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An essential appliance in every kitchen, ovens are often closed compartments that are used for baking or heating purposes. Commercial ovens are efficient machines often located in restaurant kitchens that require a high turnover of food and accuracy in baking methods. The oven has been around for a very long time, with remnants of ovens found by archaeologists dating back to 3200 BC. However it was the ancient Greeks that really began to refine the baking process, inventing the front-loading oven that was used to bake all types of dough into bread and even cakes, similar to what we use today.

While having the capacity to produce breads, cakes, and other baked goods, commercial ovens can also be used for roasting savoury foods such as meat or casseroles. In an industrial sense, ovens can even be used to fire up non-food items like clay or other building materials. The only real duty of the oven is to provide an intense yet controllable amount of heat, which can be channelled into whatever a person needs heated up.

The heat source in commercial ovens can come from either the top or the bottom, which has a different effect on the way the food cooks. For casseroles or food like lasagne in which a browned top is desired, placing it close to a top-heating source is a good idea. However, for baked goods when an even cooking is required, a bottom heat source is better. When in doubt, placing the food in the middle of the oven is a good happy medium.

Commercial ovens are powered by either gas or electricity. In the past, they were fired by coal or wood, and wood is still used in certain circumstances in commercial kitchens, such as the cooking of pizza. Cooking with wood adds some of the smoky flavour into the food. Convection ovens use a fan to move the air around the interior of the chamber, meanwhile steam ovens use a bit of water to add steam into the chamber. All of these ovens can be adjusted depending on what is being cooked.

To most peoples surprise, commercial ovens have the ability to clean themselves. For anyone who has spent endless hours scrubbing off burnt flakes from the bottom of an oven, this is a breath of fresh air. There are two ways in which this works. Self-cleaning ovens use a concentrated wave of extreme heat to burn off the dirt, thus dissolving it. Continuous cleaning ovens on the other hand, are coated on the inside with a catalytic substance that works in opposition with the dirt, slowly destroying it over time.

With rising fuel and energy costs, many people are looking for their own alternative energy sources. Wind power generators have been use on farms for many years in varying degrees, before electric power became so readily available.

Building your own wind generator into your home is easy. The rule of thumb is to find a place that is about 200-300ft from another obstacle or at least 20 ft higher. In North America the average wind speed is around 9m/s, which can give you a lot of power.

Wind power is a great source of renewable energy. It is much cheaper than solar power per Watt, as a wind turbine can generate 1000W while a single solar panel generates around 100 in daylight.

To turn the rotational energy of the turbine into electricity, the actual power generator is the DC motor. You will have to pick one up or order one – they can cost $50 on up depending on size.

You will also need to buy a tower, or improvise one. Recycling towers is a good idea – people that have old TV towers they don’t use any more may actually pay you to take them away. You will also need some great engineering blueprints to get you started on your project.

Many people have bought guides and made their own 500 watt turbines from scratch using PVC piping, a DC motor, TV tower recycled and a grid connector unit. This can be done in less than a week and for less than $300. On the other hand the same turbine might cost $1500 or $2500 commercially.

The basics of wind power generators have been around ever since the old windmills you still see at farms across the plains and prairies. Now you can find plans on the Internet for building your own system, or buy components or kits that contain what you need to know.

If you have a bit of land or a rooftop to place it on, some PVC, a DC motor and something to make a tower out of, you can put together a wind power generator with basic tools quite easily.