We were having a lot of condensation issues throughout the house and getting black mould on the bedroom walls. We have used dehumidifiers, which didn't work and was sceptical about this product working too. I honestly cant believe how well its working. We live in a four bed semi detached and the unit is set on number 4. After the fist day the condensation was reduced to a small amount around the bottom of the windows. After that, the condensation has completely gone and the air in the house feels fresher to breath. Its very quiet in operation and cost me £70 for an electrician to install. Recommended.