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FANGKUAI is founded in 1998, which is a clean fuel boiler enterprise integrating R&D, manufacturing, sales and service. In the past 20 years of development and innovation, the company has grown into a global enterprise, and its products have been exported to more than 80 countries including Russia, Mongolia and Thailand, and have established long-lasting cooperative relations with local enterprises!

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Condensing theory - How do condensing boilers add …

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Popular products


θrion Gas Fired Steam Boiler


Rated thermal efficiency: 100-104%

Fixed working pressure: ≤1.6MPa

Applicable fuel:natural gas etc.


Gas(oil) Fired Integrated Hot Water Boiler


Rated thermal efficiency:96-98%

Fixed working pressure:≤1.25MPa

Applicable fuel:Natural gas, light oil, etc.


H6 Gas Fired Hot Water Boiler


Rated thermal efficiency: 97.2-106%

Fixed working pressure:0.1MPa

Applicable fuel:Natural gas, etc.


T7 Vacuum Hot Water Boilerr


Rated thermal efficiency:≥105.5%

Fixed working pressure:-0.02MPa

Applicable fuel:Natural gas, etc.


V6 Gas Fired Hot Water Boiler


Rated thermal efficiency:97.2-104.4%

Fixed working pressure:1.0MPa

Applicable fuel:Natural gas, etc.


Electric Steam Boiler

Capacity:0.5-4.0 t/h

Rated thermal efficiency:98%

Fixed working pressure:≤1.25MPa

Applicable fuel:electric energy


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  • Do condensing, 90%+ boilers always condense? — Heating

    A condensing boiler extracts additional heat from the waste gases by condensing this water vapor to liquid water, thus recovering its latent heat of vaporization. A typical increase of efficiency can be as much as 10-12%.Get Price

  • Condensing: or not condensing? |

    Sep 27, 2009 · Condensing is dependent on the return temperature. This has to be below 55 deg C. It does not matter what the flow temp is. Some boilers are still designed to run with an 11C differential, so if the flow temperature is above 66C the boiler will rarely condense. Other boilers now use a 20C differential, so you can be sure of condensing, provided Get Price

  • What's the best temperature for a condensing boiler to be

    Jan 22, 2019 · For the condensing boiler to operate at maximum efficiency, the secondary heat exchanger's surface needs to be equal to or below the dew …Get Price

  • Condense Boilers

    Condensing theory - How do condensing boilers add efficiency? - … 2020/6/30 · Condensing regular boiler. A condensing regular boiler requires a cold-water storage tank in your loft that feeds the hot water cylinder. The water is heated up in the cylinder meaning you have a large amount of hot water ready to use that … Read MoreGet Price

  • - How to maximise domestic condensing boiler efficiency

    A condensing boiler has two main heat exchangers. This time the water enters the secondary (and condensing) chamber first. Picking up latent heat from the hot flue gases as they cool. The moisture in the gases condenses into droplets that form at the bottom of the heat exchanger.Get Price

  • Modern HydronicSystem Designs for Condensing Boilers

    Mar 05, 2020 · The process is called condensing because the heat needs to turn back into water before it leaves the flue via the second heat exchanger. When the temperature of the water - as it returns to the boiler - is less than 54 degrees C, the boiler will run in what is known as 'condensing mode'. This is when the boiler starts to recovers its lost heat.Get Price

  • Can you add an unvented cylinder to a combi boiler?

    May 30, 2020 · Click to see full answer. Then, can you have a cylinder with a combi boiler? A combination or 'combi' boiler is both a high efficiency water heater and a central heating boiler in a single compact unit.Combi boilers heat water directly from the mains when you turn on a tap, so you won't need a hot water storage cylinder or a cold water storage tank in the roof space.Get Price

  • China Condensing Laundry Steam Boiler Supplier and Factory

    Getting started; Condensing Laundry Steam Boiler; Condensing Laundry Steam Boiler - Factory, Suppliers, Manufacturers from China. With dependable high-quality method, fantastic standing and ideal purchaser assistance, the series of products produced by our firm are exported to many countries and regions for Condensing Laundry Steam Boiler, Oil Gas Boiler, Steam Boiler 10 …Get Price

  • The Harsh Realities of Mod-con, Wall Hung and Combi Boilers

    Introducing the Accel CS Condensing Boiler. To overcome the inefficiencies of these poorly designed combi boilers, Energy Kinetics created the Accel CS Condensing Boiler, the most efficient and longest lasting condensing boiler on the market.Not only is the Accel CS constructed with superior materials, it was designed by Energy Kinetics' engineers who possess a long …Get Price

  • Sizing a Modulating Condensing Boiler - GreenBuildingAdvisor

    Apr 27, 2018 · Have I analyzed a combination heat / hot water modulating condensing boiler sizing correctly? Best options? I am a homeowner looking at combination heat and hot water modulating condensing boiler options to replace an existing gas forced hot water boiler and a 40-gallon gas hot water heater. I have analyzed the combination systems using techniques from …Get Price

  • running non-condensing boiler at lower temp - does it make

    Dec 29, 2011 · I decided to do some research since it wasn't clear to me why it would be more efficient. I read some technical papers online and it seems that it makes a lot of sense for condensing boilers – you extract all this latent energy when the water does the phase shift at lower temps (~130F) and that boosts the efficiency by 10-12%.Get Price

