If you enjoy eastern cuisine, you can buy a speciality hob with a wok burner. Similarly if you are a BBQ fan, choose a BBQ grill. If you are left handed, go for front rather than right hand side controls as this eliminates the risk of reaching across the heat. If you cook for a large family, more than four rings may be useful, and if you have young children it may be worth considering paying a little extra for a hob guard or in the case of gas, choosing an automatic re-ignition or cut off device should the flame blow out.

The EnergyGuide label on new refrigerators will tell you how much electricity in kilowatt-hours (kWh) a particular model uses in one year. The smaller the number, the less energy the refrigerator uses and the less it will cost you to operate. In addition to the EnergyGuide label, don't forget to look for the Energy Star label. A new refrigerator with an Energy Star label will save you between $35 and $70 a year compared to the models designed 15 years ago. This adds up to between $525 and $1,050 during the average 15-year life of the unit.

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.