Featured Article

CERV2 Installed in Equinox House!

Ty installed a CERV2 (second generation CERV) in Equinox House over the holidays. The “old” first generation CERV, installed in Equinox House in 2010, works just fine, but we’d like to demonstrate many of the CERV2’s amazing features. And, we’re curious to see what a 10 year old CERV looks like inside. It looks great (see photos below)! The “old” heat pump (unit number 002…..CERV unit 001 went to a beautiful certified Passive House in Denver) is not done yet. It is going to a very nice home for many more years of operation.

Future articles will discuss CERV2 operation and our ever expanding, advanced features. Zone dampers (Equinox House now has 10 dampers with 5 supply and 5 return zones), CERV2 control of two ductless minisplits (using our CERV-RC, CERV-Remote Control), and an array of distributed wireless sensors and actuators that automate the management of health and comfort while removing your stress and relieving your worry over your home’s environment. And, with our industry first OTA (Over-the-Air) upgrading, your CERV2 never goes out of date!

If you are a first gen CERV owner who would like to update to a CERV2, contact us to find out about our special CERV2 offer. And to all of our readers, we appreciate your continuing support of our mission to create a healthy, comfortable, and sustainable home environment for all!

Equinox House gen 1 CERV heat pump unit installed in 2010. Not bad for 10 years of operation!

Equinox House’s 1st gen CERV heat pump was originally installed in a prototype housing in 2009, and installed in Equinox House in 2010. The “sealed system” heat pump was removed from the prototype housing and re-installed in a “UL” listed housing in 2013 when Build Equinox first entered the fresh air ventilation market. CERV unit 001 went into a wonderful, high performance certified Passive House in Denver.

Bright metal surfaces on the 1st gen CERV’s heat exchangers indicate good air filtration and air flow, and long life for you and your CERV! A common cause of heat pump and air conditioning system failure in modern homes is “formicary corrosion”, a build up of formic acid in condensate in air conditioning and dehumidification systems due to high formaldehyde concentration in homes with insufficient fresh air and poor selection of formaldehyde infused building materials and furnishings. CERV and CERV2 units protect your air conditioners and your lungs!

New CERV2 installed in Equinox House. Note air distribution plenum above the CERV2 with 5 supply zone dampers. Uninsulated ducts and small plastic tubing is due to Ty conducting a series of measurements for a future article on air flow, pressure drop, and zone control. In addition to installation of the CERV2, distribution ducts have been increased to larger diameters for increased air flow with lower pressure drop. Read our Ductology reports to learn more about economically optimized duct design and duct system performance; your health and comfort depend on an efficient air distribution system!

Cold temperatures on January 27, 2021 don’t affect Equinox House’s ability to keep air fresh with comfortable temperature and humidity. Unlike conventional HRV and ERV technologies, CERV2 units do not need “frost” protection with inefficient electric pre-heaters or reduced fresh air flow. In fact, CERV2 units turn frost into heat for your home! You don’t have to take our word about the CERV2’s performance. See live data and control screen information on the Build Equinox homepage (see “Take Control”). Note: Ty’s Covid vaccination sticker; his old age made him eligible for his shot on January 27.

It’s cold outside in central Illinois, with temperatures dipping into the teens over the past week, but Equinox House stays steady at 68 to 70F all day long in all weather with its two 1 ton Mitsubishi hyper heat ductless minisplit heat pumps. Remember, two 1 ton minisplit heat pumps operating at half capacity are more efficient than a single unit operating at full capacity! Read our articles and reports to find out why.

Fresh air should never be sacrificed because outdoor temperatures are too cold or too hot and humid! Your health is much more important than energy, but the good news is that you can have your cake and eat it, too. Health and comfort impact your well-being and productivity, and CERV2 smart ventilation technologies automatically maintain both in energy efficient manners. Read our reports on Smart Ventilation and Smart Air Distribution to find out why.

