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direct venting buderus

John_49
John_49 Member Posts: 16
hi my contract will install a buderus g115 oil fired boiler and direct vent it out the side of my house

was wondering if anyone had any problems with direct venting buderus with a concentric vent hood and a
riello BF3 burner.
will the cold air cause the burner to shut down or any problems like that

thanks

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Comments

  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    the only direct vent oil boiler....

    I use is the 115... The problems with the riello BF ser. burners appear to be over...I still prefer the Carlin ez1/p10 version... whatever your contractor is most comfortable with...However I would NEVER use the concentric vent set up again... period. I only use the Aerocowl hood and the seperate Fields hood...I can almost gaurantee a problem w/ cross contamination...one of the reps for Buderus does not even reccommend the concentric set up...the seperate hood might not look as nice but it will work better if directions are followed . Also if possible install it on the leaward side of the building...kpc

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  • John_49
    John_49 Member Posts: 16
    hi keven

    what do you mean leaward side of the building and contractor said he was installing concentric
    hope he can change it for me
    what if i power vent it insted
    thanks
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    Leaward...means

    south side away from direct wind...go with the seperate vents. The show both in the literature....I don't use power venters either...too many things to go wrong and they are loud....kpc

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  • John_49
    John_49 Member Posts: 16


    i just looked down stairs. and at the install manual i dont have the room for 2 vent hoods looks like i have to use concentric vent hood. what dose cross contamination do. is that when the soot and intake air come into the burner together and cause burner failer

    oh also looks like more dam bad news for me my vent would be directed north theres a house 40 ft away

    thanks

  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    It it a walk out ...

    basement? With a ton of room around it?kpc

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  • Mellow_2
    Mellow_2 Member Posts: 204
    what???

    Sounds like an opinion. Why would they make something that don't work. Consentric venting will work. The only differance is in how it draws in fresh air. I hate to see someone get scared about installing ANYTHING just because of someones opinion. If concentric gave them a problem then so be it. Most people who make the designs for the boilers know more than most installers (sad but true). Trust your installer that you chose. DO NOT LISTEN TO STRANGERS FIND OUT WHY THEY DON'T LIKE SOMETHING....you will be glad you did. If it sounds too good to be true it is............Well if it sounds like an opinion it is.. GET THE FACTS YOU WILL BE HAPPY YOU DID. Most things are made to work!!!!......... OPINION---- A belief that is not based on what is certain but on what one thinks to be true or likely. Most people are good, but just alittle stubborn.
  • Constantin
    Constantin Member Posts: 3,796
    trouble with concentric vents...

    ...I experienced all sorts of wonderful and whacky behavior when it came to concentric venting of a non-power-vented outdoor gas water heater I was designing/testing/creating. To get it right, over two months of trials, tribulations, etc. were invested, along with a wind machine and movable "walls" to ensure the heater would work fine no matter what kind of wind struck it in whatever installation scenario we could think of.

    Even tiny differences between hole locations, positions, etc. would make a huge difference WRT to CO and other emissions. I'd like to think I can now recognize a vent terminal that incorporates critical design principles.

    For whatever reason, most manufacturers of blower-vented equipment do not appear to see the need for inherently balanced concentric vent terminal designs. Perhaps the idea is that the blower will take care of any ΔP imbalance... not in my book, but what do I know.

    Having separate vents will not necessarily spare you either, IMHO. Anytime a big gust creates a ΔP across the two vents, you'll potentially have backdrafting, etc.
  • Constantin
    Constantin Member Posts: 3,796
    I'm not sure that was warranted...

    John, you make some valid points. Nonetheless, I do not think it is necessary to be as negative as you are in your posting. After all, folks come here for facts and opinions.

    For example, I could throw out the names of several products like Asbestos, Thalidomide (sp?), CompleteHeap™, Entran-tubing, etc. that meet the specification of a product with such ongoing issues that the manufacturers had to withdraw them from the market. Engineers designing these products are just as fallible as the folks manufacturing, shipping, marketing, and installing them.

