I love my Zehnder ERV’s. Our house had significant issues with VOC’s and odors. We tried two other brands and they either did not move enough air or were incredibly noisy. I eventually found the Zehnder’s and they have finally fixed our problem. They are quiet and powerful. Thank you so much for making such a wonderful product.

Todd Stiefel

While buying and installing this system has been a significant learning curve and expense, we’ve certainly seen improvement in my and my daughter’s allergy issues. So, we’re delighted we did it. And, after all of the research I did, I’m glad we went with the Zehnder. Aside from being far ahead of other units out there, it’s great to work with a company that stands behind its products and offers such great support.

Jaime Kahn

We consistently choose Zehnder ERVs for their high efficiency, very quiet operation, and ease of ducting with Comfotube. No other system that offers these features.


Our carpenters install the units and ductwork, saving time and money over hiring an HVAC contractor.


The technical sales people and field technicians at Zehnder offer great service, knowledge, and hands-on asistance from the initial design though final commissioning.

Alan Gibson, G O Logic LLC

At Ryall Sheridan Architects, Zehnder is our go-to energy recovery ventilation system for all of our projects.  We’ve used the Comfoair units in all sizes on residential and institutional projects and had nothing but good results.  On our most efficient net-zero and Passive House designs, the Zehnder system with the Zehnder commissioning is the surest way we’ve found to have efficient, quiet and easy to maintain systems– with great indoor air quality.

Ryall Sheridan Architects

Ventilation and indoor air quality are too important to leave to inferior systems. Zehnder ERVs have become our go-to solution for excellent indoor air quality. The ERVs’ thermal and electrical efficiency, exceptionally quiet operation, and inherently air-tight distribution system satisfy everything we’re looking for in a ventilation system.

Jordan Goldman, Zero Energy Design

I chose a Zehnder ERV for my own zero net energy retrofit in 2013. In addition to the high quality of the products, I appreciate the responsive support provided by the team at Zehnder America.

Marc Rosenbaum

The products – and just as importantly, technical support – I get from Zehnder are unparalleled. That’s why I continue to spec their products for nearly every project I work on. The efficiency, flexibility, and ease of installation mean that good indoor air quality is virtually guaranteed.

Cramer Silkworth, Baukraft Engineering PLLC

Zehnder fresh air systems allow us to deliver the best indoor door climate for our clients regardless of the scale of the project.  We selected a Zehnder Comfoair system for our architecture office and it is the centerpiece of the healthy conditions we work in.  Our clients often comment about the comfort of our work space.

Richard Pedranti, Architect

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Jay Clementi, owner of Steeplechase Builders

“We selected the Paul by Zehnder for this 1st Internationally certified Passive House Project in Canada because of its outstanding quality, highest efficiency and ease of operation as the market leader in North America. Zehnder was extremely helpful with planning and implementing the system also ensuring that it works as intended.”

Alexander Maurer, Managing Director, Marken Projects, Vancouver, BC

“With Zehnder, I was provided everything I need from the unit to the tubing to the accessories for a smooth installation of the system. It’s a good feeling when you order a product that performs as well as advertised.”

Danny Barnhart, Homeowner, Bellvue, CO

“The Zehnder system allows us to install a high quality balanced and distributed ERV/HRV solution without the need to install large soffits or chases.  This systems ducts fit nicely in a 2 x 4 wall, and operate using very low energy, actually exceeding the Passive House requirements for energy use.”

Brandon Weiss, Owner, Weiss Building and Development LLC, Chicago, IL

“With Zehnder’s HRV, you know that you have a well-engineered system to provide continuous fresh air. Zehnder offers great support throughout including commissioning so that the builder can be confident specifying Zehnder in future projects.”

Allen Gilliland, One Sky Homes, Owner, San Jose, CA

“We chose Zehnder HRVs for the Hollis Montessori Passive House School because of its great combination of high efficiency, low noise, and adaptable controls. The demand-controlled ventilation option allows us to automatically vary the ventilation rate based on the occupancy of the classroom”

Jordan Goldman, Engineering Principal, ZeroEnergy Design, Boston, MA

“For TerraHaus we needed an HRV to be as efficient as possible in order to meet the passive house standard for annual heating demand. The Comfoair 550 had the required capacity for this residence hall with 10 occupants, and the Zehnder tubing system made the installation easy without altering framing or building chases.”

Alan Gibson, Principal, G O Logic LLC, Belfast, Maine