Vitodens Question...............Cosmo

If I get time tomorrow I'll remove the outer portion of my Vitodens flue slide coupling, thus drawing combustion air from the indoors while still exhausting out. It's an elbow and about 1' of pipe away from the boiler outlet. I'll run on test mode (full output) and give my subjective assessment of any change in sound.

At present, the Vitodens (even at full output) is significantly quieter than the atmospheric traditional cast iron boiler it replaced. I cannot hear it at any time in the room above. Other than relay clicks and the initial air purge I have to get rather close (in the basement) to hear anything. The built-in circulator is eerily quiet--it has to be operating at near max RPM to hear anything.

Cosmo

Fresh air,,,


It depends. The fan shouldn't be anything the homeowners will notice. Make sure to hang the architect right beside the circulator pipes;-) Use unistrut & rubber isolation clamps. They will still hear the Hmmmmmmm of the Circs but it wil not be as bad as it could be. The Vito will be nearly silent.

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I

> I have a job I am bidding, looks like I won't be

> able to install the side wall concentric vent

> system, instead I will be forced to vent up a 40'

> chimney w/ Stainless steel single wall. In this

> configuration the boiler will suck combustion air

> in from the mechanical room. Obviously there

> would be a fan to bring in fresh air.

>

> My

> question is how much louder will it be? Noise

> will be an issue, as in the architect's infinite

> wisdom the mechanical room is exactly below the

> master bedroom!!!

>

> Cosmo Valavanis

Cosmo:

Definitely a change in sound--especially during the initial air purge. I can always hear air rushing when it's operating at full output. Not sure if the sound increased so much as it changed character. Most certainly higher in pitch. Honestly still not as loud as the power supply cooling fan in my Partner™ voice mail system which has a definite whine.

I turned off everything that made any noise and strained to hear the boiler in the room directly above. Boiler is mounted on the old chimney--fireplace in the room above. Downstairs floor is very thick: 1" cypress; 3/4" yellow pine; 5/8" red oak. I might have heard something, but I'm genuinely not sure. Quiet outside right now as the University is out on summer break and there's very little traffic. Not sure if I was hearing faint "background noise" or the boiler. Whatever I heard--again straining to hear anything--was neither distracting nor annoying in the least. The old boiler is still significantly louder.

Again, the only mechanical sound I've ever heard from the entire system is relays clicking unless I press my ear against the case--and even that is faint, and low pitched without any trace of a whine. I use only the built-in circulator and the TRVs are absolutely silent--there used to be some TRV noise in certain circumstances with the B&G 100 and I could definitely hear it run from upstairs.

As long as you have no pumping noises or resonances, I would say any complaints regarding "noise" from the boiler itself in the room above are overly picky.

You're welcome. I wouldn't make any issue of "noise". If you do they might strain to hear something...

For insurance you might use fiberglass insulation as well some sort of finished ceiling in the mechanical room.