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I checked the Dwyer Instruments, Inc. WEB site, - they are specializing mostly in flow control & other related categories. I didn't see any fans on their site. Maybe they can refer me to proper...

Hmm... after I posted I found That Greenheck actually makes one for Lab ventilation purposes, BTW, this is a link. Anything else I missed?

Gosh, this is devastating all the way from 3000 to 2000 CFM and u still insist to further attenuate the run by putting (2) 90degrees elbows, hence further increasing resistance?

First of all, my sincere apologies if you sensed or felt that I was rude toward you; nothing of that sort of behavior was intended. Secondly, in my current design it will never happen because WHF fan...

Very smart and sensible suggestion, indeed. The real question is, - are they produced / manufactured here in USA / Japan or Europe? So far, I saw only constant speed varieties from guys like Soler /...

TIA and there u go, hopefully it will give u some ideas, this is FKD-16 variety

It just dawned on me that my 3000 cfm inline blower may not be powerful enough to pull air out through newly built ventilation network for 6-8 rooms. This is way over my head and I am afraid that I...

Anybody cares to share how the above stack against Soler & Palau or Fantech equivalent models? It i defineteely much quiter, at least accoding to published specs, - less than 2.5 sones. What about...

Right now I'm trying to figure out how much of sidewall or ceiling exhaust fan I need in order to deal with both issues, - heat build-up under the sloped ceiling and remaining kitchen odors which...

I don't need to oversize individual rooms, right. CanI go with regular specs? With the exception of running sound proof flex line last 6 feet to the register?

Thanks, much appreciated

5 @ 70x25 and 3 @ 88x25 plus 2 huge skylights, I belive 48x24 each

Sorry for bothering you with this stupid question, should have thought about that before asking as there is no mathemetical correlation and 2 12' pipes won't be even close to what I need. I guess, I...

There are people upstairs so I won't do that.



And how much will it cost to replace regular huge double pains with low-e glass? And what will be the benefit? Any idea?

Can I split the main trunk in 2 trunks of 12" each and distribute evenly the rest of space between them? I realise that I still have to do 90 bends. TIA

We are talking about whole wall (floor to ceiling) made out of huge 20 year old picture windows plus 2 huge skylights.



Maybe, I am not ready to answer one way or another.



...

There was another reason for additional more powerful sidewall exhaust fan under the kitchen ceiling, I was hoping that it will deal not only with build up heat during summer but also will get rid...

I remember reading about that effect somewhere but I could be wrong.



That is the worst case scenario and I may have overshot quite a bit. I would say that on average it wil be less than...

I can't say for sure because, first of all I have pretty much open floor layout and secondly very ineffective current downdraft vent despite its well known name. It has the blower inside kitchen...

Kevin, I painfully realize this and, as a matter of fact, I start looking @ ERV solution long time ago.

Aren't we presumptuous again??!! You have no clue who I am and what my connections and capabilities are. Despite the fact that you are in a business, I can probably buy everything that you buy and...

Is there something wrong? Could you elaborate?

And how did you figure that out?

Ok, thanks Kevin. I'm done with this garbage

Hmm..what fan are you talking about? What about noise level?

You should not expect from replacement board rhe same layout, call Robertshaw tech.line

Try this one from Jonstone Supply. Should be direct replacement

Can u wait 1-2 days?

What's the part number for it? Can u get it?

If u have tank, I would immediately replace it with Rinnai tankless water heater

It is true but it is the Genie that greedy Wall Street let out of the bottle by pushing our manufacturing might to China.

After looking more carefully into central point installation, cost and headaches involved with this method are increasing exponentially every day. At this point I'm back @ crossroad.

I guess the idea of installing cheap Soleus MS is out of the window, somebody suggested Mitsubishi and it appears to be great choice

What do you mean?



Kitchen pop-up hood, pushing out 600-800 CFM but I am also considering sidewall mount general exhaust close to 1200-1500 CFM



Are you talking about something like this...

Thanks, Kevin. So you called it POS (though I generally agree that anything coming from China is Garbage) due to the fact that parts are difficult ro get?

Yeep, please check it out here

So, if I have to address this issue for my 1-st floor, what would be the most effective and sensible approach?

1. Tying it into the central air distribution system with inlet on the side of the...

Hmm..assembled in China with Sanyo compressor. Any takers?

Seriously, I think the units like that are totally useless and complete waste of money and I know that there is, at least one more company which makes similar type of product.

Ok, I gave in and after careful consideration I decided to install in my kitchen cheap Soleus KFTHP09 mini split and at the same time bring return line. Originally, I was planning to install...

Thanks again for the words of professional wisdom. I am wondering if I can step down to 24" round because that is the largest diameter available in flex pipe, everything else above is custom sizes....

I wonder anybody knows anything about this system, except specs? Reliability, country of origin?

Thanks for the vote of confidence but so far we are in overwhelming minority

With your credentials, I have to take your opinion as a gospel or how it is defined in math as a lemma, however with all due respect I have to ask you this:

1. First of all, are you talking about...

Hmm..looks really promising and almost exactly what the doctor ordered. Will give them a call on Monday. Thanks a lot.

Wow!! It never even occurred to me as I was totally focused on a MS as a cooling unit and not an axillary fan during winter time. I guess, the only question is how far I can push this air because the...

Because I do not believe in this solution as it implies that there is 1 (One!!) central location from where it is pulling all air. They are not powerful enuf and what happens when all bedrooms doors...

No, I do not have the fan yet and I am only passing the information I got from tech support. I'm talking about FKD-16 variety

Thanks, Chris..so what do I do with 70db motor noise?? That is hell of a lot of noise near bedrooms and with these levels I can wake up all my neighbors. It is friggin loud

Tim, thanks for the suggestions. So forget silencers? I did mention that I am planning to oversize my ducts, what about using flex vs regular pipe? I really need to find a solution for the fan noise....