Even this is a sliding scale however. This makes radiator balancing very important to ensure enough heat is given off to the room to lower the return temperature sufficiently. For more than a decade we have been urged to 'upgrade' to a high efficiency, condensing boiler to save money. Why is this happening? A-rated condensing boilers became mandatory in , but despite 20 million gas boiler sales no investment has been made to upskill the workforce to fit them correctly.
Rather than up-skilling its workforce, the gas industry has instead moved towards fast-track, one-size-fits-all, online boiler sales that have de-skilled the process to try to push prices down. It is no surprise that we have one of the highest replacement boiler rates in Europe see our Heating Heroes page for more on the industry failings we are trying to put right.
There are many reasons for such a large discrepancy between actual efficiencies and stated efficiencies:. In other words, oversized boilers send the wrong messages to consumers and installers that the smallest in the range must be for the smallest home. The smallest in the range will actually heat the vast majority of UK homes. As a nation we have grown so accustomed to larger boilers, particularly combi boilers which show outputs of kW, that we now push for bigger boilers, just in case.
However oversized boilers are at risk of wasting gas from excessive energy dumps of heat that cause the boiler the come on and off repeatedly. For a 21kW boiler common is most homes this would be around 15kW. Given that only 6kW is needed on a very cold day, the boiler is always going to overheat the system.
When the radiators cannot get rid of enough heat the return temperatures to the boiler are too high for it to condense. Find your local engineer. Find the right Condensing boiler for your home Get your free new boiler quote including installation using our online quote engine.
Get a new boiler quote. New Condensing Boiler Installation Condensing boilers are designed to provide homeowners with a highly efficient way of heating their home. How Do Condensing Boilers Work? Types of Condensing Boiler There are 3 types of condensing boilers; each has its own capabilities and unique features that may be suitable for different properties and central heating requirements.
Combi boilers: Manufactured to provide both heating and hot-water from 1 single unit Compact in size to save space On-demand hot water as no tanks or cylinders are required Read more about Combi boilers. System boilers: Manufactured to provide heating and hot-water with the use of an additional hot-water cylinder No cold-water tank is required; potentially saving space Designed to deliver hot-water to multiple taps simultaneously Read more about System boilers.
Energy-efficiency Designed to deliver quality central heating with reduced energy wastage, condensing boilers are designed to be highly energy-efficient. Designed to be environmentally-friendly Condensing boilers work to lower greenhouse gas emissions, potentially making them more environmentally-friendly than a non-condensing boiler.
Modern and diverse Many of the condensing boilers that we supply at HomeServe are compact in size and available in a range of different outputs to suit the heating and hot-water needs of a variety of homes.
Popular Condensing Boiler Brands At HomeServe, we work with some of the leading brands in the industry to provide you with a varied selection of A-rated, energy-efficient condensing boilers.
There is a plethora of brands that manufacture efficient condensing boilers. Examples include:. Awarded a Which? Best Buy for several consecutive years 5 star Which? Good Housekeeping Reader Recommended Aim to achieve ultimate customer satisfaction Founding principles of quality, innovation and value Find out more about Ideal boilers. A condensing boiler, on the other hand, captures air directly from the outside of the room it is placed in and is completely sealed for heat insulation.
Another safety advantage is that because the condensed liquid is disposed of via a pipe connected to the drainage system, there is no risk of being in contact with toxic substances. Advances in technology mean that modern boilers are incredibly reliable. However, because every type of boiler is different, they all have certain advantages and disadvantages.
For safety, if the outlet becomes blocked your condensing boiler will automatically stop. The most common cause for this is a frozen boiler condensate pipe. This is most likely to happen if your boiler has been fitted with a condensate pipe that is outside the building and therefore exposed to lower temperatures.
Although a relatively common problem during cold snaps, it is easily prevented and fixed. There are two key factors to consider when deciding what size of condensing gas combi boiler to buy - how much hot water you are likely to use and how many rooms you will need to heat.
For most standard bedroom houses with a single bath and shower, a combi-boiler of between kW is a good choice.
For homes with an additional en-suite bathroom or more rooms, a larger kW boiler would be recommended. Read our article on choosing the right boiler for your home for more advice and information. Welcome to Viessmann United Kingdom! It looks like you might not be in the UK? The products and services presented on this page may not be available in your country; find your local Viessmann website below.
Viessmann United States. Answer a few questions and find the heating system that's best for you. Find a product, get a quote. How to Bleed a Raditor.
However, this can be easily avoided by insulating the condensate pipe appropriately. The lifespan of a condensing boiler will vary on its build quality, model and usage.
However, you can prolong the lifespan of a condensing boiler through correct servicing. Servicing of your boiler should be done once a year by a Gas Safe registered heating engineer. See more on annual boiler servicing. Always check the warranty of your boiler to ensure you are choosing a quality option.
Vaillant boilers, such as our ecoTEC and ecoFIT models, come with a year guarantee as standard but can be extended up to 10 years through a Vaillant Advance installer. Since 1st April , all new gas boilers installed in the UK have been required by law to be condensing boilers. Since 1st April the same rule came into effect for oil boilers. Different sizes and boiler types suit different needs and property types, so it's best that you get advice from a local expert to find out whats most suitable.
Please bear in mind that the most expensive models with big outputs might not be the right solution for heating and hot water for your home as they could be oversized and as a result will not work properly, resulting in unnecessary spend. The size of a condensing boiler is measured by its kilowatt kW output. The more bathrooms, radiators and usage, the larger the boiler needs to be. For example, homes with bedrooms and one bathroom will often have a condensing boiler with a kW output.
In short, yes they are harmful and should not be inhaled.
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