How a Condensing Boiler Works

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Күн бұрын

We’ll explain how condensing boilers or condensing heaters work and their residential and commercial applications. Why are condensing boilers more efficient than the standard non-condensing boilers?
We’ll explain what you should think about before adding a condensing boiler to your home or commercial property.
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Пікірлер: 31

@ponchow6618 2 ай бұрын

Explained nice and clear. Thank you.

@MEPAcademy 2 ай бұрын

Glad it was helpful!

@GB19751 Жыл бұрын

Good theory explanation. Here in Europe we have metric so I don't understand US temp measurements so cant relate to what is cold .

@GB19751 Жыл бұрын

Do you want join EU?

@MEPAcademy Жыл бұрын

Sorry Graham, but we are starting to incorporate metric in future videos.

@Dicofol1 Жыл бұрын

I didn't understand the latent heat section, can you elaborate more ? Is the 970 Btu/Lb universal or only for Natural Gas fuel burners ?

@MEPAcademy Жыл бұрын

That's the latent heat of evaporation for water, which is universal. See our video on What a BTU is, that will make it clear as to where the 970 Btu/lb comes from.

@Iama_Gem 2 күн бұрын

Thank you❤

@MEPAcademy Күн бұрын

You're welcome 😊

@julianhowarth1075 Жыл бұрын

So essentially a condensing boiler harnesses the waste exhaust heat to preheat the incoming cold water. This results in less energy needed to heat the water to any given temperature. This process results in condensation (condensate) water, and its disposal ?. 1, Why is the condensate water considered acidic by this process ?. 2, How does a non condensing boiler deal with condensate water which is not captured and disposed of, albeit less efficient ?.

@MEPAcademy Жыл бұрын

1) The PH level of the condensate is on the acidic side so it needs to be treated. 2) A Non-condensing boiler should not have any condensation with proper design. If the non-condensing boiler has condensate then it will corrode the heat exchanger, which does happen.

@Stealfos 10 ай бұрын

The condensate is acidic because of a chemical reaction by the heat of the gas burned.

@nickhickson8738 6 ай бұрын

Combustion products of burning gas I suppose. CO2 dissolved in water forming Carbonic Acid is acidic.

@SayWhaaaaaaaaaaaaaaaaaaaaaaat 8 ай бұрын

Usually condensing boilers is efficient at about 85% AT BEST. All boilers is configured in such way that they are NOT efficient. Also lot of people uses them inefficient. To get efficiency you MUST not exceed flow temp of 50c. and as much cold return flow as possible. There should NOT be visible 'smoke' coming from flue. MOST people think if they see 'smoke' (it's just water vapor) coming from flue it means it's in condensing mode. it's INCORRECT. If you see white 'smoke' coming from flue this means you are NOT getting high efficiency your condensation happens OUTSIDE the boiler, because it jut too hot inside to create droplets. Most people uses condensing boilers at VERY high setting like 60c flow temp at which no condensation is happening and boiler efficiency is the same as standard boiler's. You have to use as low temp as possible to get NEAR the specified efficiency. Your video also have this problem you only talk about RETURN flow temp, while flow temp is important too. The higher flow temp -the less surface of cold area the less condensate. So flow temp is as much important as return temp. Also most important efficiency requirement is - outside temp sensor attached to boiler and the best would be to have room thermostat too, so boiler could use both data and choose optimal flow temp.

@MEPAcademy 8 ай бұрын

Thanks for the comment.

@Jimbo878 8 ай бұрын

is carbon monoxide present in the condensation outflow pipe?

@MEPAcademy 8 ай бұрын

Small amounts of carbon monoxide are exhausted, while the condensate is acidic and should be treated before being sent to the drain.

@Jimbo878 8 ай бұрын

@@MEPAcademy appreciate your reply

@johnf3326 Жыл бұрын

So why does my condensing boiler flue 'plume' even with flow temp set to 50c?

@MEPAcademy Жыл бұрын

John its best to have an experienced boiler technician look for the reason as it's not easily diagnosed from your description. Was this during a high relative humidity day? Is the forced draft fan spinning faster than it should, blowing out the condensate instead of it draining? Is the drain line clogged? There are many things to look at, and anytime there is a burning fuel involved it needs the attention of an experienced technician.

@fionnan2811 6 ай бұрын

It might have to be flow speed adjusted to get the 22°c between the flow and return

@leonperry123 Жыл бұрын

Need a video on how to actually reduce the return temperature.

@MEPAcademy Жыл бұрын

Thanks for the suggestion.

@adobo6905 Жыл бұрын

You need to redesign or modify your existing heating coils/ radiators (add more heat ejection surface)

@MEPAcademy Жыл бұрын

@@adobo6905 Thanks for the suggestion.

@SayWhaaaaaaaaaaaaaaaaaaaaaaat 8 ай бұрын

It's VERY easy. the slower the pump -the colder return. so just reduce the pump speed. Also flow temp is as much important as a return. Because of the higher the flow temp -the less cold area the more heated area the colder return have to be to create condensate. This video bit misleading because boilers have water in coils, it's much less area than in this video. So heat spreads a lot to a colder area too, leaving tiny area to condensate to.

@SeosamhMacUaid Ай бұрын

@@SayWhaaaaaaaaaaaaaaaaaaaaaaat what is the idea return temperature?