Not sure how an ERV actually works? It seems magical, but it actually fairly simple. Join Ryan Hoger as he walks us through one. Music by www.bensound.com
The best explanation I’ve seen of this technology!
@dgb5820
3 жыл бұрын
This man offers high level presentation great video production
@ramakrishnang55
Жыл бұрын
This was an excellent presentation with a live demonstration. Cleared all my doubts.
@justrelaxing1501
7 ай бұрын
Finally a demonstration that I could understand. Very well done, thanks!
@wazzouz
4 жыл бұрын
Great demonstration. Surprising how well the heat transfers. Thank you!
@jamesdean3325
6 жыл бұрын
Ryan, Excellent explanation of ERVs and HRVs
@antonkorolev8059
4 ай бұрын
This is amazing! Thank you so much for the explanation! I think it’s the best video on KZitem regarding the topic
@rkafulani
6 ай бұрын
Well done video. Clear explanations that a lay person can understand❤
@glennmccarter6212
3 жыл бұрын
This video as really good at explaining ERVs. My HVACR class stumbled across you video of the psychrometric chart and it was very informative. I have copied this link and shared it with my instructor because I feel like our class will benefit from this training as well. Thank you for your videos and I look forward to viewing more of your content as needed.
@ruirocha2279
3 жыл бұрын
The best video I've seen to explain ERV. Congrats
@robertgolden3326
4 жыл бұрын
Thank you for this video, excellent demonstration and explanation of the ERV, answered a lot of questions!
@veizour
6 жыл бұрын
Well presented. Understood and now interested! Thanks!!!
@jasoncy31
Жыл бұрын
Okay, that's magic. Crazy! Thanks for posting this.
@cornpop7805
4 жыл бұрын
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!!
@TECTubefilms
4 жыл бұрын
Thank you. If you want to dive deeper, we did a 1.5 hour webinar on this same topic today. You can watch it at attendee.gotowebinar.com/register/3857937118863671564
@cornpop7805
4 жыл бұрын
@@TECTubefilms Awesome! I'll definitely check it out, but it will be 2 or 3 days from now. Unless I flake out on my responsibilities, then it will be sooner, so it'll probably be sooner...
@hmgriffin
4 жыл бұрын
Best explanation I've seen of what an ERV is and does.
@mansoorimtiyaz5081
3 жыл бұрын
One of the best explanation👍
@bollycovers6801
3 жыл бұрын
Thank you♥️
@jeylful
3 жыл бұрын
Great video and explanation... thank you! I am impressed with the efficiency of the wheel!
@zaalimable
4 жыл бұрын
Great video and wonderfully clear explanations. Thanks for doing this.
@Billcasiopost
6 ай бұрын
Really enjoyed the presentation style, thanks 👍👍
@umihani4336
Жыл бұрын
Im from Malaysia and this video help me understanding the system with full of information. Thank you from 2022
@hudaniel3213
7 ай бұрын
very good. finally someone explained it well.
@andyoohhh2061
3 жыл бұрын
Great explanation of how these work.
@MichaelFlatman
Жыл бұрын
Great demo, i'd love to see a video with smoke passing through the box to show the air paths.
@qasimkazmi786
3 жыл бұрын
Excellent explanation..congratulation brother
@AmiranBokhua
2 жыл бұрын
Good job explaining main principle and types
@olegyakovlev7319
5 жыл бұрын
Thanks! Great explanation. I was able to peak some design tips for my DIY ERV.
@eznAnze
3 жыл бұрын
Awesome video! Explained very well, both theory and example! Thanks!
@alextavuchis2655
3 жыл бұрын
What a great presentation, well done.
@Shutyourjibbs
3 жыл бұрын
Great video! Thanks for making it easy to understand!
@sheetmetalwork
Жыл бұрын
Thanks for explaining this topic and the demo, much appreciated.
@shailong3254
Жыл бұрын
Best explanation on KZitem ❤❤❤
@oscargrouchthegreeng
11 ай бұрын
That was VERY helpful to my understanding. Thank you!
@jydog57
3 жыл бұрын
Very impressive vid. Keep up the quality. Will now have to research ERV's.
@Indian-Canadian
Жыл бұрын
Thank you for the video. I never came across ERVs in my 8 year long career as a facilities maintenance manager. I came across this technology when I moved to a cold country last year and really wanted to know how they worked.
@coasterkat4432
Жыл бұрын
Thanks so much! You explained everything so well!
