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
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.
Those links look really interesting... but FYI, the Venmar units that
are very common up here where I am have optional instructions of
installation that do not use ductwork--you simply put the return at the
higher level of the home and the supply at the bottom (ie. basement)
from the HRV (using flex. duct) and it's "proper". Very easy to
install--I did one myself (though I used a separate return but fed the
supply into the ductwork). Why not put the return upstairs (you can
use the space between two studs in the wall as a "duct") and ventilate
the whole house? It wouldn't cost any more--save for some extra flex.
duct to the wall and a cap for the wall exterier upstairs...
The problem with not using ductwork is that the unit would have to be in the
Fine for a small quiet unit like the links I gave but for Venmar or any
whole-house unit they
are quite large and noisy to put in a finished room.
You are right that it wouldnt cost much more to ventilate the rest of the
house, but its
an old home that doesnt require active ventilation whereas this newly
finished room is
extremely airtight (by design - its designed to be soundproofed).
Plus, I want it to cost a lot less :-) (like less than a grand for parts and
The Venmar unit I have can be installed in the attic...
Yes, they are--especially in "boost" mode.
I have a 50yr old home but after I replaced all the windows and doors
(with hi-perf. fiberglass), the humidity levels went through the roof.
Even though you lose thermal heat through uninsulated walls, it doesn't
mean that you're losing 'air'. So you can end up with a cold space
that is tight and stale/humid.
The Venmar cost me $699CAN plus $125CAN for the installation kit and
frankly, it's a really easy install. I bought it at Home Depot.
You are a dumbass seeking free advice for your problem here. We can't see
what you've got. We don't know where you live. We don't care about your
Take your pathetic cheap cock-sucking ass on down the road and hire a
professional to evaluate your situation, recommend a solution, and to
properly install it.
Now, go away.
There are lots of HRVs and ERVs out there..... Google is your friend.
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.
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
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
And you can take extra time and tape the joints and cuts real
nice--something I rarely see in "professional" work...
I have found many HRVs and ERVs, but no "single-room" type units like I
above in North America.
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
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.
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.
The problem is that the
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