  • Consider Installing a Condensing Economizer

    Condensing Economizer, to learn about these efficiency improvements. A conventional feedwater economizer reduces steam boiler fuel requirements by transferring heat from the flue gas to the boiler feedwater. For natural gas-fired boilers, the lowest temperature to which flue gas can be cooled is about 250°FGet Price

  • Condensing theory - How do condensing boilers add

    Modern HydronicSystem Designs for Condensing BoilersGet Price

  • Optimal flow rate for condensing boiler — Heating Help

    Optimal flow rate for condensing boiler I have a Vitodens 200 8-32 for a two storey brick 1914 house(of 2700 sqft including basement) heating a combination of about 350 sqft of cast iron radiation on a fat pipe gravity system converted to forced circulation as well as 400 sqft of cast iron radiation piped home-run.Get Price

  • Condense Boilers

    Condensing theory - How do condensing boilers add efficiency? - … 2020/6/30 · Condensing regular boiler. A condensing regular boiler requires a cold-water storage tank in your loft that feeds the hot water cylinder. The water is heated up in the cylinder meaning you have a large amount of hot water ready to use that … Read MoreGet Price

  • Tips for combustion analysis of commercial boilers | 2016

    Feb 17, 2016 · Most condensing boilers have a positive flue and require a sealed vent. Stack temperature. This temperature is an indication of the heat transfer ability of the boiler. If the stack temperature is too high, the burner is not transferring heat into the boiler.Get Price

  • Condensing Boilers - Fluid Handling, Inc.

    May 28, 2017 · When an old cast iron boiler fails, the decision arises as to whether a condensing boiler would be worth the added investment. Most older systems designed to operate with cast iron boilers were designed with water …Get Price

  • Basics of hot water heating boilers - Specifying Engineer

    Sep 18, 2020 · Condensing boilers have become the most commonly installed boilers in new installations, where the entire system is designed to take advantage of the increased efficiency afforded by lower water temperatures. The lower complexity of hot water boilers and hot water systems have a proven history of safe, reliable and efficient operation when Get Price

  • What is a Condensing Boiler and How Does it Work?

    How To Optimize Your Condensing Boiler System For Maximum Get Price

  • What is a Condensing Boiler and How Does it Work?

    How to Maintain Your Condensing Boiler - Ohio HeatingGet Price

  • How much energy does a condensing boiler - Do It Yourself

    Apr 10, 2020 · Boiler continually condensing; 11.66KW @ 50p/m3 = 4.3p/KW Boiler operating at non-condensing temperature;10.73KW @ 50p/m3 = 4.6p/KW Both those outputs are potential, not actual. It's perfectly possible to construct an example and operate a boiler ON/OFF and non-condensing and be more fuel efficient than running continuously condensing never Get Price

  • Boiler condensate pipe regulations| Living by HomeServe

    Sep 22, 2021 · A condensing boiler is any boiler that uses condensing technology to reuse the heat they generate from burning fuels such as gas or oil. Before 2005, older, non-condensing boilers wasted between 30-50% of heat due to combustion gases escaping via the flue. A condensing boiler, in comparison, can be up to 92% efficient.Get Price

  • Condense Boilers

    Condensing theory - How do condensing boilers add efficiency? - … 2020/6/30 · Condensing regular boiler. A condensing regular boiler requires a cold-water storage tank in your loft that feeds the hot water cylinder. The water is heated up in the cylinder meaning you have a large amount of hot water ready to use that … Read MoreGet Price

  • how much is the condensing boiler

    Busting The Myths About Condensing Boilers | GreenMatch. Mar 19, 2021 · Condensing boilers can replace most of the existing boiler systems. As it is usually the case with the conventional boiler replacement works, the effectiveness of the control system and type of hot water cylinder should be assessed when conducting a site survey, if one wishes to capitalise as much as …Get Price

  • Thermal Store and Condensing Boiler | Screwfix Community Forum

    Sep 03, 2005 · ensures the boiler only ever sees a 75/55 deg load (except on commissioning start up) or any other, if set to return at 20 deg less than delivery. Not only does this agree with the condensing theory to force the return down to approx 55 deg, but also ensures that regardless of heat taken out, only water at 75 deg is passed back into the cylinder.Get Price

  • Condensing boilers - heating hot water - timed or

    Modern (Glowworm I think) Condensing combi boiler with internal tank. We were running hot water on constant and heating on twice a day, hot water is set to 67deg from memory.Get Price

  • Low Temperature Heating - Energy Stats UK

    Direct from the factory many Combi Boilers are set to heat the water within your central heating system and radiators at around 70 degrees celsius. The problem with this practice is that condensing combi boilers do not condense at 70 degrees and …Get Price

  • Domestic condensing boilers explained - Sources of do it

    A condensing boiler. A condensing boiler uses modern technology to maximise the efficient use of the fuel (usually gas or oil) - typically a condensing boiler will be up to 90% efficient, whereas old boilers can be as low as 70%. The design of the …Get Price

  • Boiler Flow Rates — Heating Help: The Wall

    Just seems like a waste to have the boiler pump circulating away at 3-5 GPM or whatever even when the secondary loop is only flowing at 1.5 GPM (say if only the basement loop is calling for heat.) In my mind, this equates to high return water temps, which could keep the boiler from condensing adequately like we want.Get Price

  • KN-Series | The One and Only Condensing Cast Iron Boiler

    Cast iron is an ASHRAE-approved material for condensing boiler applications. Synonymous with strength and resiliency KN-Series boilers have proven over the last 15 years to be not only one of the most efficient boilers on the market but by far the most durable. Strength. Durability. Longevity. Reliability.Get Price

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