@rinkly
2 жыл бұрын
Fantastic explanation! Thank you very much!!
@ParkerJonesmtb
3 жыл бұрын
Fantastic video guys; this will help with my power engineering exams :)
@tomekc1113
3 жыл бұрын
lots of info, well presented, thanks!
@digvijaysinghchauhan9101
5 жыл бұрын
You explained it so good. Keet it up...
@iabhishekaggarwal
2 жыл бұрын
Thanks a lot for this Awesome Video. Got a really Nice Idea of how these systems work.
@asifalikalody1722
4 жыл бұрын
Great explanations.Thank you sir👍
@maksim3722
3 жыл бұрын
Very good explained even for those with English as a second language! Thank you and greetings from Germany!
@lorenaecheverria8723
3 жыл бұрын
Do you need to keep it on all times or only when you need it
@minh4835
4 жыл бұрын
great demo and info!
@Henryp001
5 ай бұрын
awesome video for explain two differences
@zakariavahidi8961
4 ай бұрын
perfect explanation.
@adammidcal2425
5 жыл бұрын
I always assumed HRVs are a waste of money. But I live in Monterey Ca where the climate is mild and perfect. But this video explained it great. I can now see them being beneficial in extreme temps with extreme humidity where fresh air is important.
@kjrey9878
Жыл бұрын
Look, I just stumbled across this video. I'm a network engineer and understood 0% of how A/C, ventilation, HVAC, etc worked. But this guy did a GREAT job explaining this! (*me yelling across the house* "Hey honey, you want me to explain to you how an ERV keeps a building cool?!") That's right, I'm that kind of nerd who MUST share facts about things i'm excited to learn. 😋🤣
@pwerlvlin
Жыл бұрын
Yea this guys explination is top notch! I couldnt make heads or tails of why this type of system is used or its purpose... Now I want 1! lmao Oh and dont worry the nerds will inherit the earth! :P
@aaronlavergne3274
2 жыл бұрын
This was such a great video to understand ERV technology. The demo unit with the thermometers makes it that much better. Thanks so much!
@MrVinurox
2 жыл бұрын
Very informative. Thank you
@BAGINAZARD
4 жыл бұрын
glad someone explained this.
@daowara85
Жыл бұрын
Thank you for your explanation.😊
@lukeknox8548
2 жыл бұрын
struggling to grasp until very end. very helpful
@ogweasel4273
4 жыл бұрын
Very good video!!! Thanks!!
@LeviAllen
7 ай бұрын
Great video.
@love_ur_nature
6 жыл бұрын
Fantastic explanantion
@labiadmohammed3484
Жыл бұрын
thanks for sharing the video
@tomh921
2 жыл бұрын
Very informative!
@zteaxon7787
4 жыл бұрын
Great video! Thanks!
@truknawa7535
4 жыл бұрын
good explaination thank you
@nickfranklyntaylor
3 жыл бұрын
Great video
@ronrocheleau6303
Жыл бұрын
Thanks awesome video
@danpmatz
5 жыл бұрын
Great vid
@jpsum
3 жыл бұрын
Awesome video! ASHRAE recommends as much as outside air as possible for COVID. This is great technology to have to allow taking mostly outside air even when it’s hot or cold outside without impacting energy usage or performance.
@Duke93720
3 жыл бұрын
Snake oil
@EXPLORINGPIPING
4 жыл бұрын
Nice concept sir
@cdub961
2 жыл бұрын
Thanks bro super helpful!
@danielivko6819
Жыл бұрын
dang didn't realize Richard Jefferson had a background in hvac
@kerrye83
9 ай бұрын
😂
@compendiousperspicacity
29 күн бұрын
It's Robbie Lawler bro
@Akhil5179
4 жыл бұрын
thank you friend
@healingbrain
2 жыл бұрын
useful in the age of COVID when we want more fresh outside air coming in, and human exhalation going out of the building, without too much loss of heat or cooling
@EngelUniverse
2 жыл бұрын
Thank you!
@danielchoi6317
3 жыл бұрын
Thank you so much video
@jhuh1758
4 жыл бұрын
well done
@RineboBohead
4 жыл бұрын
Thank you!!!
@markepstein8460
2 жыл бұрын
Excellent video! Studying for an architecture registration exam, this is a really great illustration of something we usually only see in diagram form. Thank you for the thorough explanation!
