# HVAC U

Site tagline

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## Available Content

### Pages

* [Certifications for State Energy Rebate Programs](https://www.hvactrain.com/certifications-for-state-energy-rebate-programs.md)
* [HVAC U Job Board - Get Noticed by Top Employers](https://www.hvactrain.com/hvac-u-job-board-get-noticed-by-top-employers.md)
* [HVAC U Job Board - Hire Skilled HVAC & Building Performance Professionals](https://www.hvactrain.com/hvac-u-job-board-hire-skilled-hvac-building-performance-professionals.md)
* [Building Science Shorts](https://www.hvactrain.com/building-science-shorts.md)
* [Thank You](https://www.hvactrain.com/thank-you.md)
* [Bag Season Podcast](https://www.hvactrain.com/bag-season-podcast.md)
* [My account](https://www.hvactrain.com/my-account.md)
* [Checkout](https://www.hvactrain.com/checkout.md)
* [Cart](https://www.hvactrain.com/cart.md)
* [Shop](https://www.hvactrain.com/shop.md)
* [Employment Inquiry](https://www.hvactrain.com/employment-inquiry.md)
* [Workforce Development Training Inquiry](https://www.hvactrain.com/workforce-development-training-inquiry.md)
* [Contact Us](https://www.hvactrain.com/contact-us.md)
* [Videos](https://www.hvactrain.com/videos.md)
* [Tools](https://www.hvactrain.com/tools.md)
* [Articles](https://www.hvactrain.com/articles.md)
* [Podcasts](https://www.hvactrain.com/podcasts.md)
* [Resources](https://www.hvactrain.com/resources.md)
* [Meet The Air Doctor](https://www.hvactrain.com/meet-the-air-doctor.md)
* [About Us](https://www.hvactrain.com/about-us.md)
* [Privacy Policy for HVAC U, LLC](https://www.hvactrain.com/privacy-policy.md)
* [Home](https://www.hvactrain.com.md)

### Articles

* [6 of the Most Common HVAC Installation Mistakes Killing System Performance](https://www.hvactrain.com/article/6-of-the-most-common-hvac-installation-mistakes-killing-system-performance.md)
* [Calculating Combustion Air For Fuel-Burning Appliances](https://www.hvactrain.com/article/calculating-combustion-air-for-fuel-burning-appliances.md)
* [The Nuts and Bolts of Combustion Testing](https://www.hvactrain.com/article/the-nuts-and-bolts-of-combustion-testing.md)
* [Overcoming Challenges as a Minority Contractor](https://www.hvactrain.com/article/overcoming-challenges-as-a-minority-contractor.md)
* [Indoor Air Quality for the HVAC Technician](https://www.hvactrain.com/article/indoor-air-quality-for-the-hvac-technician.md)
* [Indoor air quality for the HVAC technician Part 2](https://www.hvactrain.com/article/indoor-air-quality-for-the-hvac-technician-part-2.md)
* [Indoor Air Quality or the HVAC Technician Part 1](https://www.hvactrain.com/article/indoor-air-quality-or-the-hvac-technician-part-1.md)
* [Navigating the Heat Pump Jungle](https://www.hvactrain.com/article/navigating-the-heat-pump-jungle.md)

### Awards

* [Imperial Award](https://www.hvactrain.com/award/imperial-award.md)
* [Oakland Together 40 Under 40 Class of 2026](https://www.hvactrain.com/award/oakland-together-40-under-40-class-of-2026.md)
* [Top 40 Under 40 HVACR Professionals 2024](https://www.hvactrain.com/award/top-40-under-40-hvacr-professionals-2024.md)
* [2024 Top 25 Most Influential HVACR Instructor/Trainer](https://www.hvactrain.com/award/2024-top-25-most-influential-hvacr-instructor-trainer.md)
* [Wayburn Wilson CMS Memorial Award](https://www.hvactrain.com/award/wayburn-wilson-cms-memorial-award.md)
* [Top 40 Under 40](https://www.hvactrain.com/award/top-40-under-40.md)
* [2025 Top 25 Most Influential Instructor/Trainer](https://www.hvactrain.com/award/2025-top-25-most-influential-instructor-trainer.md)

