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Domestic hot water and heating series: gas hot water boiler, vacuum hot water boiler, vertical atmospheric pressure hot water boiler, electric hot water boiler Factory use, high temperature steam: wns fuel gas steam boiler, szs water tube steam boiler, vertical steam boiler, electric steam boiler

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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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Why is the boilers idf condensing boiler curve so linear

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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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  • The boiler temp control

    If the boiler temperature control is set too low, the hot water cylinder thermostat will never be satisfied and will continuously 'call for heat' (as we say in the trade) so the boiler will continuously cycle ON and OFF. This wastes fuel and heat so paradoxically, for economy it is better to set the boiler temperature control higher than lower.Get Price

  • 97% 46% - High Efficiency Hot Water Boilers and Heaters

    Why do so many condensing boilers look the same and why are they so BIG? Tall welded boxes, virtual copies of each other, mimicking designs decades old. And BIG…is being kind. Most point to lackluster transfer properties of stainless steel. Maybe… we think the industry got lazy. Technology improves overtime and condensing is not immune.Get Price

  • (PDF) OptEEmAL: Decision-Support Tool for the Design of

    Jun 21, 2019 · supported include: hot water boilers condensing and non-condensing (natural-gas, diesel and bio-mass), combined heat - power - units, heat pump s, geothermal heat pumps, ch illers and solar Get Price

  • The right boiler Best of the Best - Page 2 - Heating Help

    January 2017. BPH said: To suggest that a condensing boiler in condensing range can meet his heat loss with 70' of bb is optimistic. I think you are missing the mark. The house is obviously over radiated. Sure, on the few days of the year that he actually sees design temps he may need to run ~150 degree water.Get Price

  • What Temperature Should My Combi Boiler Be Set At? | Vaillant

    The exact temperature setting for a combi boiler is not set in stone, though there are some generally accepted guidelines for efficient operation and heating performance. For a modern combi boiler, the radiator heating temperature should be set at or around 75 degrees celsius for the best efficiency and performance.Get Price

  • Condensing Boilers Reduce Heating Energy …

    Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential ApplicationsGet Price

  • BetterBricks | Boiler Operations & Boiler Maintenance | O&M

    The temperature will be higher than the working fluid in the boiler. In non-condensing boilers, it must be high enough so that the water vapor in the exhaust gas does not condense and bathe the heat transfer surface in the corrosive condensate. Condensing natural gas boilers are designed and built with materials designed to resist corrosion.Get Price

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

    The reason condensing boilers achieve such high efficiencies is that they have the ability to recapture the latent energy from the moisture in the combustion gases when those gases condense. For condensing to occur, the boiler's heat exchanger surface temperature must be below the flue gas dew point.Get Price

  • Ideal water temperature for baseboard - GreenBuildingTalk

    Oct 22, 2011 · The general rule of thumb is with non-condensing boilers, that you reap ~3% in fuel savings for ever 10F you can drop the distribution temp. If you have a very tight and well insulated house with the boiler and all distribution plumbing within the fully conditioned space, or all of your near-boiler and distribution plumbing is insulated to R6 or better your savings will be somewhat …Get Price

  • High efficiency boiler recommendations | Terry Love

    Dec 12, 2018 · It's shocking how many modulating condensing boilers get installed where the installer programs it for 180F, no reset curve, and just walks away. To get any condensing efficiency out of it requires the boiler run at 130F or lower as much as possible, but whether it can be run there without short-cycling depends on your zone radiation.Get Price

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

    Jan 22, 2019 · How condensing boilers work. With a traditional boiler, fuel is burned to heat your water but a large portion of this is lost out of the flue. With a condensing boiler, there's a secondary heat Get Price


    Jul 05, 2019 · A few days ago my pressure sensor has gone. This is a wall- mounted condensing boiler, with a heat output, with a closed circuit hot- water heating boiler, type B23, C13, C33, with a linear power mod- ulation. They are considered good but expensive in France. Instead they are offering a modification. I did get a technical manual with this.Get Price

  • 2022 New Boiler Installation & Replacement Costs - HomeGuide

    Jan 11, 2022 · Condensing vs. non-condensing hydronic boilers A new condensing boiler costs $1,900 to $7,000 on average, while non-condensing boilers cost $1,200 to $5,000 for the unit. A condensing boiler reclaims exhaust fumes to reduce external heat loss through vents, which increases the boiler's energy efficiency.Get Price

  • Sizing a Modulating Condensing Boiler - GreenBuildingAdvisor

    May 24, 2016 · For the past few decades, an increasingly popular space heating option is a system with a modulating condensing (mod-con) boiler. Because these boilers can potentially have a high efficiency (90-95% or higher), they are often promoted by state and utility subsidy programs. In a well-designed system, the boiler's efficiency can hit or even exceed its …Get Price

