Ease of cleaning is well worth considering at the outset. Stay clean liners resist dirt build-up but pyrolitic cleaning is the ultimate. It burns off all baked-on debris at 500°C so that all you have to do is sweep out the resulting ash. Look out for ovens with a steam cleaning facility, too, and remember that some ovens have removable inner doors that are easy to clean.

When shopping for a new clothes dryer, look for one with a moisture sensor that automatically shuts off the machine when your clothes are dry. Not only will this save energy, it will save wear and tear on your clothes caused by over-drying. Keep in mind that gas dryers are less expensive to operate than electric dryers. The cost of drying a typical load of laundry in an electric dryer is 30 to 40 cents compared to 15 to 25 cents in a gas dryer.

The three-way tap delivers hot and cold water independently or mixed just like a normal kitchen mixer. For purified water in some cases, the centre lever or handle on the tap body is selected, and cold water is diverted to the purification unit which is fitted neatly away under the sink. After purification, the water is channelled through its own waterway inside the tap to deliver purified water at the point-of-use. Alternatives to this delivery system are also available.