Wissen über Heizen und Kühlen

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They are a vital part of your domestic central heating system, yet radiators rarely make it to the front row of the central heating components list. Central heating systems are often associated with a good boiler and a large cylinder in most people’s minds. However, radiators form a crucial component of the system together with other controls and TRV (Thermostatic Radiator Valves). A well built modern radiator can make a major impact on the performance of your central heating system, as well as have a major visual effect on the look of your rooms.

Radiators are over 150 years old. Franz Sangalli from Germany has registered a patent on radiators in 1855. They are effectively a hollow metal case, normally flat in shape that is attached to the wall of the room. Most UK radiators are made of sheet steel with attached fins to emit more heat.  The heating medium, most frequently water, is pumped into the top of the radiator. The hot liquid emits the heat into the room and as it cools off it drops to the bottom of the radiator and eventually out. The air around the radiator heats up and creates a convection effect drawing in colder air to heat up.

A typical domestic central heating system has a closed loop of pipes (normally copper) that over time develop pockets of trapped air inside them. The source of these air bubbles is either seeping through tiny cracks in the system of a result of chemical reaction that results gasses creation within the closed system. If such gasses (e.g. Hydrogen) are trapped within the central heating loop, it normally remains at the top of the radiator preventing the water from getting there and using the full area of the radiator for heating. In such case it is recommended to ‘bleed‘ the radiator from a bleeding screw at the top of the radiator. Radiators on upper floors tend to have more air pockets locked in them, due to the air’s natural inclination to rise to the upper-most point of the loop. As such, top floor radiators will require more frequent bleeding.

Most boiler manufacturers these days require the heating engineer installing the central heating system to power flush the central heating prior to commissioning. This ensures the system is clean from any debris that might have accumulated during the years (for example inner corrosion in older systems). Furthermore, most UK Corgi registered plumbers recommend adding a corrosion inhibitor chemical into the closed loop circulating water, to inhibit production of Hydrogen that would otherwise occur as a result of hot water coming in contact with iron.

The radiator should be sized according to the space to be heated and ensure the temperature is pleasant. Recommended temperature for the living room is 21c and for bedrooms and kitchen 18c. A correctly sized radiator will ensure the boiler is not overworked and is used in the most cost effective way.

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Source by Tal Potishman

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As the temperature drops, proper central heating becomes more and more important.  Ensuring that your central heating system is working correctly should be a top priority for you and your family with a single faulty part capable of ruining your winter holiday season.  There are a number of issues that can surface during the cold winter months.  One common issue is frost damage, which can harm boilers and pipes, preventing them from working efficiently. 

In previous years, the central heating system was designed with the frost thermostat located near the boiler.  Its job was to start the boiler when the air temperature dropped and stop the boiler when the air temperature reached an acceptable level.  If the thermostat detected excessive heat escaping from the boiler or surrounding pipes it quickly turned off the system, in order to conserve energy and prevent excessive heating of the home.

A new development in insulation materials for central heating systems has made the frost thermostat’s job much more challenging.  Modern boilers and pipes are much more insulated than their older counterparts.  Energy conservation was the goal of this alteration; unfortunately the problem of overheating persists.  The frost thermostat is no longer able to detect changes in temperature accurately.  As such, overheating and energy waste continue to occur.

Installing a pipe thermostat can solve this problem.  A pipe thermostat is typically placed on the outside of the boiler return pipe, measuring the temperature of the pipe (assuming copper pipes are good heat conductive materials).  Its purpose is to turn off the boiler before overheating occurs.  There are several new products that contain both a frost thermostat and low limit pipe thermostat, providing standard room temperature setting capabilities along with frost protection capabilities.

Installation and set up of these new thermostats is simple and quite intuitive.  Guidelines for complete wiring and installation arrive in the kit, ensuring simple installation.  The frost thermostat is usually set to 5C and the pipe thermostat is commonly set to 25C.  Additional pipe thermostats can be bought for other exposed pipes, to further insure that your system is completely protected.