### Courses

* [Mechanical Contractor License Prep (State of Michigan) Course](https://www.hvactrain.com/course/mechanical-contractor-license-prep-state-of-michigan-course.md)
* [Journeyman & Master’s Electrician (State of Michigan) Exam Preparation](https://www.hvactrain.com/course/journeyman-masters-electrician-state-of-michigan-exam-preparation.md)
* [Electrical Code Update (State of Michigan) Course](https://www.hvactrain.com/course/electrical-code-update-state-of-michigan-course.md)
* [EPA Section 608 Technician Certification](https://www.hvactrain.com/course/epa-section-608-technician-certification.md)
* [Low GWP Refrigerant Certification](https://www.hvactrain.com/course/low-gwp-refrigerant-certification.md)
* [Heat Pump Water Heaters 101](https://www.hvactrain.com/course/heat-pump-water-heaters-101.md)
* [Gamechanger Heat Pump and Comfort Advisor](https://www.hvactrain.com/course/gamechanger-heat-pump-and-comfort-advisor.md)
* [ACCA Training](https://www.hvactrain.com/course/acca-training.md)
* [Gamechanger Sales Course](https://www.hvactrain.com/course/gamechanger-sales-course.md)
* [BPI Multifamily Building Analyst Certification](https://www.hvactrain.com/course/bpi-multifamily-building-analyst-mfba-certification.md)
* [Building Science Principles Certificate of Knowledge](https://www.hvactrain.com/course/building-science-principles-certificate-of-knowledge.md)
* [BPI Infiltration and Duct Leakage (IDL) Certification](https://www.hvactrain.com/course/bpi-infiltration-and-duct-leakage-idl-certification.md)
* [BPI Healthy Home Evaluator Certification](https://www.hvactrain.com/course/bpi-healthy-home-evaluator-certification.md)
* [BPI HEP Quality Control Inspector Certification (QCI)](https://www.hvactrain.com/course/bpi-hep-quality-control-inspector-certification-qci.md)
* [BPI Energy Auditor Certification (HEP/EA)](https://www.hvactrain.com/course/bpi-energy-auditor-certification-hep-ea.md)
* [BPI Heating Professional Certification](https://www.hvactrain.com/course/bpi-heating-professional-certification.md)
* [BPI Energy Professional All-in-One Certification Package](https://www.hvactrain.com/course/bpi-energy-professional-all-in-one-certification-package.md)
* [BPI Building Analyst Technician Certification (BA-T)](https://www.hvactrain.com/course/bpi-building-analyst-technician-certification-ba-t.md)
* [BPI Building Analyst Professional Certification (BA-P)](https://www.hvactrain.com/course/bpi-building-analyst-professional-certification-ba-p.md)
* [BPI AC/Heat Pump Professional Certification](https://www.hvactrain.com/course/bpi-ac-heat-pump-professional-certification.md)
* [measureQuick Courses Test](https://www.hvactrain.com/course/measurequick-courses-test.md)

### Distinctions

* [KEEA-EEA-NJ](https://www.hvactrain.com/distinction/keea-eea-nj.md)
* [NCCER](https://www.hvactrain.com/distinction/nccer.md)
* [ICAA Member](https://www.hvactrain.com/distinction/icaa-member.md)
* [Grit Foundation](https://www.hvactrain.com/distinction/grit-foundation.md)
* [Building Performance Association](https://www.hvactrain.com/distinction/building-performance-association.md)
* [RSES](https://www.hvactrain.com/distinction/rses.md)
* [IAEI](https://www.hvactrain.com/distinction/iaei.md)
* [BPI Continuing Education](https://www.hvactrain.com/distinction/bpi-continuing-education.md)
* [BPI Test Center](https://www.hvactrain.com/distinction/bpi-test-center.md)
* [Retro Tec](https://www.hvactrain.com/distinction/retro-tec.md)
* [Amply](https://www.hvactrain.com/distinction/amply.md)
* [SEEA](https://www.hvactrain.com/distinction/seea.md)
* [Tru Tech Tools](https://www.hvactrain.com/distinction/tru-tech-tools.md)
* [TEC](https://www.hvactrain.com/distinction/tec.md)
* [Snugg Pro](https://www.hvactrain.com/distinction/snugg-pro.md)
* [Air Advice](https://www.hvactrain.com/distinction/air-advice.md)
* [CEWD](https://www.hvactrain.com/distinction/cewd.md)
* [NESEA](https://www.hvactrain.com/distinction/nesea.md)
* [MEEA](https://www.hvactrain.com/distinction/meea.md)
* [ESCO Institute](https://www.hvactrain.com/distinction/esco-institute.md)
* [NATE Training and Testing](https://www.hvactrain.com/distinction/nate-training-and-testing.md)
* [Certified NMSDC](https://www.hvactrain.com/distinction/certified-nmsdc.md)
* [The Better HVAC Alliance](https://www.hvactrain.com/distinction/the-better-hvac-alliance.md)
* [Upskill HVAC](https://www.hvactrain.com/distinction/upskill-hvac.md)
* [measureQuick](https://www.hvactrain.com/distinction/measurequick.md)
* [ACCA](https://www.hvactrain.com/distinction/acca.md)
* [Pro Contractors Network](https://www.hvactrain.com/distinction/pro-contractors-network.md)

