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Posted by dantheman on October 23, 2006, 12:42 pm
Noon-Air wrote:
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> The only decision you gotta make is do your want it done? or do you want it
> done right?? Call you favorite local HVAC professional.
>From my experience, an HRV or ERV is something that can quite easily be
installed "right" yourself. I know, because I just did it recently.
And it works fantastically.
The big plus is a company who is willing to provide some good
service... I was lucky that the unit I bought is made by one of those
companies (Venmar).
For one, the instructions provided cover a wide variety of applications
and methods and quite detailed. Also, I made two calls for advice on
the "best" method in two situations I came across and they not only
listened to me (a non-professional) but fully answered my questions and
gave me the information that I needed (these were situations where
there was a couple of options in the installation manual but obviously
one was best for my situation).
Some companies won't even sell their product to DIYs, let alone answer
technical questions.
And you can take extra time and tape the joints and cuts real
nice--something I rarely see in "professional" work...
Peace, Dan
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Posted by bob smith on October 23, 2006, 2:10 pm
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>> Do single room, quiet (<30dB) HRV units exist in North America?
>> I have a single finished room in my basement that requires fresh air
>> ventilation. My house has no existing ductwork (hot water heated, no
>> central air). I seems outrageously expensive to install a whole house HRV
>> with ductwork to the room.
>> I notice in the UK there are many examples of equipment like this, for
>> example:
>> http://www.vent-axia.com/awwebstore/products/vacas/hr25.asp
>> http://www.vent-axia.com/awwebstore/products/vacas/hr100s.asp
>> Is anyone aware of a solution available here? I'd prefer a non-window
>> based unit since I dont want to block the only window in the room with
>> the HRV.
> There are lots of HRVs and ERVs out there..... Google is your friend.
I have found many HRVs and ERVs, but no "single-room" type units like I
described
above in North America.
show/hide quoted text
> The only decision you gotta make is do your want it done? or do you want
> it done right?? Call you favorite local HVAC professional.
I have called many local guys who have never heard of any such thing as
I am describing above. However, like many things in life, the amount of
available options
is usually much greater than what the local guys are selling.
With regards to getting it installed, I cant imagine a single-room, through
the wall unit would
require any particular expertise to install, so I would install that myself.
However, for a complicated
ducted scenario I would obviously get it installed. The problem is that the
latter scenario is way
overpriced for my needs to service a single room.
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>
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Posted by dantheman on October 24, 2006, 12:43 pm
bob smith wrote:
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> However, for a complicated
> ducted scenario I would obviously get it installed.
Seriously bob, there is absolutely nothing complicated about installing
a whole-house HRV into ductwork. The only real decision is where to
locate the return for the HRV (the supply goes into the return duct for
the furnace). In fact, one approved method is to take the return for
the HRV from the return of the furnace too--only it has to be at least
3ft. before the point where you connect the supply from the HRV back
into the return of the furnace. This way you do all the connections
right at the unit and return plenum for the furnace (both located in
the same area I assume).
The rest is the same as you describe for single-room ie. you have to
make a big hole in the outside wall for the outside in/out (can be in
one pipe called a "tandem" or similar).
The only tough part is cutting the 2 holes in the ductwork nice.
Peace, Dan
The problem is that the
show/hide quoted text
> latter scenario is way
> overpriced for my needs to service a single room.
>
>
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Posted by bob smith on October 24, 2006, 4:44 pm
> bob smith wrote:
>> However, for a complicated
>> ducted scenario I would obviously get it installed.
> Seriously bob, there is absolutely nothing complicated about installing
> a whole-house HRV into ductwork. The only real decision is where to
> locate the return for the HRV (the supply goes into the return duct for
> the furnace). In fact, one approved method is to take the return for
> the HRV from the return of the furnace too--only it has to be at least
> 3ft. before the point where you connect the supply from the HRV back
> into the return of the furnace. This way you do all the connections
> right at the unit and return plenum for the furnace (both located in
> the same area I assume).
> The rest is the same as you describe for single-room ie. you have to
> make a big hole in the outside wall for the outside in/out (can be in
> one pipe called a "tandem" or similar).
> The only tough part is cutting the 2 holes in the ductwork nice.
> Peace, Dan
Hi Dan,
The issue is that I have no existing ductwork in the house so a ducted
solution will
require running all the necessary ducting. Fine, thats not too complicated.
Next issue is finding suitable holes for the outside supply and return
vents. Its a bit
tricky in my situations but I might be able to do it. Also two holes to
drill instead of
one.
No, its not too bad, but I would be tempted to get it installed anyways in
this situation
whereas the single-room unit I would not.
Nevertheless, it seems stunningly clear to me at this point that the answer
to my original
question is "No, these units do not exist in North America". It would have
been nice to
receive that answer but I suppose Usenet beggars cant be choosers :-)
Thanks anyways for all of your advise. It has been informative and has
gotten me thinking
a little bit!
show/hide quoted text
> The problem is that the
>> latter scenario is way
>> overpriced for my needs to service a single room.
>
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Posted by dantheman on October 25, 2006, 8:36 am
bob smith wrote:
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> Thanks anyways for all of your advise. It has been informative and has
> gotten me thinking
> a little bit!
Ooops--I forgot that you have no forced-air system/ducting. I'm
curious why you need two holes to the outside? There are attactments
you can buy (from the HVAC supply place--although you'll pay 3x the
cost for them) where you hook up both the in and out into one pipe and
it is split on the outside end (and only one end-cap/cover).
Anyway, sounds like an opportunity for importing the European stuff
here!
Peace, Dan
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> done right?? Call you favorite local HVAC professional.
>From my experience, an HRV or ERV is something that can quite easily be