@antialias4205
6 күн бұрын
thank you
@kitsurubami
2 жыл бұрын
I finally understand it!
@premsis
5 жыл бұрын
Thanks
@paullambert1485
2 жыл бұрын
I have a question for you I just started working at a three story hotel I happen to go in the attic and found an ERV not running and hasn't been in awhile we have ducted energy on the first floor and Ptac units in all the rooms would it be wise to get the ERV running again to save energy cost or not ?
@MadComputerScientist
2 жыл бұрын
Absolute thermodynamic witchcraft.
@everydreamai
2 жыл бұрын
Blown away by how effective it works in that final demo. I'd expect to split the difference 50/50 on temperature at best, but it seems you're closer to 90% thermal energy rejection which is nuts.
@TECTubefilms
2 жыл бұрын
For commercial systems, the minimum per most energy codes is 50% total recovery (sensible + latent). Most wheels are 65 to 75%, but some can be higher.
@Pendrige
2 жыл бұрын
@@TECTubefilms Is there a difference between the efficiency of a wheel vs box style heat exchanger? Great video and demo btw 👍
@TECTubefilms
2 жыл бұрын
Yes, per give area of space, a wheel generally trumps all other ERV types. For example, one of the manufacturers we use can run 30,000 CFM thru a wheel in a certain size cabinet. However, when they use that same exact cabinet chassis for a fixed plate ERV, they can only do a our 12,000 thru it.
@albelanger6126
3 жыл бұрын
Great/fantastic/excellent video, love the plexiglass. I am looking for a similar system, but where the air exchanger could be bypass in spring & fall (hot days & cool night & since air is so cool at night, there would be no need to have the AC on). Am I missing something here? I can’t seem to find a system that does that.
@TECTubefilms
3 жыл бұрын
Yes, most commercial ERVs have a bypass around the heat exchanger for "economizer days," since this is required now by IECC and most other energy codes.
@justlotfy
2 жыл бұрын
Thaaank you
@jr3474
6 жыл бұрын
Nice!!
@motisingh9705
3 жыл бұрын
I am having hall with entry 13x11 feet with length 67 feet and width 37 and height 14 feet please give your best advice for.air ventilation
@rahuljoshi3860
3 жыл бұрын
Great 👌👌👍👍
@MindLaboratory
Жыл бұрын
6:47 - if you want to learn the difference between HRV and ERV and how that works
@MichaelFlatman
Жыл бұрын
In the UK we have humid winters, where ventilation is key to keeping the inside of homes warm and dry. Many people are talking about positive input ventilation (opposite of extractor fan just pumping fresh air into a central place to be blown through gaps of the building).. This increases heating cost as many units have a 500w duct heater to warm up the incoming air stream (~10c to -2c typically) and even then people complain of cold drafts from the unit.. I wonder if an HRV would help benefit. Use the damp but warm exhaust from bathroom to preheat the incoming air somewhat..
@TECTubefilms
Жыл бұрын
Yes, you can run the bathroom exhaust through an HRV to reclaim the heat and transfer it to the incoming ventilation air to pre-heat that air less expensively.
@TECTubefilms
Жыл бұрын
Do not use an ERV in your application since that will also reclaim the moisture from the bathroom exhaust which it sounds like you do not want.
@khandavillianirudh8741
3 жыл бұрын
Now I'm clear on how Erv works. Previously I got a lot of confusion on erv's
@shivashetty4051
3 жыл бұрын
AMNJIRI
@kathys1236
2 жыл бұрын
What should the house exterior intake cover look like? We have a 8"x 8" bug screen with louvred flaps, but someone pointed out that it should be a boot cover, so that the outside air coming in is not impeded by the closed louvre flaps. Does it matter? Thank you, great video!
@TECTubefilms
2 жыл бұрын
If the flaps are closed when the ERV is running then yes it matters.
@hvacgabe5889
6 жыл бұрын
Good video and information. So can you have residential type hrv in an office setting?
@TECTubefilms
6 жыл бұрын
You "could" but a residential size HRV in an office building, but it would not be large enough. The HRV should be sized based on the exhaust and outside CFM flows that the building was designed for. Residential ERVs are generally under 300 CFM, which would be very small for a regular office building. Unless you are talking about a small business office with just 10 people.
