Fundamentals of Energy Recovery Ventilators (ERVs)

Not sure how an ERV actually works? It seems magical, but it actually fairly simple. Join Ryan Hoger as he walks us through one.

[KevinMaxwell-ot]

This was an excellent demo of the wheel-type ERV. Thanks!

[dgb]

This man offers high level presentation great video production

[cornpop]

I've been trying to fully understand HRVs ERVs for months and although I got to where I understood what they did, I had no idea of how they did it. Of the dozens of videos I've watched, your video is the ONLY one I've found that gave me the information I wanted. Excellent job!!

[Billcasiopost]

Really enjoyed the presentation style, thanks 👍👍

[jasoncy]

Okay, that's magic. Crazy! Thanks for posting this.

[iabhishekaggarwal]

Thanks a lot for this Awesome Video. Got a really Nice Idea of how these systems work.

[ОлегЯрмош-пя]

Thank you very much! Very good explanation.

[FloresEsteban]

We have a huge one in our building's air handling unit. We are seeing only about 8-10 degree drop from supply air temp before it hits our chilled water coil. In our area, our summers can be quite hot (100+) and seeing your demonstration, I am wondering if our wheel is not doing what it's supposed to! hmmm

[audreyrappaport]

I'm surprised the wheel spins that fast. I thought that each section of the wheel would need much more time to absorb the heat and change temperature before being able to transfer the heat to the other side. What material is the wheel and how is it able to transfer heat while spinning so fast?

[khandavillianirudh]

Now I'm clear on how Erv works. Previously I got a lot of confusion on erv's

[hejarkhalid]

I heard about HRV just today, wow, why isn't this thing ubiquitous by now?! I also wonder the amount of energy needed to operate it.

[TFSGEO]

Is there a measurement of how much energy is "lost" in this process? I realize that something can be derived based on that demo with the thermometers I am just curious if there have been papers/studies published on these.

[raczyk]

How much do these things actually save you though. I'm in Canada and wonder by how many degrees the air temp is being heated or cooled?

[craigbrickner]

Would you say the ERV runs 24/7 in a residential application? My load calcs are calling for 84cfm so we assume that's constant.

[natchaniyomthammakit]

What is the material of the fan in the demo unit? Is it a metal sheet?
And when we turn it on, the motor on both ends are the one pulling the air making the middle turbine moves by itself?

(Wanting to make one for the house) please help :)

[joey]

Hi, could you help me solve this question? If my home rh is 70% at 18, outsidw is 40% at same temprature. What will the in door humidity be after several day use? Thx

[chriskz]

so with this system can we do away with a typical air conditioning unit? tnx

[henry_]

Is it better to use fins as heat exchanger than copper tubes?

[NickDittes]

That's a neat demonstrator, but I think it exaggerates the efficacy of the system. It looks like there's a significant gap between the wheel and the plastic sheet separating the top and bottom. A lot of air would be exchanged between the top and bottom.

[AtlasReburdened]

They went through all that trouble of building a functional demonstration model and they didn't bother to include humidity sensors for a complete thermodynamic picture of what's happening? Seems kinda silly, like just walking away from the Panama canal when there's one mile left to dig.