WE SHOULD ASK WHAT THE PURPOSE OF ZERO CARBON HOMES IS.
THE ANSWER IS SIMPLE- TO REDUCE THE OVERALL CARBON EMISSIONS FROM THE HOUSING SECTOR.
Hold on! Is it being suggested that appliance energy is somehow different to heating, space heating, ventilation and lighting energy? That appliance energy can be generated anywhere, whereas all other energy requirements have to be generated on site or by private wire arrangement? Is this positive discrimination for the avid TV watcher [I include myself in this category], the toast and coffee consumer [and in this one] or the obsessive clothes washer and hooverer [not this one] Where is the logic?
There are other questions to be answered.
Does the on site renewable source have to last the lifetime of the house?
If the energy use calculation is theoretical, are the renewable sources output theoretical as well?
If not, who is going to monitor it and over what period?
If the house is extended, does the renewable source have to be upgraded?
If the house uses less energy with a different occupier can the occupier sell off some of the renewable source?
If the renewable energy source consumes more energy in its manufacture than it generates over its lifetime, does it still count as a renewable?
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