A frequent problem in northern climates is excessively dry indoor air that inflames skin, causes nosebleeds, irritates breathing passageways, and creates a thriving environment for respiratory viruses. Smart ventilation, in properly designed homes like Equinox House, naturally maintain healthy humidity levels during cold weather with indoor relative humidity at 40 to 50% in late January with no humidification! Learn more about moisture management in all climates by reading our 4 part moisture management reports, and follow the stories of three contractors; Contractor Loose, Contractor Tight, and Contractor Smart.

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September 30, 2021 Events – PHIUScon 2021 Presentation: Human Centric Metrics for Improving Health, Comfort and Productivity 20210930
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May 18, 2021 Featured Article – Alexa, Meet the CERV 20210518
April 19, 2021 Spotlight – Illinois ADAPTHAUS Wins 1st Place in Comfort & Environmental Quality 20210419
April 19, 2021 Events – Register for Building Energy Boston (Online)! May 5-7 20210419
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April 19, 2021 Events – Upcoming Online Webinars and Conferences! 20210419
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March 10, 2021 Spotlight – CERV Installed in the UofI ADAPTHAUS 20210310
March 10, 2021 Events – Re-Opening Schools and Beyond Safely Webinars (3/23, 4/21, 4/22) 20210310
March 10, 2021 Featured Article – Human Value: Thinking Beyond Energy 20210310
February 26, 2021 Spotlight – Dar-Lon Chan’s Journey to Sustainable Living 20210226
February 26, 2021 Featured Article – Covid Safe Space Calculator 20210226
January 29, 2021 Events – Efficiency Vermont Better Buildings by Design Conference (Feb 2-4) 20210129
January 29, 2021 Spotlight – University of Illinois ADAPTHAUS becoming Reality 20210129
January 29, 2021 Featured Article – CERV2 Installed in Equinox House! 20210129
December 21, 2020 Spotlight – Tour Bill Spohn’s New Modular Net Zero Home (CEUs available!) 20201221
December 21, 2020 Special Edition – Ventilation, Vaccination, Infection, and Luck. Covid-19 and the New Year 20201221
December 21, 2020 Featured Article – AWE: Air, Water, Energy 20201221
November 17, 2020 Events – CERV2 Smart-er Ventilation Product Demo (Video + PDF) 20201117
November 16, 2020 Spotlight – New Lungs for a 101-Year-Old Home Pt.3: Heat Pump Water Heater! 20201116
November 15, 2020 Featured Article – Equinox Meets the Needs / ASHRAE Solar ZEB Article 12 20201115
November 12, 2020 Special Edition – Stay Safe this Holiday Season! 20201112
October 29, 2020 Spotlight – New Lungs for a 101-Year-Old Home Pt.2: Total HVAC Replacement! 20201029
October 28, 2020 Featured Article – Equinox House Performance / ASHRAE Solar ZEB Article 10 20201028
September 22, 2020 Events – Michigan Residential Net Zero Energy Conference (Oct 20-22) 20200922
September 22, 2020 News – CERV-UV Now Available for New Orders! 20200922
September 22, 2020 News – CERV-ICE Now in the iOS and Android App Stores! 20200922
September 22, 2020 Featured Article – Solar Collection & Use / ASHRAE Solar ZEB Article 10 20200922
August 17, 2020 Special Edition – Build Equinox Groundbreaking Research into COVID 19 20200817
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August 17, 2020 Featured Article – Comfort Conditioning & Indoor Air Quality / ASHRAE Solar ZEB Article 9 20200817
August 17, 2020 News – Building Science Podcast: “Ventilation & Virus Transmission Prevention” 20200817
August 14, 2020 News – New HVAC School Podcast: “Advanced Ventilation w/ CERV2” (Watch/Listen) 20200814
August 12, 2020 Events – Free CEU Webinar: Can Building Science Help Us Slow COVID-19? (Sep 2, 2020) 20200812
July 10, 2020 Tech – Ultimate Ultraviolet! 20200710