  • Condensing Boiler Optimization - SlideShare

    Mar 07, 2017 · Condensing Boilers • How it works: – 2nd condensing heat exchanger – Less waste heat up the chimney – If return water temp is low, more heat is exchanged from the combustion gases to the boiler water: increasing …Get Price

  • Gas-Fired Boilers - Code Compliance Brief | Building

    The intent of this brief is to provide code-related information about gas-fired boilers to help ensure that the measure will be accepted as being in compliance with the code. Providing notes for code officials on how to plan reviews and conduct field inspections can help builders or remodelers design installations and prepare construction documents, and provide jurisdictional …Get Price

  • Measure Guideline: Condensing Boilers - Control …

    Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential ApplicationsGet Price


    Condensing boilers have been in use for space and domestic water heating in many countries for some years now, and in the present work their potential for using them in …Get Price

  • Designing efficient, effective boilers - Specifying Engineer

    Apr 14, 2014 · Section I—Power Boilers covers electric boilers, miniature boilers, and high-temperature boilers for stationary service and power boilers for portable service.Section II—Materials covers specifications for ferrous and nonferrous materials. Section IV—Heating Boilers covers rules for design and construction of a heating boiler, defined as a steam boiler …Get Price

  • PROJECT MANUAL -VOLUME 2 OF 2 Addition and Renovations to

    ASME Boiler and Pressure Code is required, and shall be stamped with a maximum allowable working pressure equal to or greater than the water heater (unless authorized otherwise by the Texas Department of Licensing and Regulation, Code Review and Inspections, Boiler Program); "Watts" Series DETA. 2.04 BACKFLOW PREVENTERSGet Price

  • Measure Guide Condensing Boilers - Energy

    Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential ApplicationsGet Price

  • Oil-Fired Boilers | Building America Solution Center

    However, when selecting the outdoor reset curve set points for a condensing boiler, choose settings so that the temperature of the water returning to the boiler is below 130°F. This ensures that the return temperatures are low enough to promote condensing, which will greatly increase the energy efficiency of the system (see Arena 2012 for more Get Price

  • Why is the boilers.idf condensing boiler curve so linear

    For all curve types PLR is always the x independent variable. When using 2 independent variables, the boiler outlet water temperature (Toutlet) is always the y independent variable. Based on that I plotted several curves, expecting to see a more-or-less typical curve for a condensing boiler which would have an inflection around ~120 F.Get Price

  • Condensing Boilers | Building America Solution Center

    Condensing boilers are the most efficient type of boilers with AFUEs of 90% to 96%. Figure 1. This gas-fired condensing boiler is installed as a direct vent appliance that receives combustion air directly from outdoors and vents combustion gases directly to the outdoors. Figure 2. Condensing boilers have primary and secondary heat exchangers.Get Price

  • GEMINOX THRI 10-50 PDF - Bio Diversity

    Oct 04, 2020 · GEMINOX THRI 10-50 PDF. Posted On October 4, 2020. THRi C CHIMNEY OR BALANCED FLUE Condensing boilers with heating only and linear modulation from to kW. THRi SEP CHIMNEY OR. THR /THR CEAR GEMINOX SA – 16, rue des Ecoles – BP 1 – SAINT-THEGONNEC (FRANCE) – Tщl: SENSORS CONNECTION THRI C. *. W FAN CABLE THRI/ …Get Price

  • Monitoring energy efficiency of condensing boilers via

    By using real-world boiler efficiency data we show that the proposed approach results in a (dynamic) nonlinear efficiency curve which gives a more complete description of …Get Price

  • Efficiency of vapour-pump-equipped condensing boilers

    Mar 01, 1996 · EFFICIENCY OF CONDENSING BOILERS WITH A VAPOUR CIRCUIT ('VAPOUR PUMP') The crucial disadvantage of an air heater is the occurrence of a phase change on the exhaust side while there is only one phase on the air side. This is why the air can only take up a small part of the energy which the exhaust gases are able to release.Get Price

  • Question about a new boiler. — Heating Help: The Wall

    mod-con there is no problem with installing a mod-con boiler in this application. these boilers are ran off of outdoor reset so this means that with the proper D.T. of 25-30 deg. these boilers will work perfect. they will only make 180 on the very coldest day of the year the rest of the time it will modulate to only what it needs. so if you have a 30 deg. D.T. and it only needs 165 to heat Get Price

  • Condensing Boilers: Maximizing Benefits | Liming

    Measure Guideline: Condensing Boilers - Control Strategies for Optimizing Performance and Comfort in Residential ApplicationsGet Price

  • Consulting - Specifying Engineer | Boiler systems

    Jun 19, 2012 · How well the condensing boilers fit within boiler systems design and operate in condensing mode depends on the return water temperature. Therefore, the design engineer should select the heat users in a way that will allow the system to …Get Price

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