If the pipe thermostat fails to meet your needs, there are other solutions.  A fully programmable room thermostat is one option.  These devices can be installed in a number of locations throughout your home, usually in a living room or bedroom.  Their job is to measure and monitor the temperature of the room.  The thermostat can be set to change the room temperature several times a day, depending on the homeowner’s needs.  There are several kits that operate by means of radio signal, from the thermostat to the boiler.  These Radio Frequency (RF) thermostats require no wiring, which makes them very easy to install.

Thermostats are an important element of your home heating system but, there are other variables that impact your heating efficiency.  By sectioning the home off into zones, waste can be avoided.  The use of zones, allows you to focus the heat where you need it most.  More populated areas can be kept warmer than empty rooms that do not require as much heating.  This minor change can produce great results.  Not only will heating bills be lower but, system efficiency will be greatly improved.

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eMail: info@heidelbergerwohnen.de
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Source by Tal Potishman

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Offering efficiency levels of over 85 percent condensing boilers are by some distance the most energy efficient type of central heating boilers currently available in the UK.   In comparison a new standard boiler will be at most 78 percent efficient with older systems being as little as 60 percent efficient.

A condensing boiler makes better use of the heat that it generates from burning fuels such as gas or oil. They work by recovering the heat that would normally be wasted by conventional boiler systems.   In a conventional boiler some heat is lost because the boiler releases very hot waste gases from its flue.   Instead of wasting this energy a condensing boiler uses some of the heat from these waste gases to heat water returning from your central heating system, so it requires less heat from the burner. This makes your condensing boiler more efficient.

Choosing to install a condensing boiler is a great idea for a number of reasons.  As the most energy efficient type of boiler they require less energy to heat your home.  Since you are using less energy your heating bills can be reduced significantly.  Although condensing boilers are a little more expensive than other alternative heating systems through savings on your heating bills this extra cost can be paid back within two years.

Condensing boilers are also an environmentally friendly heating system for your home.  By using less energy they help to reduce your carbon footprint.  Used in conjunction with cavity wall insulation and double glazing they are perfect for both making your home environmentally friendly and keeping your home warm all year round.

Condensing boilers fall into two main categories – regular and combination.  Since combination boilers aren’t compatible with all types of central heating system it is best to seek the advice of a professional heating engineer to find out which type is most suitable for your home.

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Source by Rich Bendall

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Repairing or replacing your central heating system can be an expensive process. By taking a few preventative measures you can greatly reduce the amount of problems you are likely to experience over the lifespan of your central heating system.

This will not only save you money by making your system less susceptible to breaking down – but actually prolong the efficient working life of the boiler.

Over time your central heating system will accumulate a number of compounds that are detrimental to the efficient operation of your boiler – such as lime scale and iron oxide. The iron oxide compounds are created by the slow corrosion of your central heating pipes and radiators, and the lime scale is created by the precipitation of the calcium compounds out of the hot water itself*

Iron oxide takes on the appearance of black sludge in your central heating system and Calcium Carbonate will resemble the white chalky lime scale in your kettle at home.

Both of these compounds stick to the surfaces of your system causing premature failure to your heat exchanger (inside your boiler) hot water heating coils (inside your cylinder) valves, and any pumps you have installed.

Having these compounds stuck to the inside of your central heating system will also significantly affect the efficiency of your boiler by reducing the heat transfer of the circulating water within it. An inefficient boiler will of course burn more fuel than necessary and with energy prices the way they are this in turn will cost you money! It will also increase your carbon footprint and your personal impact on the environment.

By following the tips below you will be helping prevent:-

• Pump failures
• Radiator cold spots and failures
• Radiator leaks
• Boiler noises
• Boiler breakdowns

1. Powerflush your central heating system

A powerflush or power flush is the process by which a machine is connected to your central heating system to dislodge and remove the build up of compounds within it. This is achieved by vibration and the pumping of water at high velocity but low pressure (to prevent damage) through the system until clean.

Chemicals are incorporated in to the process at the start and the end to assist with the removal of debris and also to prevent future corrosion.

A strong magnet is often incorporated in to the machine to remove iron oxide and other metallic compounds present in your system.

