Munchkin venting questions

Pinball

Thanks Guys,
Sorry I did'nt leave a message, I was at the site and phone service was limited at best. By the time I got home this was the best way to get a hold of you. You Both have always been there!Any time I had a question And I did'nt mean to sound like you were'nt.(apoligies to all @ Munchkinland)
So back to the question. On long runs, useing 4", I should terminate with seperate 4" and NOT use a concentric kits.
Thank You!

Pinball

when venting a Munchkin boiler, for long runs they say to increase the pvc to 4". If the run is too long it will de-rate the output of the boiler. Now the question, What difference does it make increasing the vent to 4", when a concentric kit is only 2"? doesn't that in itself derate it? or are concentric kits only for 3" vents?
Also, we are venting 2 199's through the roof (3 storys).
In the same area, there is a propane fireplace class B chimney
what if any are the vertical and lateral clearances from the class B? MFG, or code?
I have had no luck calling HTP lately they been real busy
and I need an answer soon since this could hold up the builders as well.
Thanks

AL

hr

I've yet to find a

4" concentric vent kit. On those larger jobs we just run seperate 4" vent and combustion air to the units.

I would guess the 1" to combustiables for B vent would still apply to PVC?

hot rod

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Pinball

Hot Rod,
What I was refering to, was the possibility of the munchkins aspirating the exhaust from the fireplace. (the intake sucking in the class B exaust.) and causing problems for the burners.
Thanks

Al

Guy_6

Venting

I believe that I still qualify to throw in my knowledge here:
Whenever you increase a vent size, you must continue that size all the way to the termination. Think of Cape Cod traffic-4 lanes of highway to a 2 lane bridge. It all backs up to a 2 lane flow. Actually worse due to merging lanes.
If you are going to a 4" vent, terminate with 4' and a seperate 4" intake.

As for clearances- use common sense: How close to the other vents would YOU SIT for an hour?

Fax a rough sketch to the folks at HTP (508-763-4909) and they will get back to you with their thoughts on the clearances.

Oh, the old days......

GW

Chuck Shaw_4

Al,

Munchkin requires a minimum of 4'from any other exhaust or intake, window or other chimney. Page 16, section 4-B-8 of the installation manual. We also require you to be at least one foot above any expected snow level, Page 16 section 4-B-4.

When reducing from 4" to use a concentric vent kit, instead of being 3 equivalent feet, it now becomes 10 equivalent feet to make up for the difference, this way the deration is taken into account. I personally detest this method, but that is what has come from across the street (engineering). My personal recommendation would be a separate exhaust and intake. That way there is no restriction

If you called and we were busy, you could have left a message on anyone of the tech support phones. I was on vacation last week, and Jeff will be on vacation the end of this week.

We are also in the process of training new people.

I do my best to get back to people when they leave a message for me at my extension, or at the tech support general mail box.

I hope this answers you question.

Chuck Shaw

Tech Support Department

Heat Transfer Products

hr

Even though I dislike concentrics

I'm not sure why someone has not built a 4" kit yet?

Looking at a 6" PVC Wye, it should be easy to fab one, not unlike a 3". And I think it could be done without the small restriction seen in the 3" kits.

I saw an ad for PVC caps for vertical 1 pipe installation. Claim to have CSA approval. www.ecapvent.com

hot rod

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Chuck Shaw_4

I would prefer

to see them separate.

However, buy counting the concentric kit as 10 feet, you can use it if you wish. You may also want to look into exhausto systems.

I agree with Hot Rod, I don't know why a 4 inch kit isn't available. When we asked, we were told the demand was not great enough to justify the cost of producing the "y".

Chuck

Firedragon_4

Try this,

http://www.nythermal.com/Media/Docs/Pdfs/TrinityTiInstallationManual.pdf

See pages 5, 6 and 7.

Just got back from the factory in Canada, amazing and a class act company, FACT! I start training for them next week on the whole line.

[Deleted User]

Guy........... what you be a doin?

Have wondered what you have been doing with yerself since leaving htp.

John

Guy_6

Working

It's good to hear from you, John.
I am selling Smith commercial boilers- actually working for Mestek. I had thoroughly enjoyed my time at HTP, but I needed to move on, and Mestek took me in. I will e-mail you directly to fill you in further.

Guy