# Primeline PEF4020 4-inch Extractor Fan with Timer

Primeline \(Manrose\): The Primeline PEF4020 extractor fan is a wall-mounted, 4-inch bathroom or toilet fan with an adjustable overrun timer. Its stated extraction rate is 85 cubic metres per hour, and the fan continues running for a preset time after the light is switched off.

- [Original product page](https://bargainpostbox.co.uk/product/primeline-pef4020-4-inch-extractor-fan-timer)
- [View offer](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Primeline \(Manrose\)
- Model: PEF42020
- Category: Home & Kitchen > Heating, Cooling & Air Quality > Fans
- Price: 22.56 GBP
- Previous price: 26.55 GBP
- Discount: 15%
- Price checked: 2026-11-14T19:26:48.633Z
- Rating: 4.4 / 5
- Reviews: 862

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Adjustable overrun timer keeps the fan running for a preset time after the light is switched off.
- The listing states an extraction rate of 23 litres per second, or 85 cubic metres per hour.
- Designed for wall mounting in a bathroom or toilet, with a 4-inch \(100mm\) exhaust.

## Pros

- The adjustable overrun timer can continue extraction after the room light is turned off.
- The stated airflow rate and 4-inch exhaust size make its intended bathroom and toilet use clear.
- Customer feedback reports that it can suit like-for-like replacement jobs and that installation may avoid drilling new holes.

## Specifications

### Identity
- Brand: Primeline \(Manrose\)
- Model: PEF42020
- Fan design: Exhaust Fan
- Colour: White With Silver Accents
### Airflow and operation
- Airflow capacity: 85 Cubic Metres Per Hour
- Extraction rate: 23 litres per second, 85 cubic metres per hour extract rate.
- Exhaust size: 4" \(100mm\) exhaust
- Timer: Adjustable Over Run Timer continues to operate fan for a pre-set time after light turned off
- Number of power levels: 1
- Number of blades: 7
### Electrical
- Power: 25 watts
- Voltage: 230 Volts
- Power configuration: Electric Cable
- Control method: Push Button
- Motor type: brushless
### Dimensions and installation
- Dimensions listed: 3D x 16.3W x 16.3H centimetres
- Product dimensions: 163mm x 163mm with 30mm projection from wall. 4" \(100mm\) exhaust
- Mounting type: Wall Mount
- Indoor/outdoor use: Indoor

## Before you buy

- The listing identifies the item as PEF4020 in its title and part number, but gives PEF42020 as the model name and model number. Its dimensions also differ in format: one entry says 3D x 16.3W x 16.3H centimetres, while another specifies 163mm x 163mm with 30mm projection. Confirm the model code and fit against the selected listing before ordering. Customer feedback is mixed on noise, with reports ranging from quieter operation to a loud rattle, and includes durability concerns.

## In the box

- Cord (Included)

## A good fit for

- Bathroom or toilet owners seeking a wall-mounted extractor with an adjustable overrun timer.
- Buyers replacing an existing fan who can confirm the model and listed dimensions suit the installation.

## Less suited to

- Buyers who need independently confirmed noise levels or long-term durability information.

## Customer feedback

Customer feedback describes the fan as performing well and serving as a like-for-like replacement, with some customers reporting installation without drilling new holes. Feedback also mentions good value, but noise experiences vary from quieter operation to a loud rattle. Durability is a concern in some reports, including breakdowns after a little over a year. For a replacement, the reported fit and installation experience may matter, while buyers sensitive to noise or prioritising long service life should weigh the mixed feedback. These reports do not establish performance or lifespan for every unit.
- Positive themes: Customers report good performance and usefulness as a like-for-like replacement.
- Positive themes: Some customers describe installation as easy and say they did not need to drill new holes.
- Positive themes: Customer feedback describes the product as good value.
- Negative themes: Some customers report a loud rattle.
- Negative themes: Durability concerns include reports of the fan breaking down after a little over a year.
- Mixed feedback: Noise feedback varies, with some customers finding it quieter and others reporting a loud rattle.

## Frequently asked questions

### Does the fan have an overrun timer?
Yes. The listing says its adjustable timer keeps the fan running for a preset time after the light is turned off.
### What airflow rate is listed?
The listing states 23 litres per second, equivalent to 85 cubic metres per hour.
### What size exhaust does it use?
The listing specifies a 4-inch \(100mm\) exhaust.
### Which model code should I check before ordering?
The title and part number say PEF4020, while the model name and model number say PEF42020. Confirm which code applies to the selected listing.

## Alternative options

- [Manrose QF100T Quiet Fan 100mm \(4"\) Bathroom Extractor Fan with Adjustable Timer, Ultra Quiet 27dB\(A\), 75 m³/h, Low Energy 5W, Backdraught Shutters, Wall or Ceiling Mount](https://bargainpostbox.co.uk/visit/manrose-qf100t-100mm-timer-extractor-fan)
- [Manrose XF100T 100mm \(4"\) Bathroom Extractor Fan with Adjustable Timer, 85 m³/h Extraction, Wall or Ceiling Mount, 98mm Spigot, Double Insulated, for Bathrooms & Toilets, White](https://bargainpostbox.co.uk/visit/manrose-xf100t-100mm-bathroom-extractor-fan-timer)
- [Primeline PEFLVF Low Voltage Extractor Fan 12V AC Made in UK by Manrose](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)
- [Primeline PEF4040 Extractor Fan with Humidistat/Timer XF100H](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)
- [VENTS Silenta 100mm Bathroom Extractor Fan with Run-On Timer \| Timed Overrun After Switch-Off, Quiet Low-Energy Operation, White Finish](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)
- [Manrose NVF100T 4" 100mm Bathroom WC Extractor Fan With Timer](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)

## Add-ons

- [TUPARKA 4 Pack Large Size Metal Hose Clips 91-114 mm Adjustable Ducting Clamps for Securing Hoses and Pipes Tube](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)
- [Kair 100mm x 3m PVC Flexible Ducting Hose \| For dryer vents and cooker hoods and extractor fans, Flexible ducting offers an easy solution for running ducting](https://bargainpostbox.co.uk/visit/primeline-pef4020-4-inch-extractor-fan-timer)

## Images

![Primeline PEF4020 4-inch Extractor Fan with Timer — 1](https://bargainpostbox.co.uk/i/-6NTge1BQ73ax6_pbb7chhatSUvC0JRdtq2JOSrsbVKTfERf7aOfMkWD_OpfUA8TMvyWwnekqtGAE4CNQ51MR7-BjVw4t8wfOUarBfHhERVQOXHf.jpg)