July 10, 2020 Special Edition – Covid-19 Update: Airborne Means AIRBORNE! 20200710
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June 25, 2020 Featured Article – Designing a Thermally Massive Home/ASHRAE Solar ZEB Article 7 20200625
June 25, 2020 Special Edition – Covid19 Status Report: We are at the Beginning of the Pandemic, Not the End 20200625
May 29, 2020 Spotlight – CERV Retrofit: New Lungs for a 101-Year-Old Home 20200529
May 29, 2020 Special Edition – Covid19 Status Report: Guidelines for Homes & Businesses 20200529
May 29, 2020 Featured Article – Ground Heat Transfer/ASHRAE Solar ZEB Article 6 20200529
April 16, 2020 Events – Free CEU Webinar: Covid-19 Characteristics, Transmission, and Control (April 29th) 20200416
April 16, 2020 Special Edition – Battling the Spread of Covid-19 20200416
April 16, 2020 Featured Article – Infiltration & Sealing/ASHRAE Solar ZEB Article 5 20200416
April 16, 2020 Spotlight – New Projects: 1930s CERV Retrofit & Mitsubishi Hyperheat 20200416
March 13, 2020 Featured Article – Light and Delight/ASHRAE Solar ZEB Article 4 20200313
March 10, 2020 News – CERV Voted One of the Top 16 Coolest Things Made in Illinois! 20200310
March 5, 2020 Special Edition – Fighting COVID-19 with Fresh Air 20200305
February 24, 2020 Featured Article – Walls and Roof/ASHRAE Solar ZEB Article 3 20200224
February 24, 2020 Tech – Magic-Box Mechanicals 20200224
February 24, 2020 Events – Designing Exceptional Homes for Exceptional People Webinar (Video + PDF) 20200224
January 30, 2020 Events – Visit us (Booth 17) at Energy Design Expo in Duluth (2/25-26) 20200130
January 14, 2020 Tech – Designing Exceptional Homes for Exceptional People 20200114
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December 19, 2019 Events – Free Webinar: Smart Ventilation & Air Distribution (Video+PDF) 20191219
December 19, 2019 Events – CERV2 Smart-er Ventilation Product Demo (Video + PDF) 20191219
December 19, 2019 Spotlight – Acorn Glade: 2019 NAPHC Awardee! 20191219
December 16, 2019 Featured Article – Equinox Origins/ASHRAE Solar ZEB Article 1 20191216
November 19, 2019 Events – Visit our booth at 2019 NAPHC in Washington DC! 20191119
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November 19, 2019 Featured Article – Handling Humidity Pt.4 Putting it All Together 20191119
October 16, 2019 Events – Mechanical Systems for Passive Buildings (Chicago, Oct 16) 20191016
October 16, 2019 Featured Article – Handling Humidity Pt.3 Methods for Managing Moisture 20191016
October 16, 2019 Events – Free Webinar: Handling Humidity (Video + PDF) 20191016
October 16, 2019 Events – Free CEUs: Building Green & Beer at Founders Brewing (Oct 28) 20191016
October 16, 2019 Spotlight – Inter House Wins Solar Decathlon Africa!!! 20191016
September 20, 2019 Featured Article – Handling Humidity Pt.2 Climate Moisture Variations 20190920
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September 20, 2019 Tech – From CERV to CERVEZA: a Quest for Smart Beer 20190920
August 27, 2019 Events – Earn Free CEUs with the Handling Humidity Webinar (Aug 29) 20190827
August 27, 2019 Featured Article – Handling Humidity Report Series 20190827
August 12, 2019 News – Listen to the Building HVAC Science Podcast, ft. Ty Newell! 20190812
July 29, 2019 Events – CERV2 Smart-er Ventilation Product Demo (Aug 27, 2019) 20190729
July 29, 2019 Featured Article – Poor Home Maintenance = Increased Health Risks 20190729
July 29, 2019 Tech – Say Hello to Our New Server! 20190729
June 19, 2019 Featured Article – Watch out for Cranky Heaters! 20190619
June 19, 2019 Events – Free CEU Webinar: Smart Ventilation & Air Distribution (July 10) 20190619
June 19, 2019 Spotlight – Marrakech Express! CERV2 Heading to Africa! 20190619
May 13, 2019 Featured Article – Taylor Home CERV Testimonial 20190513
May 13, 2019 Events – 7 Steps for Designing an Economical Net Zero Home (Video + PDF) 20190513