### Guest Speaking

* [BPA Journal](https://www.hvactrain.com/guest-speaking/bpa-journal.md)
* [Voyage Michigan](https://www.hvactrain.com/guest-speaking/voyage-michigan.md)
* [Service Fusion](https://www.hvactrain.com/guest-speaking/service-fusion.md)
* [Energy Circle](https://www.hvactrain.com/guest-speaking/energy-circle.md)
* [Forbes](https://www.hvactrain.com/guest-speaking/forbes.md)
* [ACCA Meet the Trainer](https://www.hvactrain.com/guest-speaking/acca-meet-the-trainer.md)
* [HVAC School](https://www.hvactrain.com/guest-speaking/hvac-school.md)
* [SkillCat](https://www.hvactrain.com/guest-speaking/skillcat.md)

### Podcasts

* [HVAC Contractors Losing Money by Skipping Energy Audits to Close Jobs with Brynn Cooksey Sr, CEM, CMS](https://www.hvactrain.com/podcast/hvac-contractors-losing-money-by-skipping-energy-audits-to-close-jobs-with-brynn-cooksey-sr-cem-cms.md)
* [Profiles In Prosperity- Brynn Cooksey - The Air Doctor](https://www.hvactrain.com/podcast/profiles-in-prosperity-brynn-cooksey-the-air-doctor.md)
* [EP271 Live from NHPC 2026: Where HVAC, Buildings, and People Intersect With Brynn Cooksey](https://www.hvactrain.com/podcast/ep271-live-from-nhpc-2026-where-hvac-buildings-and-people-intersect-with-brynn-cooksey.md)
* [The Air Doctor's Approach to Success with Brynn Cooksey](https://www.hvactrain.com/podcast/the-air-doctors-approach-to-success-with-brynn-cooksey.md)
* [IAQ for the HVAC Technician w/ Brynn Cooksey](https://www.hvactrain.com/podcast/iaq-for-the-hvac-technician-w-brynn-cooksey.md)
* [The Heat Pump Concierge Model: Turning Utility Programs into Install-Ready Jobs](https://www.hvactrain.com/podcast/the-heat-pump-concierge-model-turning-utility-programs-into-install-ready-jobs.md)
* [IAQ, Ethical Selling & Building Better Techs w/ Brynn Cooksey](https://www.hvactrain.com/podcast/iaq-ethical-selling-building-better-techs-w-brynn-cooksey.md)
* [Training That Scales: Behind the Launch of Pro Contractors Network](https://www.hvactrain.com/podcast/training-that-scales-behind-the-launch-of-pro-contractors-network.md)
* [Revolutionizing HVAC: How Pearl Edison Bridges Homeowners and Contractors with Jake Yurek](https://www.hvactrain.com/podcast/revolutionizing-hvac-how-pearl-edison-bridges-homeowners-and-contractors-with-jake-yurek.md)
* [Jim Hinshaw and Jazmine Colson - Reaching the Summit](https://www.hvactrain.com/podcast/jim-hinshaw-and-jazmine-colson-reaching-the-summit.md)
* [Avoid the HVAC Race to the Bottom - With Building Science, Heat Pumps, and Brynn Cooksey](https://www.hvactrain.com/podcast/avoid-the-hvac-race-to-the-bottom-with-building-science-heat-pumps-and-brynn-cooksey.md)
* [Building Science, Better Homes: Transforming HVAC with Brynn Cooksey](https://www.hvactrain.com/podcast/building-science-better-homes-transforming-hvac-with-brynn-cooksey.md)
* [The Comfort Crisis: Why Bigger Isn't Better for Heating & Cooling with Brynn Cooksey](https://www.hvactrain.com/podcast/the-comfort-crisis-why-bigger-isnt-better-for-heating-cooling-with-brynn-cooksey.md)
* [Transforming Homes and Training Minds: The Brynn Cooksey Approach](https://www.hvactrain.com/podcast/transforming-homes-and-training-minds-the-brynn-cooksey-approach.md)
* [What NOT to Do When Electrifying a Home - Brynn Cooksey from Air Doctors](https://www.hvactrain.com/podcast/what-not-to-do-when-electrifying-a-home-brynn-cooksey-from-air-doctors.md)
* [Practical Loads, Ducts and Sales w/ Brynn Cooksey](https://www.hvactrain.com/podcast/practical-loads-ducts-and-sales-w-brynn-cooksey.md)
* [Internal Apprenticeship w/ Brynn Cooksey](https://www.hvactrain.com/podcast/internal-apprenticeship-w-brynn-cooksey.md)
* [Profiles in Prosperity](https://www.hvactrain.com/podcast/profiles-in-prosperity.md)