1. Use a corrosion inhibitor

As mentioned, metal within your central heating system will corrode over time.

To prevent this process taking place or more accurately to delay this process, an inhibitor can be added to your system. An inhibitor is a chemical compound which when added to the water in your central heating system creates a thin film on the surface of your pipe work thereby decreasing the rate at which the metals and alloys within it corrode when in contact with water.

The correct quantity and type of inhibitor will substantially reduce the effects of corrosion. In some cases by as much as 90%. Inhibitors are commonly added to a central heating system after a power flush has been performed.

1. Install a filtration system

As mentioned earlier your gas central heating system may contain a lot of corrosion and lime scale which will ultimately damage your boiler, pumps and valves. A water filtration system will remove particles and compounds that are freely circulating through your central heating system preventing these particles from entering your boiler and pumps and clogging them up!

Numerous filtration systems are available on the market today and many will incorporate a magnetic filter to remove the iron oxide (rust) created by the corrosion of your system e.g. Magnaclean.

1. Regularly servicing of your boiler

An annual service of your boiler will extend the operational lifespan of your central heating system by indentifying any faults or progressive defects manifesting in the system. It will also reduce the cost of repairs and decrease the chances of an outright

boiler failure – as faulty valves and pumps can be replaced as they wear and before their failure puts unnecessary strain on the rest of the system.

Faulty gas appliances are a serious hazard to health so the most important benefit derived from having your boiler serviced is the knowledge that your boiler is safely functioning and is of no danger to you or your family.

1. Use the services of a reputable, reliable gas company

Reputable and reliable gas engineers can be hard to come by when you need one most. By anticipating your future needs and developing a strong relationship with a company or engineer specialising in central heating, you can avoid the time consuming and sometimes frustrating act of trying to book an engineer to service or repair a faulty boiler.

Companies like www.serviceteam.co.uk can organise an annual boiler service for a fixed fee and provide you with same day services should you have a problem that requires immediate repair.

They will also keep detailed records of your central heating system on file, and will be able to notify you in advance of repairs or replacements required that may have been identified when they serviced the boiler.

This continuity will save you time and money in the long run as in many cases the diagnostic process will be reduced or eliminated.

(*Calcium Carbonate is present and soluble in cold water however when the water is hot it precipitates in to the chalky white substance you may be familiar with inside your kettle!)

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Source by Jo Harris

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Homeowners up and down the country in the UK are returning home from work to find their humble abode is freezing cold. They then turn the central heating on and have to wait an hour or so for it to heat the whole house. This situation isn’t ideal, but if you have a digital thermostat which you can pre-set to warm your home when you want it to, then you can make sure you never have to return home to a cold house ever again!

A Simple Upgrade

It sounds like a simple idea, and it is, but some people won’t be fortunate enough to have a digital thermostat with their central heating system, thus they won’t be able to pre-heat the home ready for their return home from work. However, if you call up your central heating engineer then you may find that he is able to install a digital thermostat for you without having to upgrade the whole central heating system. This is a good idea, and you will be glad of the digital thermostat in winter.

The Flexibility You Need

You might be wondering just how flexible a digital thermostat is. These days, your central heating system can be programmed to work around you and your home life. If you get up early in the morning and want the radiators to be warm as you stumble out of bed bleary-eyed then a digital thermostat allows you to pre-heat the system so it comes on an hour before you get out of bed. No need to rush for the dressing gown in the mornings! In addition to this, coming home after a long day at work can be made much easier simply by having the central heating turned on for when you walk in. If you finish work at 5.30, set the thermostat to come on at 4.30pm and you should find that every room in your house is toasty warm by the time you get in.

So, if coming home to a warm house makes your eyes light up, you can make it a reality simply by calling your central heating engineer and seeing if he can upgrade part of your system. For example, it could be central heating Swindon or elsewhere in the UK, but there are always engineers out there ready to help provide you with a more efficient system.

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Tel: 06227-399170
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eMail: info@heidelbergerwohnen.de
Internet: www.heidelbergerwohnen.de
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Source by Sarah Davis