Start with the requirement, not a product name
Write down which rooms are involved and what has prompted the project. This might be a refurbishment, a change to the layout or concerns about existing extraction. Describe observations separately from any proposed explanation.
Condensation, for example, doesn’t establish which ventilation system should be fitted. The property’s condition and use still need consideration. A product recommendation made without that context leaves important questions unanswered.
Understand the main approaches
Natural ventilation uses openings and outdoor conditions to allow air exchange. Its suitability needs to be considered alongside how those openings can be used, including noise, security and the arrangement of rooms.
Mechanical extract ventilation, often shortened to MEV, uses fans to remove air. The design also needs to account for how replacement air enters and moves through the home. An extract-only arrangement is different from a balanced supply-and-extract system.
Mechanical ventilation with heat recovery, or MVHR, combines supply and extraction with a heat exchanger. Positive input ventilation, or PIV, introduces air into the home. These names describe different arrangements, rather than interchangeable versions of the same product.
For a proposed new system, our installation page sets out the property and project information to prepare.
Consider the practical fit
A whole-home system needs discussion of equipment location, duct routes and access for future maintenance. Those questions can be easier to address during a refurbishment than after finishes have been completed.
Ask how the proposed arrangement fits the building, what work is included and what remains to be assessed. Noise expectations, controls and maintenance access belong in that conversation alongside the equipment itself.
If you already have a system, replacement is only one possible direction. Its service history and observed operation may need review before a new installation is considered.
Prepare a useful project outline
Gather the details you already know: property type, rooms involved, existing equipment and the stage of any building work. Mention drawings or specifications you hold and identify uncertainties openly.
For a London project, use the contact form to describe your home and the ventilation requirement you want to discuss.