Manrose Lo-Watt Positive Input Ventilation Unit

Product Code MANPIV


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exc VAT

£303.15 : inc VAT


inc VAT

£252.63 : exc VAT

  • QTY Unit Price
  • 1-2 £252.63 £303.15
  • 3+ £252.11 £302.53



The Manrose Lo-Watt PIV unit is a low-profile, easy-to-install solution that helps to prevent condensation and mould. It works by drawing in fresh air and gently feeding it into the dwelling via a ceiling-mounted diffuser. This helps to dilute, displace and replace contaminated and moisture-laden air, creating a healthier and more comfortable living environment.

The Lo-Watt Manrose PIV is uniquely flexible in its installation methods, making it easy to install in any sized loft. It comes with a hanging kit as standard and an optional floor-mounted base is available separately. The lightweight unit comes supplied with a discreet ceiling diffuser designed to be installed over the stairwell, main hall or landing.

Simple to set up and use, the unit benefits from a simple control interface that allows users to adjust the speed and mode of operation. The control panel can also be locked to prevent tampering. The ventilation system features a Radon Mode which sufficiently ventilates properties with high levels of Radon gas. The supplied G4 filters help to eliminate pollutants such as dust and pollen making it an ideal solution for allergy sufferers.

A specially designed, energy efficient Lo-Watt DC motor enables the fan to run extremely quietly whilst keeping running costs incredibly low. The unit benefits from a temperature sensor which enables it to automatically adjust the air volume when required. The sensor is adjustable, allowing users to change the temperature at which the unit increases or decreases airflow.

Backed by a 5-year warranty, this positive input ventilation system is the perfect solution for improving indoor air quality in the home.

Key Features of Manrose Lo-Watt PIV Unit

  • Energy Efficient Positive Input Ventilation System for a Healthier Living Environment
  • Helps to Prevent Condensation and Mould as well as Filtering Dust and Pollen
  • Fully Adjustable Air Flow Between 11 l/s & 60 l/s
  • Energy Efficient Motor for Low Running Costs
  • Low Running Sound Level
  • Adjustable Temperature Sensor For Automatic Air Volume Adjustment
  • Lightweight, Easy to Install
  • Radon Mode for Increased Ventilation for Properties Affected by Increased Levels of Radon Gas
  • Supplied with Discreet Ceiling Diffuser, Ceiling Hanging Kit for Loft Installation, Flexible Ducting and G4 Filters
  • IPX2 Rated
  • Made Using Recycled Material
  • Up to 5-Year Maintenance Free Filter


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If you need some help, would like to take advantage of our Price Promise or perhaps have a large order to place give our team of professionals a call on 0203 994 5470, drop us an email at or use our Contact Form.

Product Downloads Manrose Lo-Watt PIV Unit Data Sheet
Fan Type Positive Input Ventilation Unit
Brand Manrose
Range Lo-Watt PIV
Application Domestic
Product Type PIV Unit
Mounting Loft - Ceiling (Floor Cradle Available Separatly)
Airflow Rate Adjustable 11L/s to 60L/s
Fixings Included Yes
Duct Included Yes - 2M Flexible Ducting
Filters Included Yes G4 Filters
Diffuser Included Yes
Diffuser Size 200Ømm
IP Rating IPX2
Wattage 3.8W - 14W
Height 365mm
Width 446mm
Depth 309mm

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