How To Install a Hot Water Plate Heat Exchanger For An Outdoor Wood Boiler
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- เผยแพร่เมื่อ 26 เม.ย. 2023
- Using an outdoor wood boiler to heat our hot water is one of the best decisions we have ever made. We now have endless hot water and it costs us pennies to use. Today we are replacing our old plate heat exchanger with a new one as we also move and install a new water heater.
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Retired HVACR technician here and it’s amazing how these units can be such a small package and work so well .
It's amazing that such a small exchanger can bring the temp up that much.
I was given a tip buy a plumber years ago when it came to threaded fittings and it has saved me a lot of aggravation over the years. And it was to do a wrap of Teflon and then cover the fitting in pipe dope and put the fitting together it had saved me so much aggravation with over tightening and leaky fittings
Great job! I am trading out my old Taylor for a Earth boiler. I will be adding these to my to hot water tanks.
Looked at a few houses with a wood boiler. Thanks for the video on how to increase efficiency.
Thanks for the lesson,enjoyed
do you have other videos where you show the wood stove and how it connects with the exchanger
I'm wondering what happens when your tank reaches it max temperature. How do you stop it from boiling the water.
would love to do something like this but scared it would boil and explode
Amen! I have a wood burner in the house next to a oil boiler . I even roughed in a way to connect something to "extract" the heat. that was 25 years ago. I just need to add that heat exchanger and I will move my electric hot water tank. thanks
Get rid of your ELECTRIC water heater. The electric is a bad way to go.
Other than non-boiler season needs, another reason to keep the water heater piped in is for the anode to remove odors. I use the same anode as you based on your recommendation. Great channel, been a subscriber for years.
Great vid 👍
You can throw these on your vehicle using the coolant lines before the radiator with a 12v pump and it makes a pretty banging outdoor heated shower or hot tub filler. Just remember to put a bypass and a thermostatic mixing valve on there so you don’t burn the crap out do yourself! 😂
50 degree inlet water to 125 degree outlet water on a 30 plate at around 3 gallons per minute (above average shower flow). With a 60 plate you can pull 195 degree water out if you’re into that kind of thing! 😂
Like your use of copper plumbing, that's all I know.
I connected the top and bottom of my water heater with a 1" copper pipe as a water jacket and run a 3/4 " copper pipe inside of that for woodburner water to flow through. The system gravity flows through the water heater.
Do you have a recirculating pump in the circuit to keep the water in the tank hot or is this only to preheat the cold water?
Is there anything you can't do??? You're wife is a lucky woman to have a husband with so many skills on top of being a good guy. Thanks for all the great info you share.
Not sure if it's the same but Pex-al-Pex looks a lot like and seems to be made similar to Kitec which is recalled due to failures surrounding high pressure or high temperature applications. The pipe breaks down around the fittings.
Do you have any trouble with hardwater deposits on the exchanger?
awesome video, is the water storage heater running i.e connected to electric, do you have a circ pump running off the tank or just gravity fed?
So is this like a modifed indirect system? Do you need an electric water heater to do this or can you use an indirect tank?
I have had mine since 2008. Water is hot the more hot water you use the hotter it gets just opposite of electric or propane hot water heaters. I have checked mine at 130 to 140 degrees thats a real common number. I fill my boiler with soft water and rust prohibitor it has never clogged or caused trouble. I drain and replace water annually.
No idea why i watched this but it was very satisfying
Just as a note for anyone wanting to replicate he that's a bit too much solder and the Teflon tape at 1:54 is put on the wrong direction
I’d get rid of the kitec (pex-Al-pex) it was recalled some years ago
Thank you for the vid. I was sold side arm heat exchangers which from what i read are not great and my hvac guy didn't like either. So my thought was a plate exchanger to put on maybe this summer. Do you not need a mixing valve because temperature wise the water heater only takes the water as hot as it wants and won't be too hot?
The hot water is actually too hot and could probably hurt someone. I should have installed a mixing valve for safety but as long as an elder person doesn’t fall down in the shower and hot water on full blast we should be good:)
I put a 55k tube an shell exchanger on my domestic cold in and a side arm on the hot water tank works very good although a 110 k tube an shell would be better for actual constant hot water but the set up works good all in all
Is that gas fitting tape your using for water plumbing ?
Do you have any mixing valves in your system. I was told they are necessary to control water temps in under floor heating systems and so that cold water is not being returned to the boiler. What has been your experience, my system is now starting its eighteenth season. (old CB 6048) virtually trouble free
I have no mixing valves. Although I should have installed on on the hot water supply because the boiler heats the water up over 150 degrees which is too hot and could burn someone if we aren’t careful
Why would you heat the water before the house?
I assume that you have your hot water heater connected normally as well so you don't have to run the wood boiler in the summer?
Correct
Are these plate heat exchangers ok with the “hot” side being glycol? Thinking of solar heated glycol… instead of using a heat exchanger tank which I’m guessing is substantially more money.
I would think so, there is no exchange between the two loops. Now I suppose if something failed it wouldn’t be good if the glycol got into your hot water
Could you put a link someplace to where I could look into purchasing one of these Heat exchangers?, I'd like to know how to size these things besides number of plates like how many gallons it will heat or something like that?
How many sq feet would this heat in a house?
Would it matter if you had the hot water from the wood boiler going in the top and coming out the bottom?
Not really, they say it is better going the opposite direction as the fresh water flow but it can’t make that mush difference
How long did your old one last I didn't quit shut in the video
👍❤😇🙏
How long does the water in the tank stay hot? Let's say you don't consume hot water for 12 hours,what temp is the water in the tank then,aka how hot is your domestic hot water then
There is a natural convection cycle in the water keeping it hot no matter how long you don’t use it
@SSLFamilyDad interesting,i didn't know that. Will order one of those exchangers and give it a go. Atm i have a old double pipe exchanger but that doesnt keep up at all.
You put your Teflon tape on backwards
i dont get this. surely this way the unused heat has nowhere to go which could cause boiling and extremely high pressure, unless the hot water is circulated to a radiator after the heat exchanger.
7:57 here you can see it best, so I'll tag that timestamp. Why didn't you just go straight ahead with the lower (hot) water orange tube (pexalpex?) I know you said it's hard to bend etc., but now you have a ninety, a short section going up, then another ninety, then a 'flowy' bend, where it looks like you could have gone just straight ahead from the wall with maybe a tiny bend upwards?
You're always removing funky doodads from other people's installs as we've seen in the past, so why did you add one here? 🤔
I see what you are saying. The reason is because it would have needed a 1” pex-Al-pex coupler which I did not have not want to buy for $50 I might have one extra when I tear out some other stuff in the crawl space and could switch it out down the road. My final solution for this will be to dig it all up and switch to better insulated pex
Right off the bat - those bell reducers should have been BRASS.
Same with the water heater nipples!
Galvanic action is hastened by joining copper to copper with hot-dipped galvanized steel. Oops!
No such thing as unlimited hot water since the tank refills with cold water as you draw off the hot water just saying
With this setup the tank refills with hot water. As the cold water passes through the heat exchanger it is instantly heated to 140-150 degrees.
N@@SSLFamilyDad
Does the exchanger radiate a lot of ambient heat into the air?
It is hot to the touch, so yes it does radiant a little heat