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HOT WATER ON DEMAND, HEATERS
On Nov 25, 5:01*pm, harry wrote:
On Nov 25, 8:52*am, The Daring Dufas wrote: On 11/25/2010 2:33 AM, harry wrote: On Nov 24, 8:45 pm, *wrote: On Nov 24, 12:53 pm, *wrote: * Your *own, UK, certified testing standard, you are a nuts to keep this crap up because none are certified over 100%, none are even 91%. Your rating is more conservative than our US rating, read it and please stop the missinformation.- Hide quoted text - - Show quoted text - Here's one..... http://www.warmflow.co.uk/pdf/Gas_Boiler_Brochure.pdf Hang it up Harry your to old for this. SEDBUK shows no Warmflow over 90.4% Thats your UKs agencys ratings. *But just to show you you can`t even read a simple spec sheet . The Warmflow GS 25a is a Sedbuk A class. *It has an input rating of *KW *25 * *output KW *24.6. *Now you simply take out your pencil, sharpen it, get some clean paper *and subtract the two numbers and you will see your spec sheet shows it to be *97.6% efficient. Just what I said that 98% is the high and nothing is at or over 100%. Its real simple to grasp Harry, output is less than input. Hey Harry, I own the Brooklyn Bridge, I will sell it to you real cheap Try The SEDBUK things is for comparative tests on available boilers. *They probably haven't got round to testing this one (or updating their website) I can see you still haven't grasped the different between net and gross calorific values. What you say is true, but more heat is recovered by the condensing *of combustion gases. The figure given covers the chemical energy recovered from burning the gas. The additional heat recovered comes from the physical conversion of the water vapour to liquid. Because they were comparing condensing and non-condensing boilers at one stage they get these figures of over 100%, obviously only for condensing boilers. *Equally obviously not every condensing boiler has efficiency of over 100%, it depends on how big and how well designed is the heat exchanger. Also very important the flows of water inside the heatX and gases outside. If you look at the layout in the pictures, you will see the design is pretty untraditional. Excess air requirements are reduced. *The exhaust gases also pre-heat the incoming air in most cases. Harry, for these 100%+ boilers to work is a draft inducer necessary? I ask that because in the region of the U.S. where I live, you don't see many homes with boilers. The most common form of heat is a central HVAC forced air system. All of the high efficiency furnaces I service have a draft inducer blower and the higher efficiency condensing furnaces have one ore more drain lines internally to drain the condensate from the combustion chamber and draft inducer housing. TDD- Hide quoted text - - Show quoted text - There is no chimney in the normal sense. *They are "room sealed". *All you see outside the building is the horizontal air intake (about 4" dia,) and the comustion gas exit is a pipe concentric down the middle of it. *It projects maybe four or five inches. It is driven by an electric fan that blows the air/gas mixiture into the boiler. *In days of yore this was all bigger and *worked by natural draught/ convection. *Bacause the intake and the exhaust were concentric, they were unaffected by backdraughts caused by wind effects. *However when they went condensing there was no natural buoyancy left in the combustion gases to drive this system so the fan had to added.There are some pix here. The square one is the old fashioned one https://environment7.uwe.ac.uk/resources/constructionsample/conweb/heating/fluesfour.jpg Yes they are all fitted with drains. *The condensate is acid. (Dissolved CO2)- Hide quoted text - - Show quoted text - |
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