Boilers and Home Heating
There are several kinds of green boilers. These could be Combi, Micro-HP, wood pellet, log burning or gas condensing. The choice of the green boiler top use will depend on the type, size and fuel that best fits your needs. One should also consider whether you have one and are looking to upgrade or you want to buy a new one. This article focuses on giving out the best options available.
Boilers range from 12 kW to 40 kW for home use. It is very important not to choose less than what you need on average or more than you need on average. If one chooses incorrectly, they increase the inefficiency of their boilers.
These are used to control and manage the boiler power consumption. One should fit them to their current boiler if they are available. The boiler controls include a boiler interlock, an arrangement of controls, programmable room thermostats, time switches and cylinder thermostats. This ensures that the boiler only fires up when there is need.
These are the best choice for building with enough space for a hot water tank. These contain chambers where hot gases transfer their heat to water and heat it up. A second stage of heat exchange removes further heat from the host escaping gasses to preheat water coming to the first chamber. This maximizes the efficiency of the boiler. The waste gas cools off in an acidic water called the condensate and water vapour giving the boiler its name.
Manufacturers claim it is 98% efficient. An energy test by Energy Saving Trust in the UK found them to be about 85% efficient.
These give an on-demand warm water source without the need for a storage tank. They are ideal in small houses where there is no room for a storage tank. The same ESET trial gave them an efficiency of about 81%. They give about 9 to 18 liters of warm water per minute. The average temperature of the warm water being output is about 35 degrees Celsius. They are not for use by multiple users simultaneously and they consume 30% more to supply 10,000kWh of heat that regular boilers would supply. They are for small homes only.
These are the size of the domestic fridge are they are fairly new. They produce up to 1kW of electricity per hour and give out about 10kW of heat making them theoretically more efficient than a heat only producing boiler. They are best for homes that demand large amount heat and they are small to medium in size. They require a minimum of 11 hours of heat per day. Their outputs are chosen in such a way that they match the base heating load so that they operate intermittently but for long hours. The value of electricity generated therefore ends up paying for the marginal investment in about three years. Their carbon savings averages about 6-10%. The total payback will come in about five years. It is not therefore good for small homes which will use less of heating in the specified time frame.
Wood pellet and woodchip boilers
According to Energy Saving Trust, wood pellet boilers can save up to 580 pounds per year when compared to their electric counterparts. They wood pellet require that there be enough storage, loading and delivery of the fuel. The wood also requires a place where it can dry, and not get wet when it rains. Higher moisture content will affect their caloric value. This means that they must be dried at least for a year by natural means to be efficient. Their burning does emit toxic chemical which can kill. They are however much reduced when the burner reaches its optimum operating temperature of 200 degree Celsius. Incinerators are legally impelled to operate at 800 degrees for this reason. At this temperature, the pollutants are chemically broken down.
They need a back boiler to heat a room and water as well. They will consume large amount of fuel to do this. They are best if one has a source of biomass. An animal farm, would find it very ideal. They can produce 5kW to 50 KW.
In some cases, you may find that there are local heat sources that are cheap or free. These could be vegetable oils from a catering business or biodiesel. These are chemically identical and some boilers can be converted to utilise them. By following these guidelines, one can be safe, cut down on energy costs, cut down on carbon emissions and be warm and happy.
Some models can be programmed to come on automatically like a conventional boiler and be operated by remote control.
However, the fuel may be more expensive and cause more global warming than locally-sourced timber.
For any boiler, the rule of thumb is to make sure that it is well insulated when installed. The room to be heated should also be well insulated to save on energy lose.
If your home was built after 1930 the chances are it has cavity walls, meaning an inner and an outer wall. Cavity wall insulation fills the gap between the walls by drilling holes in the outer wall and pumping in insulation.
If your home was built earlier then you most likely have solid walls. Solid wall insulation consists of packing insulation on the inside or outside of the walls and can be expensive to install, but it can also save a lot of money. Homes are different and so are buildings. Each should be treated differently.
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