 unit.

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.

Slimline 150 Control Module

Control Options

The Slimline Range 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.

Product Codes
SL300 Slimline 300 Standard
SL300P* Slimline 300 Plus

*The Plus versions have additional connections for CO2 sensor, geo-heat exchanger, bedroom diffuser and postheater.

SWHBKRFSET-4 4 way remote control switch and receiver
SWHBKRFSET-2 2 way remote control switch and receiver
SWHBKRF-4 4 way remote control switch
SWHBKRF-2 2 way remote control switch
SWHBK-4W 4 way wired switch with filter indication
SENSORBK-H Humidity sensor, duct mounted
SENSORBK-CO2 CO2 sensor (PLUS version only)
FILTER-ES3/400-G4 2 x G4 filters
FILTER ES3/400-G4/F6 2 x G4/F7 filters

Slimline 300 Dimensions

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  • Free Expert Advice
  • Relative Humidity Check
  • Product Demonstration

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Watch our video on how MVHR works
What is heat recovery ventilation?