02/04/2013
Efficiency tidbits #1
All the different bits, pieces and equipment in your house make up a single system. Like your body, the performance of a house is affected by outside influences such as climate and weather, inside influences such as fuel use and overall health. When there is a change to one part of the system, it affects how the rest of the system works. If a change damages your body, you don’t perform as well. If energy efficiency measures are not carried out properly, the renovation can have a negative effect on the structure, the indoor air quality and the comfort levels of your house. A single change, or many small changes over time, can have an immediate or long-term effect on the way the house performs.
The ‘house as a system’ approach is based on straightforward physics: heat rises, but it also ‘wants’ to be in equilibrium. Therefore, heat also flows from warm to cold – from inside to outside in Canadian winters. Heat, air and moisture are all tangled up together in this basic premise. For example, reducing air leakage improves comfort levels and reduces energy consumption at the same time, as it protects the envelope from moisture damage. All good, right? But where does that humidity go that used to escape out those cracks and crevices? It stays in the house and condenses out onto cold surfaces, like windows.
Want to know continue reading more about the "House as a System" ? Then go over to the Blue House Energy page!
Blue House Energy: Online training in energy efficiency, building science, and construction technology for new and retrofit housing, since 2012.