Is there a minimum heating requirement for households?

This note arises from work to identify the effectiveness and cost of remedial treatments for condensation and mould problems in housing. Although the four factors - moisture generation, ventilation, insulation and heating - which control the likelihood of mould growths have long been established there hasnot been a straightforward way of showing their interrelationship, particularly where energy costs are important. By treating the problem essentially as one of air conditioning the Note shows how the fabric heat loss of the house and the rate of moisture generation define a minimum heat requirement to limit mould growth.