How Does Energy Recovery Ventilation Work? | This Old House

Richard Trethewey shows how Energy Recovery Ventilation works by using different colors of smoke to follow the air flow through an ERV unit.

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Energy recovery ventilation units keep fresh air in the house without sacrificing the energy used to heat or cool the air.

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How Does Energy Recovery Ventilation Work? | This Old House

[jwahrenburgrhahvac]

Could not have been done easier than this. Great video!

[paulcochran]

Little did he know, but Richard just called in an air strike.

[Chupria]

Wow, this guy goes straight for it. I always wonder if the air mixed, now I know. Thank you.

[ZombielandPB]

Oh my gosh thank you for explaining this properly. I spent about 20 minutes trying to find a video for someone to watch rather me type it out explaining it how it works. So many videos did not explain what a heat recovery unit does when the title says it right in the topic.

Thank you.m

[macsmith]

I just love how simple they make things

[patsempervirens]

I’ve never seen this kind of baby gender reveal before

[MrGoodtime]

Best explanation of an ERV that I found

[keithhupp]

Awesome video. You took smoke to the face just for us. Much appreciated!

[Shadkow]

I love this type of thing, super interesting!

[senjin]

Thanks, finally found a video that showed how the channels pass without air collide .

[Guillotines_For_Globalists]

Do they really not mix? The color looked different.

Also, does the core have to be replaced? Is there a secondary filter to remove the outdoor dust and containments? How much does the core cost if so? I know these HRVs can vary quite a lot in size depending on how many square feet they are intended for.

[georgedoolittle]

Have already paid for that heat absolutely 😊

[wkm]

In the video thumbnail I thought it was chalk line chalk. LOL

[ralphiewyowyo]

We live in the upper Midwest. Hot humid summers and brutal cold winters. What % of the time do I run my system in each season? More in summer, less in winter??

[Mxy-ffzk]

I had my doubts until I saw the red and blue

[martylynchian]

I live in South Florida, I need hot humid air outside and dry cold air inside. Will this magic box do this?

[pfx]

Cleaning my HRV right now and watching this video. Air filters and main element sitting in soapy water.

[meowzic]

I would like to purify air especially during fhe winter and controlling humidity would be nice during rhe winter.. wonder if this does that?

[DaveBoxBG]

I am assuming that the "core" works as a filter too and will have to be replace as a consumable? Right?

[nickvuong]

Thank you for this info. Do The in flow and out flow ducts need to be insulated ducts or no since the ERV does the temp exchanging too?