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Condensation on a window pane
Keystone Air Conditioning

Ventilation, condensation and mould

Extractor fans for bathrooms and kitchens, loft units for condensation, and single-room heat-recovery units.

What to send first

  • Which rooms steam up or show mould
  • Whether there is a fan there now

Steamed-up bathrooms, streaming windows and black mould in the corners are usually air that cannot get out. The fix starts where the wet air does: a stronger, quieter extractor fan in the bathroom or kitchen moves it out.

In the loft, a fan unit pushes fresh, filtered air gently through the house and drives the damp air out. That suits homes with condensation on every window in winter. For one room, a heat-recovery unit swaps stale air for fresh and keeps most of the warmth in.

This is ventilation. It is not damp-proofing, and nobody honest promises that a fan alone ends mould. Ventilation work starts in early 2027.

Values

The quote is what you pay

If your house matches your photos, the amount on your quote is what you pay. If something is different, you are told before any drilling, and you can say no and owe nothing.

You know who is coming

One name on every job, from the first photo to the last screw. No salesman and no stranger at the door.

Your house left clean

Dust sheets down, holes drilled with dust extraction, pipes in neat trunking, everything hoovered and every bit of rubbish taken away.

Frequently Asked Questions

Do you need to visit before you quote?
No. Four photos from your phone are enough for a standard job: the room, the outside wall, the route between them and the fuse board. One fixed amount comes back in writing. If the house turns out different from the photos, you are told before any drilling and can say no.
When can the work be done?
Keystone is new. Fitting starts in spring 2027 and the diary is open now, so you can send your photos today and pick a date before the first hot week. Ventilation work starts in early 2027.
Which areas do you cover?
Keystone is based in Hornchurch and works across Redbridge, East London and Essex.
Can it heat as well as cool?
Yes. Modern air conditioning is a heat pump: the same unit cools the room in a heatwave and warms it in winter.

Contact

Details that help

  • Which rooms steam up or show mould
  • Whether there is a fan there now

Add up to 5 photos of the job.