May 13, 2019 Tech – AeroBarrier Demonstration 20190513
April 15, 2019 Events – Indoor Air Quality Metrics Free Webinar (Apr 24, 2019) 20190415
April 15, 2019 Featured Article – CERV2 Geo–Boost 20190415
April 15, 2019 Review – 2019 National Home Performance Conference 20190415
April 15, 2019 Tech – CERV2 Sketchup Model Now Available 20190415
March 28, 2019 News – Visit us at the Chicago 2019 National Home Performance Conference 20190328
March 28, 2019 Featured Article – Happy Equinox, St. Patrick’s Day, and Super Moon! 20190328
February 27, 2019 Events – Free CEU Webinar: Smart Ventilation & Air Distribution (Mar 12) 20190227
February 27, 2019 Featured Article – Smart Ventilation and Smart Air Distribution Reports 20190227
February 27, 2019 Spotlight – El Salvador NZEB Update 20190227
February 25, 2019 Events – CERV2 Smart-er Ventilation Product Demo (Video + PDF) 20190225
January 22, 2019 Events – Smart Ventilation & Smart Air Distribution Webinar (Video & PDF) 20190122
December 26, 2018 Spotlight – Progressive Canada 20181226
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December 26, 2018 Review – CERV2 at Greenbuild 2018 20181226
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November 19, 2018 News – Check Out Our Social Media! 20181119
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June 22, 2018 Featured Article – Mini-split Mania! 20180622
April 30, 2018 News – Now offering on-demand webinars for CEUs! 20180430
April 30, 2018 Events – Free CEU Webinar! (May 2, 2018) 20180430
April 30, 2018 Featured Article – Ductology Part 2 20180430
February 19, 2018 Review – 2018 Better Buildings by Design Conference, Flu and Colds 20180219
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January 22, 2018 Events – Visit us at BuildingEnergy Boston! (March 7-9, Boston, MA) 20180122
January 22, 2018 Events – Efficiency Vermont Better Buildings by Design Conference (Feb 7-8) 20180122
January 22, 2018 Featured Article – Ductology (Part 1) 20180122
November 20, 2017 Featured Article – Heat Pump (Hybrid) Clothes Dryers are Coming! 20171120
October 31, 2017 Featured Article – CERV2 Measures IAQ at NAPHC & NAPHN 20171031
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August 21, 2017 Events – Free CEU Webinar! (Sep 27, 2017) 20170821
August 21, 2017 Featured Article – Quiz 20170821
July 27, 2017 Events – New IAQ Metrics Webinar (Video + PDF) 20170727
July 25, 2017 Featured Article – Endotoxins: Small But Very Significant 20170725
May 22, 2017 Events – Economical Net Zero Design Webinar (Video+PDF) 20170522
May 22, 2017 Featured Article – Styrax Japonicus 20170522
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September 28, 2016 Events – Free CEU Webinar (Oct 5th): Why are new Indoor Air Quality metrics needed? 20160928
September 28, 2016 Review – 2016 North American Passive House Conference 20160928
September 28, 2016 Featured Article – New CERV-ICE IAQ Analytics Released! 20160928
September 28, 2016 Spotlight – CERVs in Passive Homes, pt. 2 20160928
August 18, 2016 Featured Article – Understanding the House as a System 20160818
August 18, 2016 Spotlight – CERVs in Passive Homes 20160818
August 18, 2016 Review – “What is IAQ?”, P. Ole Fanger 20160818
August 18, 2016 Tech – CERV CO2/VOC Library 20160818
July 19, 2016 Events – September North American Passive House Conference 20160719
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July 18, 2016 Featured Article – VERMOD CERV Report Released 20160718
July 18, 2016 Review – LBNL report: “Houses are Dumb Without Smart Ventilation” 20160718
July 18, 2016 Spotlight – Professor P. Ole Fanger (1934-2006); IAQ and Comfort Pioneer 20160718
July 18, 2016 Tech Note – Airflow Calculation for Ventilation Systems 20160718
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