### Service Categories

* [Workforce Development](https://www.hvactrain.com/service-category/workforce-development.md)
* [Proctoring Services](https://www.hvactrain.com/service-category/proctoring-services.md)
* [Corporate & Group Training Solutions](https://www.hvactrain.com/service-category/corporate-group-training-solutions.md)
* [All Courses](https://www.hvactrain.com/service-category/all-courses.md)

### Services

* [ACCA Courses](https://www.hvactrain.com/service/acca-courses.md)
* [Electrician Apprenticeships](https://www.hvactrain.com/service/electrician-apprenticeships.md)
* [Employer Apprenticeships](https://www.hvactrain.com/service/employer-apprenticeships.md)
* [HVACR Courses](https://www.hvactrain.com/service/hvacr-courses.md)
* [Building Science Courses](https://www.hvactrain.com/service/building-science-courses.md)
* [Business Development Courses](https://www.hvactrain.com/service/business-development-courses.md)
* [Licensing Prep Courses](https://www.hvactrain.com/service/licensing-prep-courses.md)
* [DOE Energy Skilled Courses](https://www.hvactrain.com/service/doe-energy-skilled-courses.md)

### Testimonials

* [Tony Hill](https://www.hvactrain.com/testimonial/tony-hill.md)
* [Jason 2 & Derek](https://www.hvactrain.com/testimonial/jason-2-derek.md)

### Tools

* [Home Insulation Explainer](https://www.hvactrain.com/tool/home-insulation-explainer.md)
* [Tax Credit Product Lookup Tool](https://www.hvactrain.com/tool/tax-credit-product-lookup-tool.md)
* [Module on Home Energy Incentives](https://www.hvactrain.com/tool/module-on-home-energy-incentives.md)
* [Quality Install Tool](https://www.hvactrain.com/tool/quality-install-tool.md)
* [Heat Pump Water Heater Installation Tool](https://www.hvactrain.com/tool/heat-pump-water-heater-installation-tool.md)
* [Cold Climate Heat Pump Decision Tool](https://www.hvactrain.com/tool/cold-climate-heat-pump-decision-tool.md)
* [HVAC Psychrometric Chart](https://www.hvactrain.com/tool/hvac-psychrometric-chart.md)