@hvacgabe5889
6 жыл бұрын
Tec Tube thanks
@redsquirrelftw
9 ай бұрын
I'm thinking of building an small HRV, is there an advantage to the wheel type vs fixed fins? Leaning towards fixed fins and doing multiple cross flow cores or a single counter flow as it would be easier to build, but the wheel ones are also kinda intriguing.
@TECTubefilms
9 ай бұрын
The advantage of a wheel is that it has significantly higher heat transfer ability for a given size of cabinet. The disadvantage of a wheel is if you need AHRI certification for zero crossover (aka EATR).
@billkenneke8249
4 жыл бұрын
Very good video, thanks. Does air flow through the wheel style heat exchanger (enthalpy wheel?) or across it? Are they available to diy'ers anywhere?
@TECTubefilms
4 жыл бұрын
The air flows through it
@TECTubefilms
4 жыл бұрын
Not sure how to answer your question about installing one yourself. You would need knowledge of HVAC design/sizing, sheetmetal working, and electrical wiring, and in some states/municipalities licenses to do work in those trades. Plus the smallest enthalpy wheels on the market are too large for homes. Residential applications would us the enthalpy core style.
@MrYosis
6 ай бұрын
Thank you for your explanation, so the silca gel. Is it replaceable?
@TECTubefilms
6 ай бұрын
No, it does not need to be replaced. It is impregnated into the polymer. It doesn't wear off or anything like that.
@allenbankstusc
2 жыл бұрын
I love the ERV demo unit, makes it simple to see during the summer months how the temp exchange works. I wonder if you have made a video with this reversed, showing the intake/exhaust during winter month where cold air is being introduced to the inside? I recently built an air tight house and do not have any type of ventilation system installed, hence it's drawing from the windows and doors creating a vapor in the cracks. I also have humidity levels that are running between 60-70% showing on my thermostat, btw I live in Alabama. I'm thinking I need an ERV to help bring in fresh air to balance things. Will this also help to lower my humidity level?
@TECTubefilms
2 жыл бұрын
No, we did not make a winter video. However, it would do the same thing as the demo in this video. Just move the labels around. Instead of the warm air being labelled as "outside air," it would be "return air."
@TECTubefilms
2 жыл бұрын
An ERV will only help with indoor humidity issues if the humidity is being caused by outside air coming in. When the ERV brings in the outside air in the summer, it transfers the heat and the moisture to the exiting exhaust air so it does not come back in. However, if the source of your high humidity is something inside the house, then an ERV will make the problem worse since it will transfer the humidity from the return air back into the supply air. So the first question with any humidity issue is "what is the source of the moisture?"
@TECTubefilms
2 жыл бұрын
There are lots of things you can do to deal with high indoor humidity. This would be an abbreviated list from best to worst (the list changes though based on WHY you have high humidity). 1) eliminate moisture sources (put caps on sump and ejector pits, run bath fan when showering, etc) 2) Right-size the A/C. 99% of all system are oversized and more than half are grossly oversized. The smaller the A/C capacity, the longer the run cycle, and hence the better the dehumidification 3) Multi-stage A/C. This also keeps the system running and the evaporator dehumidifying 4) Lower blower speed for regular A/C mode 5) On demand dehumidification using the A/C and lowering the blower speed even lower than regular A/C mode 6) On demand dehumidification using the A/C but not lowering blower speed further because the system is too basic to do that 7) Slightly larger evaporator coil with more surface area 8) dehumidifier You should note that some of the decisions above affect other stuff so should not be modified without research. For example, you may lower blower speed to dehumidify better but then realize you have a crappy duct system and can no longer get enough air to certain rooms.
@jovelyncalimbo2609
3 жыл бұрын
great
@slipperyslope3912
9 ай бұрын
This is an absolutely excellent video explanation. Close-ups, hands on, shows what's happening. He mentioned an exhaust duct "from FURNACE to HRV, then vented outside" at 5:55. Is this true, or was this duct pulling exhaust from bathroom? I'm trying to understand how to tie into existing HVAC ducting.
@TECTubefilms
9 ай бұрын
Yes, in this particular ducting scenario (and there is more than one way to duct it), the HRV pulls air from the furnace return and exhausts it outside. It then pulls air from the outside and replaces it in that return duct. This is the easiest way to duct it, but it also doesn't save any energy. The best way... as you hinted at... would be to pull air from the bathroom instead of using a bath fan and run that thru the HRV instead of pulling return air. This is air you planned to throw away anyway so may as well reclaim energy from it.
