Maintenance
How to fix a leaking tap
Most of the time, if a tap in your home is leaky, dripping or hard to close it's the result of a broken washer. While it's possible that your leaking tap's a 'washerless' tap (i.e. one with a ball, cartridge or ceramic disc mechanism - see the 'Types of taps' article linked below), it's a lot less likely that these taps will be leaking like this. You can usually tell if you have a ceramic disc type tap because it'll only need a quarter or half turn to fully open the tap.
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How to cool different sized areas
The size of the area you're cooling will have a dramatic effect on how you're able to cool it. Likewise, the way a room is cooled also depends on how it's shaped.
Solar payback time: assumptions and descriptions
The assumptions and descriptions that explain the figures show in our 'Payback times for solar panels' article.
Solar power checklist
The solar power checklist is a big help if you're considering installing solar panels. It tells you the many things you need to know, including things that your supplier mightn't mention.