### Videos

* [Oakland Together 40 under 40 Class of 2026](https://www.hvactrain.com/video/40-under-40-class-of-2026.md)
* [EP271 Live from NHPC 2026: Where HVAC, Buildings, and People Intersect With Brynn Cooksey](https://www.hvactrain.com/video/ep271-live-from-nhpc-2026-where-hvac-buildings-and-people-intersect-with-brynn-cooksey.md)
* [Duct Diagnostics: Evaluation & Troubleshooting for Real-World Systems](https://www.hvactrain.com/video/duct-diagnostics-evaluation-troubleshooting-for-real-world-systems.md)
* [What Winning Contractors Do Differently – Stop Competing on Price and Build Real Trust](https://www.hvactrain.com/video/what-winning-contractors-do-differently-stop-competing-on-price-and-build-real-trust.md)
* [How Air Doctors Uses measureQuick Daily - Brynn Cooksy | 2026 HVACR Training Symposium - Part 2](https://www.hvactrain.com/video/how-air-doctors-uses-measurequick-daily-brynn-cooksy-2026-hvacr-training-symposium-part-2.md)
* [From Handwritten Forms to Half-Percent Callbacks - Brynn Cooksey | 2026 HVACR Training Symposium - Part 1](https://www.hvactrain.com/video/from-handwritten-forms-to-half-percent-callbacks-brynn-cooksey-2026-hvacr-training-symposium.md)
* [What is an Energy Audit? | Ask a Contractor with Air Doctors Heating and Cooling](https://www.hvactrain.com/video/what-is-an-energy-audit-ask-a-contractor-with-air-doctors-heating-and-cooling.md)
* [What Is a Heat Pump? | Preparing for a Heat Pump Retrofit | Ask a Contractor](https://www.hvactrain.com/video/what-is-a-heat-pump-preparing-for-a-heat-pump-retrofit-ask-a-contractor.md)
* [What is the Building Performance Institute (BPI) and What Are Their Most Popular Certifications?](https://www.hvactrain.com/video/what-is-the-building-performance-institute-bpi-and-what-are-their-most-popular-certifications.md)
* [Brynn Cooksey on Building Science & MeasureQuick: How Home Performance Is Changing HVAC](https://www.hvactrain.com/video/brynn-cooksey-on-building-science-measurequick-how-home-performance-is-changing-hvac.md)
* [2026 Top 25 Most Influential Instructors/Trainers](https://www.hvactrain.com/video/2026-top-25-most-influential-instructors-trainers.md)
* [Understanding a Home's Hidden Air Leaks: The Power of Blower Door Testing](https://www.hvactrain.com/video/understanding-a-homes-hidden-air-leaks-the-power-of-blower-door-testing.md)
* [What is Home Performance?](https://www.hvactrain.com/video/what-is-home-performance.md)
* [Navigating the Heat Pump Jungle Webinar](https://www.hvactrain.com/video/navigating-the-heat-pump-jungle-webinar.md)
* [IAQ for the HVAC Tech with Brynn Cooksey](https://www.hvactrain.com/video/iaq-for-the-hvac-tech-with-brynn-cooksey.md)
* [Major parts shortage hits heating and cooling industry as A/C units start kicking into high gear](https://www.hvactrain.com/video/major-parts-shortage-hits-heating-and-cooling-industry-as-a-c-units-start-kicking-into-high-gear.md)
* [Avoid the HVAC Race to the Bottom – With Building Science, Heat Pumps, and Brynn Cooksey](https://www.hvactrain.com/video/avoid-the-hvac-race-to-the-bottom-with-building-science-heat-pumps-and-brynn-cooksey.md)
* [Brynn Cooksey on Leading the Way with AirAdvice](https://www.hvactrain.com/video/brynn-cooksey-on-leading-the-way-with-airadvice.md)
* [Brynn Cooksey on The Art of Motivating Techs: Strategies for Success](https://www.hvactrain.com/video/brynn-cooksey-on-the-art-of-motivating-techs-strategies-for-success.md)
* [Brynn Cooksey on Becoming a Real-life Success Stories with AirAdvice](https://www.hvactrain.com/video/brynn-cooksey-on-becoming-a-real-life-success-stories-with-airadvice.md)
* [Brynn Cooksey on Ventilation Victories: Overcoming Sales Objections](https://www.hvactrain.com/video/brynn-cooksey-on-ventilation-victories-overcoming-sales-objections.md)
