How tight is too tight?

so where is the 3rd video

its nice to see the work being done so far it doesnt look to hard to dyi it

Fits in a normal coat closet! Good work Larry!

Hi Gary, how do you connect the wires to the four ports on the MVHR, or any of the accessory boxes? Do they just push in? I've never seen these kind of connector blocks.

How do you know in the comfoair 200 which is the exhaust or incoming side? Thanks!!

you are a good teacher

"My knowledge of construction reduces the cost of upgrading buildings", right Hakim?

This is by far the best summary video that I have seen that explains the basic concept and shows the size and low noise level of the HRV.

Thank you for this! The option box does not come with instructions so you have to google them, there are not enough videos like this on zehnder installations.

I'm planning out how I want to heat/cool/ventilate my house which will be built in Canada, and this video finally answered the question about whether the ground source preheater could sufficiently heat incoming air when the temp of that air is -40C. Zehnder needs to update their literature/documentation on the site because it is not clear what climates this equipment can effectively operate in. BUT I'm really happy to hear that this system (Zehnder ERV paired with ground-source pre-heater) will work for me where I am building without needing a separate heating/cooling system!

Can you mount them vertical on a wall or angled on a vaulted ceiling?

Should have included the filters on the exhaust & supply grills and the balancing capability at the grills in your video. They are two important factors in your installation. This is the best HRV, ERV installation on the market and I have seen them all.

Hey I have a question? I have a 200 square foot tiny house with closed foam insulation and because I also use it as a greenhouse in the winter time and of course because of transpiration of the plants and evaporation of the soil after a watering… on top of two adult people breathing, I am getting a lot of humidity in the winter time. I also live in the SW Virginia area so we have pretty humid summers here too. Which system would work best for this application and HRV or ERV? I know both clean the air Im just more concerned with excessive humidity. I see a lot of people in tiny houses using HRV but what do you think I should do. Also I am looking for a very small unit… any ideas there because its again only 200 sq ft?

Hello Zehnder. Could you provide a part number for the ground source pre-heater/cooler you would recommend that would be compatible with your Q350?

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Technology on the rise, but placement of vents a consideration with position of warm 'n cool air ...

Thank you for clear presentation, Zehnder US. This has helped my understanding of my new "air recuperation" system being installed in my new house. I have some thoughts & questions. (1) The ventilation box being shown in this video is a huge-sized badass box while my Zehnder box is tiny in comparison and hangs on the wall of a small utility room on the ground floor. Viewers may not realise the size of the unit is depending on the living space of the Passive House (my new house is 2 storeys with 3 bedrooms, main bathroom on upper floor & 1 bedroom, 2nd bathroom, kitchen, open plan living, dining areas, small utility room on ground floor). (2) Zehnder units are certified by Pass House Institute - I can expect the 90% efficiency in its heat recovery rating without any 12% deduction. How does this translate to the 25% heating cost saving, I wonder? I can only image the heat loss via wall, roof, windows accounts for the slide from 90% to 25%. (3) What is the implication of opening a window in the bedroom in my new house, which my strong-willed wife insists that she may want to do so occasionally? This flies against the concept of a Passive House degrading heat recovery, dust filtering etc. in my view but I would you to recommend a good way, explanation to help encourage my wife to avoiding opening any windows. (4) Without the optional fresh air inlet tower & the underground earth heat exchange ducts but a single fresh air intake vent on the external wall on the ground floor (near the utility room), should I need to have any security concerns about malicious access to the single fresh air intake vent by would-be intruders/burglars?

very helpful

horrible video

thanks for the video, does the unit control the air flow at the same rate for different rooms?

would you still need a fan in the bathroom?

Do you have connections for integrating this into a forced air system?

I recommend conical filters for air valves to keep air ducts clean. You can buy it at @t

One of the things I find in most of the HRV videos is the lack of saying what each individual part is for. For example, there is an exhaust fitting mounted to the ceiling with two ports that are ducted. What are the purposes of those ports. If on is in and the other out, how do they not conflict? I saw a wall fitting - is that supply air? The larger box that shows two 8" ducts? (not sure the size) How are those routed through the roof (and what are the proximity rules?). To see an end to end video explained fully would be refreshing.

Amazing technology

Clear and concise. Thank you

Zehnder, you need to update your video libraries in this area. Have there been any changed to the system in the last 6 years? I want to use one of these in Minneapolis for a new build.

Number one - Amazed that nobody has left a comment ! . . . My thoughts are that this was extremely well presented with clearly defined information . Thank you very much .

it's a pipe dream

Wondering if these will work at 100V 60Hz in Japan?

wait a second.... 90% efficiency does not mean you retain 90% of your heat! A 100% efficient HRV with 70F inside, and 0 F outside, gives you fresh air temp of 35F! Exhaust is also 35F...because it attempts to equalizes intake and exhaust temps. In the same scenario, a 90% efficient HRV results in 31.5F fresh air, and 38.5F exhaust air. This ain't magic...just physics!

nice, complete, system and components...

Condensing dryer = problem solved

I'm building a slab on grade house in northern Quebec. where can I see your product? Thanks

i live in middle east .. summer it reach 55 degrees outside and around 46 in shade .. can this system help cool down the house and how much

where can i buy this system in Quebec Canada?

what is cost for that system?

Do they sell Daikin in the USA?

your system is great. with the installation of preheater, what is the lowest temperature it can handle. I live in Ontario and I want to know if I need additional heater system.

Mr. G. Thompson: - My architect husband and I hope that Zehnder folks have a serious educational program- besides CEU from AECDaily- to bring the Building Depts. (and like)- up to their technology. The construction industry is very conservative in our country. Thank you for bringing these issues to the manufacturer's attention.

this is what I tried to explain to the feds. they didn''t have a clue what I was talking about. gt

@homeheatrecovery I guess that's where the Fein tool (high frequency oscillating tool) came in. I was also wondering about the clean cut without damaging the drywall. Would creating a "cutting guide" (piece of plywood, thickness of the drywall) with a hole the size of the supply/extract pipe come in handy? One could cut the metal, then plug it backup with the cover before the drywallers come in.

what tool do you use to get a good flush finish without damage to the plaster when cutting off the excess metal duct at diffuser conection