Business Details
Expert Passive House Design & Consulting Services
Mainstream Corporation is a Colorado-based Passive House Design and Consulting firm with over a decade of experience in green building solutions. We specialize in creating high-performance buildings that prioritize energy efficiency, indoor air quality, and thermal comfort through innovative design and advanced materials. Our services include Passive House certification, airtight envelope systems, energy recovery ventilation, and comprehensive consulting for residential and commercial projects. We leverage cutting-edge technologies like Zehnder air purification systems and Pro Clima air barrier solutions to deliver sustainable, cost-effective results.Our team has successfully completed landmark projects such as the Nantes Public Library, a model of energy efficiency that uses 60% less energy than code-built structures. By combining rigorous energy modeling with practical construction expertise, we help clients achieve net-zero goals while maintaining operational simplicity and long-term durability. Our commitment to environmental stewardship is reflected in every aspect of our work, from material selection to system design, ensuring buildings that are both eco-friendly and occupant-focused.
Services
Passive House Design
Air Barrier Systems
Ventilation Consulting
Energy Recovery Units
Building Commissioning
Airtight Envelope Installation
Passive House Certification
Heat Recovery Ventilation
Thermal Bridge Mitigation
Green Building Consultation
Highlights and features
- We have over a decade of expertise in Passive House Green Building techniques.
- Our team provides certified energy-efficient building solutions with measurable savings.
- We specialize in airtight envelope systems that reduce energy loss by 50%.
- Our Zehnder ventilation systems recover 90% of wasted heating/cooling energy.
- We deliver buildings with superior indoor air quality and thermal comfort.
Services
Passive House Design
We create certified Passive House structures using advanced energy modeling and high-performance materials. Our designs reduce energy consumption by up to 90% while maintaining superior comfort. Services include thermal bridge elimination, airtight envelope planning, and net-zero energy calculations for residential and commercial projects.
Air Barrier Systems
Our Pro Clima air barrier systems achieve 3x tighter performance than code requirements. We implement vapor-open membranes and permanent bonding tapes for dust-free, energy-efficient buildings. Solutions include detailing red-line layers, sealing penetrations, and providing 100-year durability for all construction types.
Energy Recovery Ventilation
Zehnder-certified ventilation systems recover 90% of energy while delivering filtered fresh air. We design whole-building purification systems that reduce heating/cooling loads by 50% compared to standard bathroom fans. Solutions integrate with airtight envelopes for asthma-friendly indoor environments.
Building Commissioning
We perform multi-stage quality assurance including blower door tests and ventilation balancing. Services cover thermal imaging, envelope inspection, and system verification to ensure compliance with Passive House standards during construction phases.
Thermal Bridge Mitigation
Our engineering team identifies and eliminates thermal bridges through advanced framing analysis. We implement continuous insulation strategies and specialized materials to prevent heat loss, ensuring optimal energy performance in wall, roof, and floor assemblies.
People
Kelly Dietman
Energy Architect
Certified Passive House designer with 15+ years of experience in net-zero energy modeling and sustainable construction. Specializes in integrating high-performance systems with practical building science for residential and commercial projects.
Questions
What is Passive House certification?
Passive House certification is a rigorous energy efficiency standard requiring buildings to meet strict criteria for thermal performance, airtightness, and energy recovery. Certified buildings use up to 90% less energy for heating and cooling.
What services do you offer for residential projects?
We provide whole-building solutions including airtight envelope design, ventilation system planning, thermal bridge analysis, and Passive House certification support for custom homes and ADUs.
How can I request a project quote?
Visit our website's 'Request a Quote' page or contact us directly at 303-912-4833. Our team will analyze your project requirements and provide a detailed cost estimate.
Do you serve areas outside Colorado?
While based in Colorado, we offer consulting services nationwide through virtual collaboration tools. On-site services are available for Colorado projects within 200 miles of Berthoud.
What ventilation systems do you recommend?
We specialize in Zehnder ComfoAir units, which provide 90% energy recovery efficiency while maintaining superior indoor air quality through dual-stage filtration systems.
Can you retrofit existing buildings to Passive House standards?
Yes. We offer retrofitting solutions that include envelope upgrades, thermal bridge repairs, and installation of high-efficiency ventilation systems to significantly improve energy performance in existing structures.
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Reviews (4)
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
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
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
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
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.
