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Condensing Boiler Return Water Temp Too High - Page 2

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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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  • Flow pipe hot, return cold - is this right - Page 2

    Dec 03, 2021 · The boiler turns itself off when the return water reaches a certain temp (ie TRVs are shut, water not flowing through radiators, HTW still has heat, in other words the water returning is now still Get Price

  • Expected energy saving from boiler change? - Page 2

    Aug 16, 2021 · In the first 2 years of my 2016 Baxi condensing system boiler, my average consumption was 10505kWh pa. Then I moved house so I can't continue the comparison. So you might save 4000kWh pa. Usage was for gas central heating and hot water only although hot water was also heated by solar thermal.Get Price

  • Combi boiler flow temperature with underfloor heating

    Apr 23, 2018 · It's a condensing boiler and it's designed to run on low flow temp. Let's say you set the flow temp on 55dc return will be about 45 that's a difference of 10 Kelvin. The flue gases will have about 55dc that will be hotter than the return temp and therefore gives it energy further and reduces the amount of gas usage.Get Price

  • Four Key Aspects of Hydronic Design | HPAC Engineering

    "The condensing boiler takes that initial cold, high-delta-T return-water rush in stride." "Near-condensing" refers to fan-assisted, non-condensing boilers that may offer a performance level—for example, 85 percent AFUE—with operational efficiencies only a few points lower than fully condensing equipment. Page 2 of 2. Success StoriesGet Price

  • Too much cycling | Page 2 | Terry Love Plumbing Advice

    Apr 05, 2013 · Obviously if the goal is lower return water temp to increase condensing efficiency of the boiler, this is to be avoided. But to confirm this I need a way to measure the return water via the copper pipe. The pump on the primary loop came with the boiler with instructions to run it on medium-I've already got it set on low.Get Price

  • China Borescope Inspection Camera,Pipe Crawling Robot

    Industrial Video Sewer Drain Camera Pipe Inspection. Tube Detection Camera System Suitable for video inspect the Gas pipeline, chemical pipeline,petrochemical pipeline,power station boiler header,steam turbines large shaft center hole, air separation pipeline,main steam pipeline.Get Price

  • Condensing Boiler Return Water Temp Too High - Page 2

    Condensing Boiler Return Water Temp Too High Size your emitters right, let the ODR manage the water temp, leave the pump & burner on for the season. One start per year. If it delivers. 0. SWEI Member Posts: 7,356. November 2015. I've yet to see a mod/con with a flow sensor in it (thank God) and the math doesn't lie. They alarm on excessive Get Price

  • How long does it take for your house to heat up? - Page 2

    Dec 28, 2012 · If a rad gets too much water it has a high output, BUT, the return water doesn't have all the heat taken out of it so the boiler isn't putting its rated output. On a modulating boiler it cuts down output so it's less obvious than an on/off boiler which would be short cycling.Get Price

  • Journal Reheat Article - Krueger-HVAC

    It is recognized that non condensing boilers require a high entering water (return water) temperature to avoid 'shocking' the system. This should be accomplished through three-way valves, secondary loops, or other means, not through coil selections. At part load, when the water valve is throttled, coil leaving water temperatures will ALWAYS Get Price

  • Flow versus Return Temps | Page 2 | Screwfix Community Forum

    Nov 24, 2006 · Also return temps. Low temp doesn't always cause condensing on the boiler heat exchanger. Say a boiler has a cast iron exchanger then the high heat capacity of the iron and the thickness of it results the surface getting really hot, whilst the water passing through it relatively much cooler. Hence no condensing.Get Price

  • Are we using a normal amount of gas ?? - Page 2 - Homes

    Feb 15, 2019 · Condensing boilers are more efficient at lower temperatures. I run mine at 65 degrees unless it's below freezing for a few days. That's a …Get Price

  • Benchmark 750/1000 Boiler - AERCO

    Mar 11, 2016 · Benchmark 750/1000 Boiler Installation, Operation & Maintenance Manual Page 2 of 184 AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 OMM-0082_0K 03/11/2016 Ph.: 800-526-0288 GF-130 Technical Support (Mon-Fri, 8am-5pm EST)Get Price

  • What is a condensing boiler? Why they don't condense

    Oct 31, 2011 · All rads are on, so all radiators heat up. I am wondering, until recently I have set the flow temp on the boiler to 55 degrees so I know the the return is always less than 55, heating was fine. Now it is getting cooler, the temp is too low, the radiators are not as hot it seems.Get Price

  • Choosing a reliable boiler | Page 2 | Terry Love Plumbing

    Oct 19, 2016 · At 130F average water temp the return water temp will warmer, at the edge of the condensing range, and combustion efficiency will be in the very low 90s, but the radiators will be emitting about 70 BTU per square foot (20 x 70 =1400 BTU/hr). Only at 180F average water temperature is the multiplier 170 BTU/hr per square foot EDR.Get Price

  • Lochinvar Knight MRHL Lockout - Page 2 — Heating Help: The

    Look at the graph on page 22. The ends of the graph are determined by F1,F2,F3,F4 for curve SH-1 and F1,F2,F8,F9 for SH-2. The computer in your controller calculates the correct boiler temp based on the actual outdoor temperature.Get Price