    Lastly, perhaps you can add relevant information about the kinds of concentric vent installs you have done, what you learned, and what you can pass on about minimizing install issues for those who are following in your footsteps.
  • kevin coppinger_4
    kevin coppinger_4 Member Posts: 2,124
    true....

    the info I gave is my opinon...from my experinces and from talking with the mfg. reps, from Carlin, Beckett, Buderus, and other boiler mfg. reps...I want to help out the homeowner from going through the problems I have run into and worked through...I not tring to scare anyone...just give them info. to make an informed choice...kpc

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  • dave connors
    dave connors Member Posts: 30
    Direct Venting

    If you have a concern you can also contact us here at Buderus for an opinion. 1-800-BUDERUS
  • Joe@buderus
    Joe@buderus Member Posts: 165


    Buderus offers two direct vent terminations. The FT4 (made by Fields) which is a concentric termination requires a single penetration through the wall. Because the fresh air is drawn in over the exhaust gases, there is a possiblity that exhaust gases are being drawn in (or prevailing wind pushing the gases in) and altering the flame color just enough for the cad cell to loose the flame causing a burner lockout.

    The AT 4 (made by Aerocowel) requires two penetrations and are four feet away HORIZONTALLY (per instruction manual) there is less chance for cross contamination.

    Cross contanimation has occured both with the Riello and Carlin burners.

    Please feel free to contact Buderus if there are any questions.
  • John_49
    John_49 Member Posts: 16


    LOOKS LIKE IM SCREWED i called jake today at buderus and explaind to him my problem. my vent would be faceing north west and he said thats the direction most perfailing winds come from. i cant move the boiler anyware else.

    would it be ok if i used a power vent insted of direct vent this way the burner will not get any back draft.

    my basement has enough cumbustion air to supply the burner
    what do you all think. would that work better in my case.
  • dave connors
    dave connors Member Posts: 30
    You will still have issues

    Prevailing winds may still give you issues. Maintenance on a power vent is critical.
  • John_49
    John_49 Member Posts: 16


    how is this for a solution can i plant bushes in front maby 2 feet away from the turmantion around it. would that solve my problem and make it look nice. added bonus :-)

    thanks
  • Joe@buderus
    Joe@buderus Member Posts: 165


    Planting bushes around the termination may prevent flu gases from being dispersed. A power vent is a mechanical means to vent. It is a mechanical device. I would suggest consulting with the contractor and power vent manufacture for their input.

    The prefered means of venting a boiler is through a chimney. The draft produce by the chimney is a natural occurrence.

    The possibility exsist for cross contanimation. There is also the possibility of an odor smell because of venting close to ground level. If the FT4 termination is installed and contanimation does occur, a fresh air intake can be added to help resolve the issue.
  • John_49
    John_49 Member Posts: 16


    so are you saying that eaven if i plant srubs in front of the concentic vent that i will still have problems with cross contamantion and back drafting. what if i made a lattus fence around it. insted or maby buy 2.5ton condencing unit and put it a foot in fron of it im going to install A/C next year anyway will that work or will the flue gases be bad for the A/C unit

    thanks
  • Mellow_2
    Mellow_2 Member Posts: 204
    Didn't think I sounded negative

    I was just trying to point out that none of us here has seen the job and his installer has been there before. I think the wall can give advice with out dumping on someones job layout. The wall should give opinions but should not make it sound like fact. I have seen jobs that the custimers thought were hopeless and just needed a small adjustment to fix them. If we as a trade follw the instructions from the start and talk with the reps, most all products will work properly. The people who make the products Know how to make them work right. Most of the time the products are not used correctly and that is why they do not work. The best info I can give is follow the instructions closely and trust your installer. Ask questions of why he chose that kind of vent? If he can respond to your sadisfaction then get some one who can.I think the wall has good info to give but I mostly see opinions that could be as bad as my spelling....Maybe I will post some pics of jobs when I feel less positive. live happy........
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