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Search took 0.00 seconds. Search: Posts Made By: Piwoslaw
Forum: Conservation 03-20-19, 02:24 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
The filters and/or ventilation motors may get...

The filters and/or ventilation motors may get wet.
Excessive moisture may lead to mold.
Enough water can start to clog some of the passages, both reducing efficiency and increasing risk of mold....
Forum: Conservation 12-18-16, 02:21 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
A clear HX core? If you also made the outer...

A clear HX core? If you also made the outer casing clear you could observe what is happening inside - condensation, mildew, clogging, etc.
Forum: Conservation 10-08-16, 02:10 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
One large diameter channel will give you less...

One large diameter channel will give you less noise (and less resistance) than two individual channels. If you can afford (either price- or space-wise) a larger diameter, then go for it! You can...
Forum: Conservation 01-14-16, 02:33 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
@KKNgroup - Have you seen the thru-the-window...

@KKNgroup - Have you seen the thru-the-window exchanger in this post (http://ecorenovator.org/forum/conservation/891-diy-ventilation-heat-exchanger-38.html#post27793)?
Forum: Conservation 06-11-14, 11:23 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Run your intake air through a few meters of...

Run your intake air through a few meters of buried tube(s). That way it will be precooled in the summer (and slightly dehumidified) and prewarmed in the winter. Not only does this increase the...
Forum: Conservation 04-18-13, 11:23 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Thanks for the data! When you install larger...

Thanks for the data!

When you install larger filters the resistance should drop, and with it the noise and power consumption.
Forum: Conservation 01-25-13, 12:23 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Welcome back Pladijs:) Congrats on building a...

Welcome back Pladijs:) Congrats on building a working HRV.

I took a look at your numbers on the website and I noticed the following:

Should these two be switched? The RH should be lower after...
Forum: Conservation 01-22-13, 02:49 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
How about the ingoing air blowing over a small...

How about the ingoing air blowing over a small pan of water? This would catch some of the evaporation, increasing RH a bit. Also, the more humid the air, the less water vapor it will pick up. The up...
Forum: Conservation 01-15-13, 04:19 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
How about this: I'll share my rough calculations...

How about this: I'll share my rough calculations with comments and tell what and where can be modified. Then anyone can plug in their own parameters to get a better approximation of their own system....
Forum: Conservation 01-15-13, 09:20 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
There shouldn't be much condensation since the...

There shouldn't be much condensation since the temperature difference across the HX will be no more than a few degrees. In some cases there might be some, but it will be in the duct already going to...
Forum: Conservation 01-14-13, 09:55 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Notice two pairs of ducts: (bathroom &...

Notice two pairs of ducts: (bathroom & livingroom) and (bedroom1 & kitchen). In both pairs one intake and one exhaust duct run next to each other for 2-4 meters. Can you turn each pair of ducts into...
Forum: Conservation 01-10-13, 11:45 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
I'm not claiming that this is an objectively...

I'm not claiming that this is an objectively sound way of describing HRV/boiler/furnace efficiency, it's just the way that they are marketed.
There was an efficiency scale used in the times before...
Forum: Conservation 01-10-13, 09:47 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Mold happens in damp environments without much...

Mold happens in damp environments without much airflow. There is lots of airflow inside the recuperator, but there may be corners inside the HX core with less ventilation.

Also, moist cardboard...
Forum: Conservation 01-10-13, 12:01 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Not sure if this is technically possible in your...

Not sure if this is technically possible in your house, but maybe the HX could be hooked up to the cooking hood so that it sucks up the stale air directly from the kitchen?
Forum: Conservation 01-09-13, 02:20 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Fornax & Kostas: One more HUGE thanks for...

Fornax & Kostas: One more HUGE thanks for building your recuperators and for sharing the details here. The step-by-step write-up is priceless for any would-be DIYer with less than ideal manual...
Forum: Conservation 12-31-12, 10:49 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Kostas, isn't that box missing a wall? ;)

Kostas, isn't that box missing a wall? ;)
Forum: Conservation 12-23-12, 01:56 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
The hexagonal shape does pretty much the same,...

The hexagonal shape does pretty much the same, but uses less material. From a DIY POV this increases the amount of triangular scraps that are left over, and is a bit harder to make.

Add some...
Forum: Conservation 12-21-12, 01:38 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Kostas, in those pics I see shiny foil and some...

Kostas, in those pics I see shiny foil and some foam. Are those for thermal insulation? Or is the foam to reduce vibrations and noise?
Forum: Conservation 12-20-12, 11:26 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
I can't wait to see a side-by-side test of them!...

I can't wait to see a side-by-side test of them! I'm very interested in the difference in efficiency of the two materials.
Forum: Conservation 12-17-12, 12:29 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Two fans are good not only for flexibility, but...

Two fans are good not only for flexibility, but can also (potentially) reduce energy usage. During the nice warm spring and autumn there will be a few weeks or months when you won't really need the...
Forum: Conservation 12-14-12, 11:40 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
^^ Yeah, I forgot to mention the thermostat...

^^ Yeah, I forgot to mention the thermostat by-pass. Also, The solar box would be removed altogether during warmer months.
Forum: Conservation 12-14-12, 02:36 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
This is a small heat pump, it doesn't need a 16kW...

This is a small heat pump, it doesn't need a 16kW compressor! Since you'll have relatively slow airflow, then make the HP's heat exchangers large. Also, you won't be moving a terribly large amount of...
Forum: Conservation 12-11-12, 03:55 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Ooooo, this project will be fun! I think I...

Ooooo, this project will be fun!

I think I recall reading that using ECM squirrel cage motors is the most efficient and quietest solution, though not the cheapest. Not sure what kind of airflow...
Forum: Conservation 03-01-12, 07:54 AM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Hello Gasper, welcome to EcoRenovator:) I...

Hello Gasper, welcome to EcoRenovator:)
I inserted the link's url in your post. BTW, is that your web site?


I think that using cardboard for testing is a good idea. It's much cheaper and easier...
Forum: Conservation 01-05-12, 02:34 PM
Replies: 575
Views: 1,155,537
Posted By Piwoslaw
Nice numbers, AC and Mike:) Over at the...

Nice numbers, AC and Mike:)

Over at the Polish builders forum someone posted this (http://forum.muratordom.pl/showthread.php?57886-Rekuperator-quot-tymi-r%C4%99cami-quot-robiony&p=3985896):...
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