Going to the extra effort to make a building airtight has which advantage(s)?

According to Rob's lecture what is the death of most buildings?

Consider a house with tradition halogen bulbs for lighting.  Each bulb consumes 50W.  Assume all the energy in converted to heat.  If there are 30 bulbs running, but these are substituted with 9 W LED lights, how many less Watts will be emitted into the house?

Keeping buildings cool is more of a challenge than keeping buildings warm because buildings have a range of appliances (TVs, fridges, kitchen equipment, lighting) and people that emit heat.

Conduction, convection and radiation are best described by (in order):

Loosing heat via evaporation uses which for of heat transfer?

The most sensible arrangement for air flow within a home is to have the internal intakes in the rooms that people spend the most time (living room, bedrooms) and to have the outlets in the kitchen, bathroom and laundry.

What's the name fo the device used to absorb heat from outgoing air to minimise heating requirements for a well-sealed house?

In the first table that Rob discusses, it shows the average daily intake is 9700 kJ to maintain minimal activity.  In the table it suggests this is 75-100W.  But how many watt is it precisely (to the nearest W)?

Read this paper on impacts of CO2 on cognitive impacts of elevated CO2

The paper concludes that at high CO2 levels cognitive ability is affected.  At what level what the impact observed?