* [Brynn Cooksey on The Business of IAQ Monitoring and Reporting: Effective Tools for Management](https://www.hvactrain.com/video/brynn-cooksey-on-the-business-of-iaq-monitoring-and-reporting-effective-tools-for-management.md)
* [Brynn Cooksey on Navigating Customer Conversations in HVAC: The Scripted Approach](https://www.hvactrain.com/video/brynn-cooksey-on-navigating-customer-conversations-in-hvac-the-scripted-approach.md)
* [The Business of IAQ Monitoring and Reporting](https://www.hvactrain.com/video/the-business-of-iaq-monitoring-and-reporting.md)
* [Brynn Cooksey on Building a Strong Company Culture Through Training](https://www.hvactrain.com/video/brynn-cooksey-on-building-a-strong-company-culture-through-training.md)
* [Brynn Cooksey on Training and Trying](https://www.hvactrain.com/video/brynn-cooksey-on-training-and-trying.md)
* [Getting Electrification Right](https://www.hvactrain.com/video/getting-electrification-right.md)
* [Managing Indoor Air Quality - Don't forget the "V" in HVAC](https://www.hvactrain.com/video/managing-indoor-air-quality-dont-forget-the-v-in-hvac.md)
* [Problem Solving Design](https://www.hvactrain.com/video/problem-solving-design-2.md)
* [Pearl Edison](https://www.hvactrain.com/video/pearl-edison-2.md)
* [Air Doctors - Service Nation Alliance video testimonial](https://www.hvactrain.com/video/air-doctors-service-nation-alliance-video-testimonial-2.md)
* [Incorporating Building Science Into HVAC](https://www.hvactrain.com/video/incorporating-building-science-into-hvac.md)
* [Turning Utility Programs into Install-Ready Job](https://www.hvactrain.com/video/turning-utility-programs-into-install-ready-job.md)
* [Home Energy Audits with Electrify Now](https://www.hvactrain.com/video/home-energy-audits-with-electrify-now.md)
* [SPEER Industry + Policy Workshop 2025](https://www.hvactrain.com/video/speer-industry-policy-workshop-2025.md)
* [Real-World Financing Questions Contractors Are Asking](https://www.hvactrain.com/video/real-world-financing-questions-contractors-are-asking.md)
* [Academy helps Michigan trainees launch energy efficiency careers](https://www.hvactrain.com/video/academy-helps-michigan-trainees-launch-energy-efficiency-careers.md)
* [Master the Art of Self-Scouting](https://www.hvactrain.com/video/master-the-art-of-self-scouting-2.md)
* [What is Combustion Safety Testing in Building Performance?](https://www.hvactrain.com/video/what-is-combustion-safety-testing-in-building-performance.md)
* [The Top 25 Most Influential HVACR Educators and Trainers of 2024](https://www.hvactrain.com/video/the-top-25-most-influential-hvacr-educators-and-trainers-of-2024-2.md)
* [Blower Door Basics](https://www.hvactrain.com/video/blower-door-basics.md)
* [Duct Testing Webinar - from The Energy Conservatory (TEC)](https://www.hvactrain.com/video/duct-testing-webinar-from-the-energy-conservatory-tec.md)
* [Understanding the Stack Effect and Building Ventilation](https://www.hvactrain.com/video/understanding-the-stack-effect-and-building-ventilation.md)
* [Blower Door and DuctBlaster System Maintenance and Calibration](https://www.hvactrain.com/video/blower-door-and-ductblatser-system-maintenance-and-calibration.md)
* [Minimizing the Effect of Wind on Blower Door Tests](https://www.hvactrain.com/video/minimizing-the-effect-of-wind-on-blower-door-tests.md)
* [The Business of HVAC/R Boot Camp](https://www.hvactrain.com/video/the-business-of-hvac-r-boot-camp.md)
* [Serendipity Interview: Brynn Cooksey - Air Doctors Heating and Cooling](https://www.hvactrain.com/video/serendipity-interview-brynn-cooksey-air-doctors-heating-and-cooling.md)
* [Air Doctors - Service Nation Alliance video testimonial](https://www.hvactrain.com/video/air-doctors-service-nation-alliance-video-testimonial.md)
* [Zeolite process for water softening (Permutit process) - Water technology](https://www.hvactrain.com/video/zeolite-process-for-water-softening-permutit-process-water-technology.md)