  • Advantages and disadvantages of thermal storage | Page 2

    Mar 02, 2007 · However, with indirect heating the return from the cylinder to the boiler is quite high temp as the store approaches it's 70C target which would cause a condenser to drop out of condensing for sure. The other major inefficiency is when drawing small amounts of hot water at low flow rates - the sort of thing you do when washing up leaving the Get Price

  • Lochinvar high limit manual reset - keeps locking out

    Jan 18, 2018 · When the boiler's output temperature is high (say 160F or higher), the heat being emitted by the baseboard is high, and the delta-T between the entering water temp and boiler output will be something like 15-20F, assuming "reasonable" flow rates.Get Price

  • Is A Condensing boiler with hotwater Storage tank possible

    Dec 14, 2005 · A thermal store is a tank of very hot water (rather than a boiler) (could be heated by a boiler, or electric) which works like a back to front cylinder, using coils/heat exchangers to heat either the mains water (hot water taps), or radiator circuit. SpikeBmth -, Dec 14, 2005. #27.Get Price


    With a 1,000,000 BTU appliance rated at 99.8% efficiency, using 54°F inlet water, with 70°F inlet air temperature: CO 2 % - 8.8% - High Fire 8.5% - Low Fire (at 5:1 turndown ratio) 90oF supply and 70oF return High Fire Low FIre Gross Stack Temperature 88oF 70oF GPh of condensate from boiler 10.10 .40Get Price

  • Application Guide for Common Venting Evergreen Boilers

    flue gas temperature should typically be within 20°F of the return water temperature of the boiler. If there is the potential for a wide variation in return water temperatures, the lowest possible tempera-ture should be used for any calculations. - continued on next page ™ CONDENSING GAS BOILER 220/299/300/399.Get Price

  • Limit Boiler High Setting [0SBUR3]

    Nov 10, 2021 · The unit features a High Limit Control with LED Display, easy to program Dial Settings, Boiler Water Temperature Reset and Low Water Cut Off functionality. If the high-limit temperature setting is too high, generally over 200 degrees Fahrenheit, the system pressure will reach an excess condition as well and start leaking.Get Price


    Gas-Fired Hot Water Boiler - 60 Hz. Bulletin No. 210651 . March 2018 . Supersedes July 2016. AFUE up to 83.9%. GWB. 8 - 075. E - 3. GWB8-E / Page 2 APPLICATIONS • Nine models with heating inputs of 50,000 to 299,000 Btuh • AFUE - Up to 83.9% • Easy dial-in settings for low/high temperature limits and economy settings • Installed Get Price

  • Grant Vortex Condensing Combi 26 hot water problems | Page

    Sep 19, 2014 · 2) Why are you saying that prices are rising daily when domestic heating oil is the cheapest it has been for 3 odd years? 3) How much would it cost to install an "alternative heating source" 4) Oil boilers if looked after by a component boiler engineer can last years and in many cases way longer than a gas boiler will last.Get Price

  • New CH install - couple of questions - newbie

    Dec 22, 2013 · There is also an automatic bypass valve fitted close to the boiler across the flow and return.(Honeywell DU144). Before I completed any of the above work the Condensing System boiler had a 15-20 C temperature drop across the flow and return pipes at the boiler – this varied slightly depending on how many radiator TRV's were calling for heat.Get Price

  • Matching boiler size to radiator output - Page 2 — Heating

    Feb 01, 2021 · Most of the winter, my radiators are just lukewarm, so a condensing boiler like this would run at very high efficiency. But then when you add the DHW tank, then the pump to the house has to stop, the boiler has heat up 19 gallons from lukewarm to hot in order to heat the DHW tank, and then switch back over to heating the house.Get Price

  • Condensing boilers | Page 2 | Screwfix Community Forum

    Jul 25, 2005 · Stored hot water can be at 60 deg C why would it not be, new boilers with new fast recovery cylinders can re-heat the cylinder in 15-20 mins so the boiler usually works at high capacity to satisfy the hot water, and with flows of 75 deg C you will get the cylinder to 60 deg C, as this is a short cycle it does not matter if it is in Condensing modeGet Price

  • Leaking overpressurized ancient boiler! - Page 2 - OHW

    Oct 17, 2005 · The temperature difference between the cooled gas fumes and the return water is fairly small, the fumes only contain about 20-15% of the fuel's original energy, and as the cycle goes on the return water gets hotter and hotter. When the surface temperature of the second heat exchanger exceeds 130F condensing stops entirely.Get Price

  • How To Optimize Your Condensing Boiler System For …

    How to achieve a lower than 55 degree return temp on boiler?Get Price

  • Weil Mclain Ultra II 230 Boiler - Ask Me Help Desk

    A condensing boiler likes water temperatures at about 130 degrees on the return water end If the water temperature goes higher like 160 degrees recommended for baseboard/cast iron radiators the condensing boiler will not work at top efficiency and in your case might not be worth buying since you have cast iron radiators.Get Price

  • Converting steam heat to hot water??? | Page 2 | DIY Home

    Feb 18, 2009 · I am not a boiler guy. I have fixed them but have never installed one and never did a radiant system on them. I have done several tanked water heaters with hydronic heating and it has worked well. I keep the temperature down around 100 and that seems to do well. The key is to get a large tank like a 120 gallon one.Get Price

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