MainStream
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Fresh Air is filtered through the Zehnder fresh air ventilation system and distributed for interior health, all the while incorporating heat recovery from the exiting air. Experience a draft-free and radiantly-comfortable environment, in your own home! We are breaking thermal bridges, adding extreme air-tightness, and providing unmatched interior comfort.

Our Envelope Specialties allow for a reduced heater altogether, and a NET-ZERO result with less than half the normal PV system! MainStream has over 10 years practice in Passive House Green Building. Passive House is the easiest path to calculating and specifying off-grid, Zero Net Energy buildings of all shapes and sizes.

Passive House is the only global industry of energy builders, modelers and experts studying the accuracy of actual performance. If you want to design a building with accurate predictions of real energy usage, you'll want to use Passive House energy models and professionals. Replace bathroom fans with nearly silent Zehnder whole building purification systems.
Services
Integrated Design, Envelope Optimization and Specs, Passive House Certification and Feasibility Studies, & QA during Construction. Before a project ever obtains funding, there is an intense period of time where usually the Owner or Investors start visioning the purpose and solution the building will present.
This means makeup air needs to be added to keep the bad stuff (Radon, Garage VOCs, dust, Attic insulation Particulates etc.) out of the building when using a clothes drier, a bathroom fan or range hood. Replacing the bathroom fans with our ERV systems can save up to 90% of the heat leaving your building!
Passivhaus, aka Passive House in America, is a science based standard and energy model that balances passive solar, super insulation, air tightness, fresh air and heat/energy recovery, and the thermodynamic performance of a building to reduce typical building heat loads by 90%.
MainStream Corporation Return Policy Replacements & Shipping Inaccuracies Original Quality: means original packaging with all the paperwork and tools. The day shipments arrive: carefully review the packing slip and compare it to your payment invoice. Report any discrepancies within 10 days for free shipping.
The optimum operation of Zehnder ComfoSystems heat recovery ventilation systems requires proper design, installation and commissioning of these systems. The final step in this process is the commissioning or QA (quality assurance) of your system. Zehnder America, Inc., with qualified and trained staff or QA agents of the US and Canada, provides commissioning services for builders and homeowners who have installed our complete ventilation systems.
Reviews (9)
Amanda Poindexter
Amanda Poindexter
May 27, 2021
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We are currently building own home and Cody has been instrumental in helping us with the details and building assembly options. I sent in my plans and the red lines returned were quite helpful. He helped to design the ventilation systems as well as help with many details and assemblies to consider with my budget.
Cody and Lisa's experience with building passive houses enables them to know what works, what doesn't, and what levels of insulation / air tightness, etc. need to be at to build a superior home. I highly recommend Cody, Lisa and Mainstream Corporation for all of your design and build
John Sarter
John Sarter
Feb 02, 2021
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Cody and his team are extremely knowledgeable and helpful and have helped me immensely in my high performance building development, Sol Lux Alpha.
Jay Herrmann
Jay Herrmann
Dec 22, 2020
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Definitely exceeded my expectations!! Cody was an excellent resource from concept through commissioning. He has been easily accessible via phone and email and I needed that since I installed the system myself. He is an easy guy to work with and is a true expert on the topic. The Zehnder equipment and accessories are extremely high quality. The ERV has dramatically improved the air quality in our home. We don't wake up congested any more, smells dissipate quickly and even our radon levels have dropped. Working with Mainstream to design, purchase and install the ERV system was an excellent decision
Rick Pratt
Rick Pratt
Dec 03, 2020
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We are just beginning the process of getting Cody's help with designing our new Passive House. We intend you hire him to support our efforts throughout the process. Even though it's early in our working relationship I feel compelled to provide an early review because he has provided so much valuable information right from the beginning. If you are interested in building a High Performance Home start here with MainStream Corp and Cody Farmer.
Since we wrote this review we have spent many hours working with Cody & Lisa while designing our near Passive House. They have worked very hard to meet my
Tim Sharpton
Tim Sharpton
Nov 17, 2020
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Great experience. Liked having a remote commissioning option with Cody!
Brian Abbott
Brian Abbott
Oct 12, 2020
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Working with Cody and Lisa and the Mainstream team was a game-changer for our DIY off-grid build. From air-sealing products and membranes to walking us through the components and installing our Zehnder ERV, they patiently journeyed alongside us until we crossed the finish line.
Right after we crossed that finish line, the Cameron Peak Fire raged through our mountain community. Unfortunately, seventeen of our neighbors lost their homes. Ash and smoke pummeled our house for weeks during the fire. We had to evacuate for eleven days at the height of the activity. I fully expected the place to have
Jason Spisak
Jason Spisak
Jun 25, 2020
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Incredibly knowledgeable, understanding, and helping folks do right by the planet. You won't find a better team than Cody and friends. I needed some high performance air sealing tape for a project and they had just what I needed and shipped it immediately. Their attention to the details that matter will give you confidence to take on the project of your dreams. Mainstream is becoming a go to for carbon neutral living projects supplies and consulting, and they live up to their reputation. Solid all the way around.
Terry Blevins
Terry Blevins
Nov 19, 2019
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Had a unique requirement and, after hours of searching the internet, found a solution at MainStream.
The quality of the port diffuser box I ordered exceeded my expectations with the quality of the piece and hardware supplied. The shipment not only included the connections for 3 ports (as advertised) but also contained an adjustable mounting bracket with a detailed installation/mounting instructions booklet. Very impressed.
Kathy Wolking
Kathy Wolking
Oct 20, 2019
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Extremely knowledgable owners. They're always prompt and courteous and willing to help.