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Ventilation In Residential Homes

The average daily moisture production within a home from everyday activities such as cooking and bathing is typically around 5-10 litres.


Drying clothes indoors and keeping windows closed whilst cooking and bathing, without effective ventilation will only increase those moisture levels further.


High moisture in homes that are not adequately ventilated is associated with condensation, dust mites and increased mould spore concentrations - all leading to poor indoor air quality.


The results of poorly ventilated homes are musty air, streaming windows and black mould growth.


All of these symptoms will have a damaging effect on your health and wellbeing. In fact, damp and mould growth are recognised as a

Category 1 hazard by the Housing Health Safety Rating System.


The HHSRS states that damp and mould present threats to both physical and mental health, from:


  • House dust mites

  • Mould or fungal growth


Key Factors for Residential Homes Ventilation



What are the main causes of pollutants? In short they are washing, cooking, cleaning, using aerosols, smoking and breathing. These factors contribute to pollutants which in turn impact the quality of air in homes and eventually the health of the occupants. Good ventilation will help to deal with these pollutants.


Condensation, Mould and Damp

Condensation and mould have long been issues in homes and the need to safeguard against them has significantly increased. When people discover they have a damp or mould problem often they will purchase a dehumidifier. Unfortunately, a dehumidifier will not ventilate a home, can consume large amounts of electricity, be noisy and require regular maintenance by having to empty condensates. It is estimated that bathing, showering, cooking and drying clothes equates to four pints of moisture per person per day. Unable to notice this moisture in the air, it will first become evident when it comes into contact with cold surfaces, which it condenses onto. This is why a significant amount of condensation occurs overnight as the fabric of the building cools.


Dust Mites

Dust mites breed in the humid environment found in homes which are poorly ventilated. Clinical evidence suggests that exposure to high concentrations of allergens associated with the house dust mites over a prolonged period can trigger allergic symptoms such as rhinitis, conjunctivitis and eczema. Repeated exposures to these allergens can lead to asthma. The severity of the asthma intensifies when humidity, house dust mites and mould levels are increased. Clinical research has proven that whole home ventilation can play a significant part in controlling dust mite allergens (We do not claim that the use of the ventilation products we supply will cure asthma nor eliminate asthma attacks).



Radon is a naturally occurring radioactive gas which is both colourless and odourless. It enters buildings from the ground and can expose occupants to doses of radiation. It is estimated that 100,000 homes have a concentration of radon gas above the safe levels of 200 Becquerel per m2. Positive Input Ventilation (PIV) is a recognised method of radon control: increasing the internal air pressure will reduce radon entry into a dwelling and increase dilution of indoor radon (because of increased ventilation). Visit UKradon to learn more about Radon and to check if your area is at risk of Radon.


We can offer innovatively designed and UK manufactured Positive Input Ventilation products for residential homes, which are energy efficient and optimise air quality.


Positive Input Ventilation for Residential Homes.