A house with its systems out of balance may cause a building failure (e.g. high energy consumption, wood rot, mould, drafts, combustion spillage, and condensation). When retrofitting one part of the home there will be an impact on the overall system. Quality implementation of multiple complementary HAAS solutions can help bring the house back into balance and/or avoid unintended consequences from single retrofits.

By taking HAAS into consideration when planning each home retrofit, contractors and renovators can advise homeowners on the importance of well-planned whole-home renovations.