Servicing All 32 London Boroughs, Hertfordshire & Bedfordshire NAPIT Registered #67518 0% VAT on Solar & Battery (Until March 2027)
NAPIT Registered Contractor #67518

Part F Compliant Ventilation

Specialist installation of continuous Decentralised Mechanical Extract Ventilation (dMEV). Eradicate damp, condensation, and mould with UKAS-calibrated, Part F compliant extraction systems for bathrooms and kitchens.

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NAPIT #67518
Part P Approved Contractor
SAFETY & LEGAL COMPLIANCE

Why NAPIT Accreditation Protects You

  • Building Regulations Sign-Off: We self-certify our electrical work directly to your local council building control, saving you hundreds in inspector fees.
  • Annual Technical Vetting: Our equipment calibration, test instruments, and on-site installations undergo rigorous annual inspection.
  • Workmanship Guarantee: Backed by NAPIT's consumer protection guarantee and £5,000,000 public liability insurance.
TRANSPARENT SERVICES

Ventilation Services We Deliver

All ventilation installations are fully compliant with Building Regulations Part F and include digital UKAS-calibrated airflow testing and certification.

Bathroom dMEV Installation

Continuous, whisper-quiet extraction systems designed to permanently eliminate bathroom condensation, steamed mirrors, and black mould.

Free Visual Survey & Written Estimate

Kitchen Extract Ventilation

High-capacity dMEV systems for kitchens, precisely calibrated to meet the 13 l/s continuous extraction requirement under building codes.

13 l/s Continuous Kitchen Extraction Rate

Diamond Core Drilling

Dust-free diamond core drilling for new ventilation ducts through solid brick and cavity walls, ensuring perfectly sealed, airtight thermal boundaries.

Detailed Fixed-Price Specification

UKAS Airflow Commissioning

We don't just guess. Every fan is digitally commissioned using a UKAS-calibrated vane anemometer to guarantee it moves the legal volume of air.

Fixed-Fee Landlord & Domestic Reports

Mould & Condensation Diagnostics

Expert assessment of cold spots, thermal bridging, and relative humidity issues in landlord properties to prescribe the exact ventilation required.

Relative Humidity & Thermal Diagnostics

Landlord Part F Compliance

Protect your property investment and your tenants' health with legally certified ventilation upgrades that permanently cure damp disputes.

Guaranteed Damp & Condensation Remedy
VENTILATION HARDWARE

dMEV Ventilation Systems We Install

We strictly install premium, continuous-running dMEV fans that operate almost silently (<10dB) while costing less than £2 a year in electricity to run.

Continuous Whisper Trickle Technology

Silent Tornado dMEV

The ultimate in continuous extraction. The Silent Tornado operates at a virtually inaudible 10dB on trickle mode. It features an integrated digital display for precise commissioning and ultra-low energy DC motors.

  • Whisper Quiet: Operates at an astonishingly low 10dB on trickle speed, meaning it can run 24/7 without disturbing sleep.
  • Low-Energy DC Motor: Ultra-efficient motor consumes under £2 per year in continuous electrical running costs.
  • Digital Commissioning: On-board digital LCD display for exact flow rate calibration to Part F standards.
Installed Upgrade Price
Bespoke Specification (Fully Certified)
5-Year Manufacturer Warranty
Silent Tornado continuous dMEV extract unit
Social & Private Rental Standard
UKAS Commissioned • 9.65 l/s Part F

Greenwood Airvac Unity CV2GIP

Award-winning continuous extract fan engineered for social housing and private rental compliance. Features SMART humidity sensing that automatically responds to moisture spikes without nuisance triggering.

  • SMART Humidity Sensing: Automatically ramps to boost speed during showers and bathing, returning to whisper trickle once clear.
  • 100% Part F Compliant: Satisfies all continuous domestic ventilation rates required by Building Regulations.
  • Low Wattage Technology: Consumes as little as 1.1W on trickle, eliminating damp while keeping tenant bills low.
Installed Upgrade Price
Bespoke Specification (Fully Certified)
5-Year Greenwood Guarantee
Greenwood Airvac continuous dMEV airflow testing 9.65 l/s
Intelligent Air Quality Control
Verified Install • Richmond SW14

Vent-Axia Lo-Carbon Response 7 & PureAir

Pioneering continuous bathroom extraction with real-time digital LED display, automated humidity tracking, and ultra-low energy SELV motors. Clean aesthetic magnetic front cover with sealed air barrier.

  • Digital LED Display: Built-in digital flow indicator and commissioning interface ensuring exact Part F Building Regs sign-off.
  • Safe Extra Low Voltage (SELV): 12V DC SELV rating allows safe installation directly inside bathroom splash zones (Zones 1 & 2).
  • Ultra-Quiet & Low Wattage: Whisper-quiet operation consuming under 1.5W on continuous trickle to eliminate condensation and mould 24/7.
Installed Upgrade Price
Bespoke Specification (Fully Certified)
7-Year Vent-Axia Warranty
Vent-Axia Lo-Carbon continuous dMEV extract fan
REAL PROCESS WALKTHROUGHS

Ventilation Case Studies: The Complete Installation Process

From dust-free diamond core drilling and internal duct sleeving to UKAS calibrated continuous airflow testing, see our Part F compliant installations documented step by step.

