a miracle delivery... need advice

finally the HRV is installed, well 95% installed as i still need to hang the duct with some metal straps instead of ropes :)

here are some pic, the top duct is for incoming fresh air, the bottom duct is for stale air exhaust where it connects to a T.
right side of the T connects to a second floor cieling vent, and the left side of the T connects to the soon to be fish room,
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i decided to install the filter on the incoming fresh air duct becuase the filter box was not insulated, worry that during the winter the filter will freeze up,
there alot of taping on the elbows as they tend to leak alot!
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here a pic of the vent into the soon to be fish room,
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here a pic of the control mounted, being that the idea of a HRV is to fresh air exchange with the outside that this control should know the outside conditions but it doesnt! so we got a remote temp/humidity sensor, its not very good, works for the time being,

at the moment its running in defrost/recirculate mode, there is a 5th vent on the HRV which is controlled by a motorized damper so in this mode it will draw air from the basement instead of outside, being that the temp in the basement is cooler it is sometime good, still i would like to know the temp/humdity of the basement, need to get a multi probe temp/humidity station :)
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we try to balance the HRV input vs output but failed, using a garbage bag to do so doesnt work, have to figure something else out,
 
Probably better to insulate the pipes before fastening them with metal straps.
When I first put mine in, I only insulated the incoming air duct, not realizing that the outgoing one could condense water on the pipe also.
With your setup and the lengths of ductwork to go between the unit and the outdoors, I would think you are not only going to have to worry about condensation, but temperature transference to the basement from the ducts to and from the outdoors.
 
I sometimes have a problem with vibration when running the hard pipe on those units. You may have to run insulated flex duct if you run into that problem.
 
Probably better to insulate the pipes before fastening them with metal straps.
When I first put mine in, I only insulated the incoming air duct, not realizing that the outgoing one could condense water on the pipe also.
With your setup and the lengths of ductwork to go between the unit and the outdoors, I would think you are not only going to have to worry about condensation, but temperature transference to the basement from the ducts to and from the outdoors.
i tried to run the i/o ducts short as possible but couldnt, due to the exhaust vent from the water heater, after installing the installation i shouldnt have a temperature transference issue anymore?

not sure what type of insulation to use, the silver-bubble-wrap type or the fiberglass type which would you recommend?

thanks for your advice rayjay :)

I sometimes have a problem with vibration when running the hard pipe on those units. You may have to run insulated flex duct if you run into that problem.
at first we used the flex insulated duct but it was very hard to handle, its very springy, would droop here and there, so i opt to go with hard duct for more control, like you said if it becomes a problem i probably will replace the elbows that connects to the HRV ports at first and work from there, thanks for the advice :)

redrider911, it sounds like you work in HVAC?
can give some insight on what your customers thinks of these HRV?
 
For insulation, go with the maximum insulation factor you can get.
I went cheap the first time and had to replace with better fiberglass insulation that I had to order from an HVAC place as the stuff at home depot wasn't sufficient.
I don't know the bubble type of insulation so I can't comment there.
As far as I'm concerned, for the distance you are going, you did the right thing to go with rigid ducts.
Flex tubing looses a lot of flow due to the ridges, much more negating the reduction due to the elbows.
I agree that you will be best with short flex pieces from the HRV to the rigid duct for all connections.
 
Yes I do HVAC, mostly the high end homes in the Buffalo area. It is hard to sell the HRV. Trying to explain to the homeowner that the house is built so tight that there are not that many air exchanges and this may lead to health problems down the road and the cost of the install they just don't see the value in having one. The people that do have them have never mentioned anything about whether they notice a difference in air quality. Of course, they don't have a big box of water in their house :). I would be interested to see if you notice a difference. Please keep me posted.

As far as insulation, you can wrap the pipe with duct "sleeve". They make 2 different r ratings that I cant remember right now. The standard rating is normally kept in stock at any hvac supply house. They also carry a thicker, higher r rating that would normally have to be special ordered. The same goes for the insulated flex. I will find out about the r ratings in the next few days so you will have it for reference.
If you get the sleeve, ask them for a plastic cap they make that you put on the pipe so you can slide the sleeve over the pipe easier and faster.
 
