Continuous extract fans (dMEV) in Lincolnshire

A dMEV (decentralised mechanical extract ventilation) fan is a low-energy extract fan that runs continuously at a quiet trickle speed and boosts automatically when it senses humidity or a light switch. Because it never fully switches off, moisture is removed steadily instead of building up between showers.

Across Lincolnshire the job is priced the same way wherever you are: what is fitted, how long it takes and how far we travel. Towns we cover include Grantham, Cleethorpes, Spalding, Skegness and Lincoln.

dMEV fans in Lincolnshire at a glance

Area: Lincolnshire
Towns listed: 17, largest Lincoln
Postcode districts: NG31, NG32, DN31, DN32, PE11 and PE24
Price region: East Midlands
Survey: Free survey (UK mainland)

How we do it

Landlords and housing associations often choose them because tenants cannot switch them off and forget them. Under Approved Document F, continuous mechanical extract systems need commissioning: the airflow on both trickle and boost is measured and recorded. We do that as part of the job, so you have a record for building control, a landlord file or a future buyer.

Bathroom and en-suite

Through-wall or ceiling fans with humidity-controlled boost.

Kitchen

Higher-rated continuous fans where a ducted hood is not practical.

Whole-home dMEV upgrade

Every wet room converted at once, with trickle vents checked in the habitable rooms.

Guide prices in Lincolnshire

Continuous extract fans (dMEV) guide prices in Lincolnshire
Work	Guide price
Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan)	£340–£575 inc VAT
Airflow testing and commissioning sheet for extract fans (up to 6 fans) (per home)	£140–£290 inc VAT

East Midlands rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

Common reasons people call

An energy retrofit has made the house more airtight
Building control has asked for continuous extract
Occupants switch fans off because of noise

Rules in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

How the job runs

Survey
Specify
Fit
Commission
Record

Towns we cover in Lincolnshire

Questions about continuous extract fans (dMEV) in Lincolnshire

Which towns in Lincolnshire do you cover?

All of Lincolnshire, including Grantham, Cleethorpes, Spalding, Skegness and Lincoln. If your town is not listed, send the postcode and we will confirm.

Is it expensive to run a fan all the time?

No. dMEV fans use very little electricity on trickle speed, typically a few watts, so running costs are low compared with the condensation and mould they prevent.

Are continuous fans noisy?

A correctly sized dMEV fan is very quiet on trickle; most people only notice it on boost. Noise usually means the wrong fan or a poor duct.

Are prices different in Lincolnshire?

Our guide prices are adjusted by region. In Lincolnshire we use East Midlands rates, so continuous-running extract fan (dMEV) with humidity boost, flow tested is typically £340 to £575 inc VAT per fan.

Is the survey free in Lincolnshire?

For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.