Chapman plumbers and heating engineers specialise in heating with a focus on ultra high energy efficient gas heating. We also specialise in renewable energy to enhance this, along with boiler repair, boiler servicing and new boiler replacement, as well as central heating design and installation in both domestic properties and commercial.
Our qualified gas engineers are fully certified and trained up to City and Guilds NVQ level 3. We are Gas Safe certified- reg no 535097 (formerly Corgi) and undertake all domestic and commercial/industrial gas work on boilers, cookers, pool boilers, overhead radiant heaters, tube heaters, gas boosters, commercial pipework, gas safety certificates, and tightness testing and purging, including servicing and repairs.
Our qualified gas engineers are fully certified and trained up to City and Guilds NVQ level 3. We are Gas Safe certified- reg no 535097 (formerly Corgi) and undertake all domestic and commercial/industrial gas work on boilers, cookers, pool boilers, overhead radiant heaters, tube heaters, gas boosters, commercial pipework, gas safety certificates, and tightness testing and purging, including servicing and repairs.
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We are a proud member of Ecotechnicians, a not for profit cooperative of engineers based all over the UK, who focus on higher standards within the industry and particularly the effective use of modulating controls on boilers. The heating industry within the UK has fallen far behind our European counterpart in terms of both standards and the adoption of technology.
To maximise the efficiency of your domestic boiler essentially lower flow temperatures are required which can only be achieved by compensating controls. But why? Well the main reason is the added energy from latent heat extraction, which can be achieved by compensating controls.
So in its purest form the only by-products would be CO2, H20 and heat, however if the combustion mix is starved of oxygen we run the risk of very high CO (carbon monoxide) which is a dangerous and unwanted by-product.To prevent this, boilers will generally add excess air to the combustion mix to keep on the safer side of combustion (see stoichiometric combustion).
So in its purest form the only by-products would be CO2, H20 and heat, however if the combustion mix is starved of oxygen we run the risk of very high CO (carbon monoxide) which is a dangerous and unwanted by-product.To prevent this, boilers will generally add excess air to the combustion mix to keep on the safer side of combustion (see stoichiometric combustion).
Thermal mass is the capacity a material has to absorb, store and release heat, it is directly linked to the specific heat capacity of the material and its size and density. This is not to be confused with insulation values, for example a slab of concrete can be of high thermal mass but not provide a very average to low insulation value, whereas gram for gram mineral fibre insulation the opposite would be true.
Its becoming an ever more increasingly popular question within our industry (well amongst ecotechnicians anyway), and one that has no real right or wrong answer, and they most certainly overlap, but there are some situations where one will outperform the other, It's all about a balance between comfort and efficiency.
There are two issues when you have a system operating at below neutral presure that cause cavitation. 1 is gases that come out of solution creating pockets of air (see Henries Law) and 2 is vapourisation. Both of these are very similar. For this to make sense you will need to learn that the definition of neutral is not the presure half way between the posative side of the pump and the negative.
Reviews (6)
Helen Rapson
Aug 10, 2020
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Danny Yates
Jul 01, 2020
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Adam has recently installed a Honeywell EvoHome system for me. We have a large, 1950s house with solid walls. Adam was very thorough in his survey, recommended where to site the controller for best signal, and even altered the piping to one of the radiators to put the HR92 in an optimum position for reception. As well as this, I had an antiquated setup with the pipes around the boiler and cylinder and with the wiring which Adam reworked whilst reusing as much as possible to keep costs to a minimum. Throughout his two days here, Adam was cheerful in the face of (1950s-era) adversity, chatty, tidy
J. Allen
Dec 23, 2018
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Sophie Wright
Oct 06, 2018
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Very impressed with installation of our new condensing boiler; Adam and Patrick extremely professional and nothing too much trouble (even getting rid of all associated rubbish and cleaning up afterwards too). No invasion of personal space, found them both very polite and great fun to be with and extremely informative about how everything works etc.
Pedro Fernandes
Oct 17, 2017
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Adam took on the challenge of improving our hot water system, after a builder left us with a huge mess.
He was not phased by the task and completed the work to a very high standard, always looking after our immediate water needs.
It was a pleasure to meet such a dedicated and experienced tradesman, who you can trust.
I would definitely recommend Adam.
He was not phased by the task and completed the work to a very high standard, always looking after our immediate water needs.
It was a pleasure to meet such a dedicated and experienced tradesman, who you can trust.
I would definitely recommend Adam.
Tris
Dec 20, 2016
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