For insulation, go with the maximum insulation factor you can get.
I went cheap the first time and had to replace with better fiberglass insulation that I had to order from an HVAC place as the stuff at home depot wasn't sufficient.
I don't know the bubble type of insulation so I can't comment there.
As far as I'm concerned, for the distance you are going, you did the right thing to go with rigid ducts.
Flex tubing looses a lot of flow due to the ridges, much more negating the reduction due to the elbows.
I agree that you will be best with short flex pieces from the HRV to the rigid duct for all connections.
thanks again for the advice Ray, will call around for a quote tomorrow :)

holy cow....totally impressed with this! that looks incredible.
thank you Kat :) i am too impressed that the sensor reported HOD of 117degree!!

Yes I do HVAC, mostly the high end homes in the Buffalo area. It is hard to sell the HRV. Trying to explain to the homeowner that the house is built so tight that there are not that many air exchanges and this may lead to health problems down the road and the cost of the install they just don't see the value in having one. The people that do have them have never mentioned anything about whether they notice a difference in air quality. Of course, they don't have a big box of water in their house :). I would be interested to see if you notice a difference. Please keep me posted.
thanks for the info Chris, much appreciated :)

to be honest, if i remember correctly, last night outside temp was ~70 which I thought was a good opportunity to turn on the HRV, so for the first time last night we ran the HRV as a full working system, every night we would walk upstairs and immediately on the first landing you would always feel a difference in temp and humidity, much like walking from the basement to the first floor but not that drastic, but last night it was different, there was a very small change from the first to the second floor which was a pleasant surprise to me, my wife also sense the same, what was odd was that the inside temp did not fall but for 1degree... From 77degree but then again maybe it was just the excitement of running the new system and the expectation of it working played in our minds :) this was much like having the windows opened, so i am wasting electricity!

i am learning that the HRV is not a dehumidifier, and it works best when the outside air is what that is desired and less humid that u want inside,
 
FWIW, I use my HRV year round along with the furnace fan being left on 24/7 as well.
I find this keeps the house fairly well even temperature plus give sufficient fresh air to the house that I don't have pH problems due to high CO2 levels in the home.
Winter is where I find the biggest difference as I had to replace all the windows due to rot from not having an HRV.
Now, I still get some condensation on the windows in the absolute coldest days of winter with other days having virtually none, but it's nothing compared to what I had before.
I may notice a bit more than others as I usually have between 800 and 1000g in the basement at any one time.
 
its been awhile and no real progress to report,
going round and round on how to build the basement room...
but anyways i have a new toy i want to share, its not my first choice but i am gonna learn the hardway :D

the open box with goodies :)
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Seashine Aquarium Lights,
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power suppy, 300w? well see...
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some more detail pics,

top view, lots of fins!!
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side view with the terminals for external dimming control,
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otherside view with on/off button and dimmer knob,
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more pics :D

front view, forgot to add the hinge option... bummer... gonna have to call them up,
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reflector, has wiremess, probably stops the fish from being microwaved :D
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and the "tic tac" (plasma bulb)!
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more pics to come, going to finally turn it on! :bounce3:
 
Sweet! Excellent choice for the tank and room! Grabbing some popcorn to watch the build come to life... Hopefully it won't go stale waiting :)
 
wow lang thats an awesome light !bet that cost a pretty penny
i have yet to see any plasma lite tank grow incredibly beautiful sps like your tank using 20k radiums, so i am pretty much doom from the start... going to be a costly trial and error, but i am hoping it be fun along the way :D

Sweet! Excellent choice for the tank and room! Grabbing some popcorn to watch the build come to life... Hopefully it won't go stale waiting :)
LOL!! :lolspin:

oh that is sweet!
thanks!

Does that one light have enough spread for the entire tank?
at the moment i am not sure, but leaning towards no, i planned on having two but have yet enough funds :(

i played with it some last night, and took some pictures but it came out aweful, gonna try and take some more tonight :)
 
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