Ovens - When buying an oven, your first decision should be whether you want a gas oven or an electric. This decision can be made according to your cooking preferences. An important factor to consider when buying an oven is the type of cleaning process it uses. Standard cleaning ovens require you to clean it yourself. Self-cleaning ovens often have programmable cleaning settings that use high temperatures to clean residue from the oven. You can also get continuous cleaning ovens that absorb or burn off splatters, making it even more convenient.

Refrigerators - A rule of thumb when buying a refrigerator is that you need to consider the number of people in your household to determine the capacity you need. For example, a family of two needs at least 8 to 10 cubic feet, then add another cubic foot of space for each family member. Remember that refrigerators with freezers on top are generally more energy-efficient than those with side-freezers.

Dishwashers - Always find out the amount of water a dishwasher uses for every different cycle. Features that reduce water usage are very important. The new stainless-steel models can improve energy efficiency during drying cycles and allows for higher water temperatures as well.

Ventilation Hoods - The most important thing to consider when purchasing a new ventilation hood is its fan. Axial fans are inexpensive but not as powerful as centrifugal fans. Also, tempered glass light lenses in a ventilation hood is essential. They are tougher than plastic lenses, so they will last longer. If you can, try to find one that has a low sone rating. Sones measure the noise level created by air-moving appliances, and the lower the sone number, the quieter it is.

Garbage Disposal Systems - When shopping for a garbage disposal, there are several things to consider in order to arrive at the best disposal to fit your needs. Think of how many meals per week are prepared in your kitchen, how often you entertain, and the importance of quiet operation and long product life. You also must know if you are hooked up to a septic system or regular water system.

Air Conditioners - When looking for a powerful air conditioner, check out the yellow energy tag (represented as Energy Efficiency Ratio or EER) and consider its efficiency. The EER numbers range from a minimum of eight to a maximum of 12. You'll want to look for high EER numbers. After this, you also need to consider the space of the room you'll be putting the air conditioner in, as well as your budget. Do you need to cool the whole room? Does the weather change a lot where I'm located? The answers will help you find a suitable model that will fit your needs. Try to match the unit's cooling capacity with the size of the room. According to the Department of Energy, air conditioner size should be determined by multiplying the room's square feet by 20.

Water Heaters - Again, energy efficiency is the important factor here. The EnergyGuide label gives you two important pieces of information when you're comparing different brands and models: estimated energy consumption and estimated yearly operating costs. Use this information to determine which models are the most energy efficient. As for tank size, it refers to the number of gallons of water that the water heater can hold. The more gallons of hot water you need per hour, the larger the water tank must be to accommodate the need. Of course there are also tank-less systems which heat water as you need it. Tankless water systems are powered by either electricity or gas and turn off when not in use. However, they have trouble supplying large amounts of hot water at any one time.