* [Control Valve Types (Gate Valve, Globe Valve, Ball Valve etc.)!](https://www.hvactrain.com/video/control-valve-types-gate-valve-globe-valve-ball-valve-etc.md)
* [How Boiler Combustion Works - Steam Culture](https://www.hvactrain.com/video/how-boiler-combustion-works-steam-culture.md)
* [How does a Centrifugal pump work?](https://www.hvactrain.com/video/how-does-a-centrifugal-pump-work.md)
* [Annual Boiler Inspection - Steamworks](https://www.hvactrain.com/video/annual-boiler-inspection-steamworks.md)
* [Flame Scanner | Working Principle | Instrumentation Knowledge](https://www.hvactrain.com/video/flame-scanner-working-principle-instrumentation-knowledge.md)
* [What is Safety Valve law | Theory | Definition|?](https://www.hvactrain.com/video/what-is-safety-valve-law-theory-definition.md)
* [Green Training: Steam Boiler](https://www.hvactrain.com/video/green-training-steam-boiler.md)
* [What is a Boiler and How does It Work?](https://www.hvactrain.com/video/what-is-a-boiler-and-how-does-it-work.md)
* [Boiler Cutoff, Blow Downs, and Gauge Glasses](https://www.hvactrain.com/video/boiler-cutoff-blow-downs-and-gauge-glasses.md)
* [Classification of Boiler](https://www.hvactrain.com/video/classification-of-boiler.md)
* [How Watertube Boilers Work (Engineering)](https://www.hvactrain.com/video/how-watertube-boilers-work-engineering.md)
* [How Fire Tube Boilers Work (Industrial Engineering)](https://www.hvactrain.com/video/how-fire-tube-boilers-work-industrial-engineering.md)
* [The Top 25 Most Influential HVACR Educators and Trainers of 2024](https://www.hvactrain.com/video/the-top-25-most-influential-hvacr-educators-and-trainers-of-2024.md)
* [Problem Solving Design](https://www.hvactrain.com/video/problem-solving-design.md)
* [Building Science Education - 4-4 - Heat Pumps](https://www.hvactrain.com/video/building-science-education-4-4-heat-pumps.md)
* [Building Science Education - 4-5 - Sample Load Calculations](https://www.hvactrain.com/video/building-science-education-4-5-sample-load-calculations.md)
* [Heat Pump Water Heaters 2](https://www.hvactrain.com/video/heat-pump-water-heaters-2.md)
* [Heat Pump Water Heater](https://www.hvactrain.com/video/heat-pump-water-heater.md)
* [Building Science Education - 4-8 - Water Heating Technologies](https://www.hvactrain.com/video/building-science-education-4-8-water-heating-technologies.md)
* [Building Science Education - 4-7 - The Science of Water Heating](https://www.hvactrain.com/video/building-science-education-4-7-the-science-of-water-heating.md)
* [Air Advice Podcast with the Air Doctor](https://www.hvactrain.com/video/air-advice-podcast-with-the-air-doctor.md)
* [What Is BetterHVAC? w/ Bill Spohn, Kevin Hart, Ben Reed, Adam Mufich](https://www.hvactrain.com/video/what-is-betterhvac-w-bill-spohn-kevin-hart-ben-reed-adam-mufich.md)
* [Pearl Edison](https://www.hvactrain.com/video/pearl-edison.md)
* [Heat Pumps are the future - HVACU](https://www.hvactrain.com/video/heat-pumps-are-the-future-hvacu-2.md)
* [Heat Pumps - Training is Important - HVACU](https://www.hvactrain.com/video/heat-pumps-training-is-important-hvacu.md)
* [Heat Pumps - Environmental Impact - HVACU](https://www.hvactrain.com/video/heat-pumps-environmental-impact-hvacu.md)
* [Heat Pumps - Happy Customers - HVAC U](https://www.hvactrain.com/video/heat-pumps-happy-customers-hvac-u.md)
* [Heat Pumps - Cost to Operate - HVACU](https://www.hvactrain.com/video/heat-pumps-cost-to-operate-hvacu.md)
* [Heat Pumps work great in cold climates - HVACU](https://www.hvactrain.com/video/heat-pumps-work-great-in-cold-climates-hvacu.md)
* [Heat Pumps are the future - HVACU](https://www.hvactrain.com/video/heat-pumps-are-the-future-hvacu.md)
* [Building Performance Institute (BPI) Certifications Explained: Insights from CEO Amanda Hatherly](https://www.hvactrain.com/video/building-performance-institute-bpi-certifications-explained-insights-from-ceo-amanda-hatherly.md)

