BACK
What’s the Scoop on PM10 and PM2.5 Particles?
The VOCs Lurking Under Your Customersโ Sinks (and In Many Other Spots)
What Makes a Thorough Comfort Consultation
HRVs and ERVs in Commercial Buildings
Solving Comfort and IAQ Issues in a Vintage Home: A Case Study
Ventilation, Filtration, and Humidity Control: The Holy Trinity of IAQ
Four Ps of IAQ
UV Lights
Premature Coil Failure in Ductless Mini-Splits & VRF Equipment – Short #303
The Ethics of IAQ โ Testing vs. Remediation Conflicts – Short #301
The MERV 15 Filtration Physics – Short #300
Outdoor Air & Ventilation Strategies with John Semmelhack, Ty Branaman & Tim De Stasio
Filters – MERV 13, Myths & More
IAQ for the HVAC Technician w/ Brynn Cooksey
IAQ, Ethical Selling & Building Better Techs w/ Brynn Cooksey
ERVs – What You Need To Know w/ Dr. Bailes
Healthy Air Supplements vs. Pillars w/ Kevin Hart
Roundtable Discussion: Why HVAC is Failing to Address the Sick Home Epidemic
A Layered Approach to Indoor Air Quality
#IAQ
Tech Tips:
MATLAB Handle Graphics It was December 5th, 1952, only seven years after the end of WWII, in London, England, when the “Great Smog” settled across the city. The “great smog” was the result of a meteorological anomaly combined with unchecked industrial pollution. Still, even once it settled on the city, bringing business to a screeching […]
Read more
In HVAC, we have a few infamous indoor air quality monsters that bring terror to our customersโ homesโgases, particles, and organisms that wreak havoc on indoor air quality (and may contribute to moderate to severe health problems). The big one is carbon monoxide (CO), which we all know is deadly. Although not deadly by itself, […]
Read more
This tech tip is based on an HVAC School podcast episode with Tim De Stasio. Tim has written several articles about HVAC design on his blog, several of which he has been generous enough to share with HVAC School. Timโs focus is on humid climates, and moisture mitigation is one of his main focuses in […]
Read more
This tech tip is based on a presentation by Joey Henderson, a veteran symposium speaker and excellent HVAC educator. You can learn more about Joey and the work he does at joejoehvac.com and his YouTube channel HERE. We recently published a tech tip about economizers as a means of bringing fresh air into commercial buildings. […]
Read more
This tech tip is a recap of the Santa Fe Dehumidifiers and Comfort Dynamics, Inc. case study about a 1941 vintage home in Miami, FL. You can listen to the podcast about that case study by clicking the play button below, and you can read the case study at https://hvacrschool.com/case-study. Special thanks to Nikki Krueger […]
Read more
At the time of the publication of this article, COVID-19 (coronavirus) is spreading across the world at an alarming rate, and many people have self-quarantined to help slow or stop the spread of the virus. These precautionary measures are prudent and responsible. However, with the increased amount of time people spend inside their homes, there […]
Read more
The Four Ps of IAQ Iโm not the first, second, or probably even the thirty-second person to write about improving indoor air quality problems using the four Ps approach. Itโs a well-known thought process in the building science communityโnot sure if thatโs the case in HVAC circles. The first P is for pollutants. In this […]
Read more
A quick note about UV lights: they work like sunlight in that they prevent and kill many types of bacteria and fungi when exposed to the light on surfaces. They do not generally do a great job of killing spores suspended in the air stream. UV lights are great at killing yucky stuff on surfaces […]
Read more
Videos:
Podcasts:
๏ปฟ๏ปฟ In this short podcast, Bryan and Roman discuss premature coil failure in ductless mini-splits and VRF equipment. These coils are susceptible to a few different types of corrosion. Warmer coil saturation temperatures and shorter runtimes result in lower latent capacity; whatever moisture is on the coil dries on the coil instead of draining out. […]
Read more
๏ปฟ๏ปฟ In this short podcast episode, Bryan and Roman talk about the ethics of IAQ, particularly in terms of microbial growth testing vs. remediation conflicts, based on Roman’s recent experience hiring a mold assessor and then a remediation expert in his home. Remediation is governed by S520 of the IICRC. Microbial growth is tricky because […]
Read more
๏ปฟ๏ปฟ In this short podcast episode, Bryan and Roman Baugh talk about indoor air quality and microbial control, specifically MERV 15 filter physics and how it all works when bringing in outdoor air. We filter indoor air to keep dust and particles off the equipment and keep them from circulating through the air. However, we […]
Read more
๏ปฟ๏ปฟ In this live-stream episode, Bryan is joined by Tim DeStasio, John Semmelhack, and Ty Branaman for a deep dive into residential ventilation โ the often-overlooked โVโ in HVAC. The group opens with quick life updates before launching into a wide-ranging conversation covering the three core ventilation strategies (circulation, extraction, and dilution), how tight home […]
Read more
๏ปฟ๏ปฟ In this episode of the HVAC School Podcast, Bryan sits down with Kelsey Hei and Andy Fox from 3M Filtrete to pull back the curtain on what really goes into a quality air filter. Most homeowners โ and even some contractors โ think of air filters as simple screens that catch dust, but as […]
Read more
๏ปฟ๏ปฟ In this episode from the 6th Annual HVACR Training Symposium, Brynn Cooksey, a home performance contractor from Michigan and technical training business owner, reveals how indoor air quality (IAQ) testing transformed his contracting business from a commodity service into a profitable specialty. Cooksey shares his proven methodology for turning IAQ into an “instant profit […]
Read more
๏ปฟ๏ปฟ In this episode of the HVAC School podcast, Bryan welcomes back Brynn Cooksey from Air Doctors and HVAC U to discuss critical topics facing the HVAC industry today. Brynn brings his unique perspective as both a successful contractor in southeast Michigan and an industry educator who has made the transition to focusing primarily on […]
Read more
๏ปฟ๏ปฟ In this episode of the HVAC School podcast, host Bryan sits down with building science expert Allison Bailes to dive deep into the world of Energy Recovery Ventilators (ERVs). The conversation explores the critical role of ventilation in modern homes, highlighting how ERVs have become an essential component of maintaining indoor air quality and […]
Read more
๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ๏ปฟ Bryan and Kevin discuss indoor air quality solutions in terms of healthy air supplements vs. pillars of IAQ, drawing an analogy between IAQ supplements like electronic air cleaners and fitness supplements. They talk about why discussing these supplemental products can be controversial since many companies profit from selling them. However, the fundamentals of good […]
Read more
Events:
NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
Read more
NOTE: If you cannot view the recording, the video may still be processing. The maximum wait time is 24 hours. We apologize for the delay and appreciate your patience.
Read more