@slipperyslope3912
9 ай бұрын
@@TECTubefilms Ok interesting. Thank you. I'm less worried about energy, more worried about excessive redundant systems, ducting, and wall penetrations (bath fans, HRV, kitchen fans, makeup air, furnace, dryer ducts, etc). Do they make enthalpy core boxes (without the HRV blowers) that can duct straight to the air handler using its central fan? To consolidate some of these duplications? Which vents can be combined? I don't understand why we ditch the high CFM flow rates and high MERV filtration of an air handler for these tasks, and instead use these dinky little 100cfm central exchangers. In full redundancy no less.
@TECTubefilms
9 ай бұрын
@@slipperyslope3912 Pretty much the ONLY reason to install a HRV is to save energy. If you don't need/want the energy savings and just want fresh air, then there are several methods to duct outside air into the HVAC system without the expense of a HRV.
@TECTubefilms
9 ай бұрын
@@slipperyslope3912 No, we have never seen a residential size HRV without a fan. Just ducting it into the air handler would not work. The pressure drop of the HRV heat exchanger and filters is so high, that the air handler will just draw all of its air from the return duct and none from the HRV duct.
@TECTubefilms
9 ай бұрын
@@slipperyslope3912 You do not lose the MERV filtration with a HRV ducted into an air handler. The outside air coming thru the HRV is ducted into the return of the air handler upstream of the air handler's filter.
@explaincauseidontgetit3294
3 жыл бұрын
Very good demonstration. How are the heat molecules separated by that spinning wheel?
@TECTubefilms
3 жыл бұрын
No molecules of the air are separated. The air molecules pass straight through the wheel. In regards to the heat... heat always moves from hot thing to cold thing, so if the air is warmer than the wheel, then the air heats the wheel. Then the wheel spins to the other airstream where the wheel is not the warm thing so it transfers its heat to that cooler airstream.
@TECTubefilms
3 жыл бұрын
Just noticed your name. LOL
@RaldrinSantos
5 жыл бұрын
Great video! What happens if its warm inside the house and you want to have the cold air outside to cool your house. That is the scenario in tropical countries where at night time it is usually colder outside than inside. Can I still pump in fresh air at the same time make inside the house cooler?
@TECTubefilms
5 жыл бұрын
That scenario occurs frequently in commercial buildings so the units include an automated bypass which allows air to run thru the ERV fans and duct without going thru the actual heat exchanger. This is in place of the economizer that most standard commercial HVAC air handlers have. Small residential ERVs do not typically have a bypass, just like residential HVAC systems do not have economizers systems. The first cost is too high in residential for the energy cost benefit.
@brothajay9626
5 жыл бұрын
a mixing box would be perfect for residential applications. It brings in cooler dryer air from the outside and lowers the energy load on your cooling system .
@MtnXfreeride
2 ай бұрын
Hard to believe it can transfer the heat that quickly. I want one it would be rough to get it installed.
@jaxoncanseeyou
Жыл бұрын
In a core-style residential unit like you showed, is it possible to turn an ERV into an HRV (or vice versa) simply by changing the core from one with a metal heat exchanger to a polymer heat exchanger (or vice versa)?
@TECTubefilms
Жыл бұрын
Yes, that is possible as long as your model has a drain. Lifebreath used to offer this option, but not sure if they still do.
@TFSGEO
3 жыл бұрын
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.
@TECTubefilms
3 жыл бұрын
Yes, but what do you mean by "lost?" Are you trying to figure out how much fan energy is being used to move this air? If that is the case, most selection software tools will tell you this kWh. Or are you trying to figure out how much heat is not being transferred that could be? If this is the case, then that is represented in the AHRI rated "effectiveness" percentage. Or are your trying to figure out how much leakage goes around the wheel on accident? This is represented by AHRI's measurements of OACF and EATR.
@mherke
3 жыл бұрын
Hello, I have a barndominium home that has spray foam insulation. The SPF is not allowing any fresh air into the home and it off gasses some during the summertime. My goal is to bring in fresh air to help with the off gassing. Which of the 2 devices would help me better, an ERV or whole house ventilator with dehumidifier? Also, does the ERV only work when the HVAC system is running? Thank you for your time.
@TECTubefilms
3 жыл бұрын
The ERV will be less expensive to operate. The dehumidifier can remove moisture from both the indoor air and the incoming outside air. The ERV will only remove moisture from the incoming outside air.
Пікірлер: 374