### Products

* [Healthy Housing Principles Reference Guide (Digital Guide)](https://www.hvactrain.com/product/healthy-housing-principles-reference-guide-digital-guide.md)
* [Healthy Housing Principles Reference Guide (Printed Version)](https://www.hvactrain.com/product/healthy-housing-principles-reference-guide.md)
* [Building Science Principles Reference Guide - Second Edition (Printed Version)](https://www.hvactrain.com/product/building-science-principles-reference-guide-second-edition-printed-version.md)
* [Building Science Principles Reference Guide - Second Edition (Digital Guide)](https://www.hvactrain.com/product/building-science-principles-reference-guide-second-edition-digital-guide.md)
* [Healthy Housing Principles - Exam Code](https://www.hvactrain.com/product/healthy-housing-principles-exam-code.md)
* [Building Science Principles Certificate - Exam Code](https://www.hvactrain.com/product/building-science-principles-certificate-exam-code.md)
* [BPI Multifamily Building Analyst (MFBA) Certification (Practical Exam)](https://www.hvactrain.com/product/bpi-multifamily-building-analyst-mfba-certification-practical-exam.md)
* [2023 NEC Code Update](https://www.hvactrain.com/product/2023-nec-code-update.md)
* [Journeyman and Masters Electrican Prep Course](https://www.hvactrain.com/product/journeyman-and-masters-electrican-prep-course.md)
* [BPI Healthy Home Evaluator (HHE) Certification Exam](https://www.hvactrain.com/product/bpi-healthy-home-evaluator-hhe-certification-exam.md)
* [Low GWP Refrigerant Safety: Flammable and Mildly Flammable (A2L) Refrigerants Exam](https://www.hvactrain.com/product/low-gwp-refrigerant-safety-flammable-and-mildly-flammable-a2l-refrigerants-exam.md)
* [EPA 608 Technician Certification Exam](https://www.hvactrain.com/product/epa-608-technician-certification.md)
* [BPI Multifamily Building Analyst (MFBA) Certification (Online/Written Exam)](https://www.hvactrain.com/product/bpi-multifamily-building-analyst-mfba-certification-online-written-exam.md)
* [BPI Infiltration and Duct Leakage (IDL) Certification Exam](https://www.hvactrain.com/product/bpi-infiltration-and-duct-leakage-idl-certification-exam.md)
* [BPI Quality Control Inspector Exam](https://www.hvactrain.com/product/bpi-quality-control-inspector-exam.md)
* [BPI Energy Auditor Online Exam](https://www.hvactrain.com/product/bpi-energy-auditor-online-exam.md)
* [BPI Energy Auditor Field Exam](https://www.hvactrain.com/product/bpi-energy-auditor-field-exam.md)
* [Healthy Housing Principles (HHP) Certificate of Knowledge Exam](https://www.hvactrain.com/product/healthy-housing-principles-hhp-certificate-of-knowledge-exam.md)
* [BPI Building Science Principles (BSP) Certificate Exam](https://www.hvactrain.com/product/bpi-building-science-principles-bsp-certificate-exam.md)
* [BPI Building Analyst Technician (BA-T) Certification Exam](https://www.hvactrain.com/product/bpi-building-analyst-technician-ba-t-certification-exam.md)
* [BPI Building Analyst Professional (BA-P) Certification Exam](https://www.hvactrain.com/product/bpi-building-analyst-professional-ba-p-certification-exam.md)

### Events

* [2026 In-Person/Virtual Training Week - December](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-december.md)
* [2026 In-Person/Virtual Training Week - November](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-november.md)
* [2026 In-Person/Virtual Training Week - October](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-october.md)
* [2026 In-Person/Virtual Training Week - September](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-september.md)
* [2026 In-Person/Virtual Training Week - August](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-august.md)
* [2026 In-Person/Virtual Training Week - July](https://www.hvactrain.com/event/2026-in-person-virtual-training-week-july.md)