Ventilation & Extract Potters Bar • Hertfordshire EN6 • Utility Room Continuous dMEV Fan

High-Humidity Domestic Utility Room Continuous dMEV Ventilation with Precision Facing Brick Core Penetration

Part F Compliant • UKAS Tested
STAGE 01 Initial Survey & Route Mapping
Pre-installation survey and core route mapping at Potters Bar, Hertfordshire EN6
View Stage 1
Conducted structural pre-installation survey of the utility room wall and external cavity substrate. Mapped precision 100mm diamond core trajectory with dedicated switched fused spur electrical supply routing and zero structural clash.
STAGE 02 Diamond Core Duct & Wall Sleeve
Precision 100mm diamond core wall penetration and internal sleeve preparation at Potters Bar, Hertfordshire EN6
View Stage 2
Precision diamond core drilled 100mm circular penetration cleanly through internal plaster and masonry cavity substrate without blow-out or spalling. Prepared internal wall surface, marked chassis mounting template, and fitted low-resistance duct sleeve ready for continuous extract unit mounting.
STAGE 03 Finished Flush Enclosure Handover
Completed utility room installation with continuous flush dMEV unit at Potters Bar, Hertfordshire EN6
View Stage 3
Fitted sleek minimalist Pass Safe Eco continuous dMEV extract unit flush to the utility room wall. Connected via clean mini-trunking to dedicated switched fused spur isolator, commissioned whisper-quiet continuous trickle ventilation (<11 dB), calibrated to 8.0 l/s Part F Building Regulations with a UKAS digital vane anemometer, and issued official compliance certification.
Fan Unit Pass Safe Eco-D100 Continuous dMEV
Core Penetration 100mm Precision Diamond Core • Masonry Cavity
Testing Equipment UKAS Calibrated • Model LCA501
Continuous Extract <11 dB Whisper • 8.0 l/s Calibrated Trickle
Kitchen Ventilation Chippenham, Wiltshire SN15 • Contemporary Kitchen Retrofit

High-Efficiency Kitchen Continuous dMEV Fan with UKAS Calibrated Airflow Commissioning

13.1 l/s UKAS Verified Rate
STAGE 01 Bosch Wall Scanner Survey & Route Mapping
Bosch Professional wall scanner survey and core trajectory mapping for dMEV extract fan
View Stage 1
Conducted comprehensive structural survey and subsurface scanning using a Bosch Professional wall scanner, verifying zero hidden electrical cables or pipework before marking the 100mm diamond core aperture.
STAGE 02 Airflow Hood Calibration & Testo Anemometer
Airflow capture hood testing and digital vane anemometer calibration at 13.1 l/s on continuous dMEV extract fan
View Stage 2
Installed the continuous dMEV extract unit with sealed backdraught protection. Conducted live digital airflow commissioning using a UKAS-calibrated Testo 417 vane anemometer with airflow capture hood, precisely verifying 13.1 l/s extract rate for Part F compliance.
STAGE 03 Flush Cover Installation & Clean Handover
Completed sleek white continuous dMEV fan flush mounted on wall
View Stage 3
Fitted the sleek, low-profile acoustic front baffle cover. Verified ultra-low decibel whisper operation (<11 dB), confirmed fused spur isolation, and issued official Part F Ventilation & Minor Electrical Works certification.
Extract Rate 13.1 l/s UKAS Calibrated
Acoustics < 11 dB Whisper Continuous
Integration High-Gloss Cabinetry Alignment
Certification Part F Compliant • Minor Works
FREQUENTLY ASKED QUESTIONS

Ventilation Services FAQs

Important advice regarding continuous dMEV ventilation, building regulations Part F, and condensation prevention.

Unlike traditional intermittent extract fans that only run when the bathroom light is switched on, dMEV (Decentralised Mechanical Extract Ventilation) operates continuously at an inaudible whisper trickle (<11dB). By constantly expelling stale, humid air and pulling in fresh air 24/7, it permanently prevents condensation and black mould from ever developing.
Because modern dMEV units utilise ultra-low-energy brushless DC motors, they consume between 1.1W and 2.5W on continuous trickle speed. The total annual running electricity cost is typically less than £2 to £5 per year—drastically cheaper than redecorating or treating damp walls.
Approved Document Part F of Building Regulations requires verified minimum extraction rates (e.g. 8 l/s for utility rooms, 13 l/s for kitchens). Our engineers test and calibrate each installation using a UKAS-calibrated vane anemometer, issuing you with an official airflow test certificate for your local authority building control or landlord records.
GET YOUR FIXED QUOTE

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Speak directly to our certified electrical engineers. We visit your property, assess your roof/electrical installation, and provide an itemized proposal with zero obligation.

Operating Base
Watford, Hertfordshire & Greater London
Accreditation
NAPIT Registered Contractor #67518

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