Positive input ventilation (PIV)
Loft or wall units that gently push filtered air into the home to tackle condensation.
Greater London · England
Homes, rentals and business premises in Bexley and DA5, DA6, DA14 and DA15.
Ventilation Contractors works on houses, flats, rentals and business premises in Bexley and across Greater London. Tell us the postcode and what is going wrong, and we will tell you which fix fits before anyone books a visit.
Landlords in Bexley can book a whole-property check: fans tested, trickle vents looked at and a written list of what to fix, which is useful evidence if a tenant reports damp or mould.
For businesses in Bexley we cover office and shop ventilation, commercial kitchen extraction, duct cleaning to TR19 and planned servicing of air handling units.
Loft or wall units that gently push filtered air into the home to tackle condensation.
Bathroom, kitchen and utility fans sized to the Part F rates, ducted outside and tested.
We find why the house is wet and fix the ventilation, rather than painting over mould.
Tested fans and PIV for rental homes and HMOs, with records for your property file.
| Work | Guide price |
|---|---|
| Whole-home MVHR retrofit, 3 bedroom house (per home) | £7,750–£11,350 inc VAT |
| Condensation and mould ventilation survey with written findings (per home) | £150–£270 inc VAT |
| Continuous-running extract fan (dMEV) with humidity boost, flow tested (per fan) | £415–£725 inc VAT |
| Rental upgrade: PIV unit plus two humidity-controlled extract fans (typical 2 to 3 bed) (per property) | £1,800–£3,225 inc VAT |
Guide prices using London rates. Home prices include VAT at 20%; business prices exclude VAT. A guide price is not a quote: we confirm a fixed price in writing first.
In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Our team is based in Great Barr, Birmingham, about 116 miles away. Every visit is booked by appointment and confirmed in writing.
It depends on the job. As a guide, kitchen canopy and extract system for a café or takeaway (canopy up to 2 m) is typically £7,150 to £14,350 + VAT per kitchen, using London rates.
Yes. We cover Bexley (DA5, DA6, DA14 and DA15) and nearby places including Sidcup, Welling, Dartford and Swanley.
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.