THE K&A LEARNING CENTER
Know a little more.
Feel a lot better.
Practical home comfort guides, Daikin information, and HVAC updates—with sources you can check.
13 articles
Homeowner guidesManual J, S & D: how your HVAC system gets sized
A home’s heating and cooling needs, the equipment selected, and the duct system should be designed together. Kirby walks you through the three steps.
Reviewed Oct 2, 2026Read the guideHomeowner guidesCarbon monoxide & home safety
Understand the sources, recognize the limits of symptoms and alarms, and know when to leave immediately.
Reviewed Oct 2, 2026Read the guideHomeowner guidesLow-level carbon monoxide: what your alarm may not tell you
A silent alarm does not establish zero CO. Understand alarms, supplemental monitors, and model-specific alerts.
Reviewed Oct 2, 2026Read the guideHomeowner guidesWhat happens during a combustion safety evaluation?
Understand the questions, equipment checks and documentation to discuss before a non-emergency visit.
Reviewed Oct 2, 2026Read the guideHomeowner guidesTold you have a cracked heat exchanger?
A serious finding deserves clear evidence, an explanation, and appropriate action.
Reviewed Oct 2, 2026Read the guideHomeowner guidesWhat your HVAC maintenance report means
Equipment details, measurements and findings should help you understand the work and the next steps.
Reviewed Oct 2, 2026Read the guideHomeowner guidesStatic pressure and indoor air quality: fix the cause, not the symptom
Comfort and clean air start with airflow. Why we measure static pressure, size ductwork properly, prefer media filters, and solve mold at its source — instead of selling gadgets.
Reviewed Oct 2, 2026Read the guideDaikinDaikin FIT: what to know before choosing a system
A compact outdoor design and inverter operation are part of the story. The right match for your home matters, too.
Reviewed Oct 1, 2026Read the guideHVAC updatesR-32 refrigerant: understanding the next generation
Why refrigerants are changing and what to ask when comparing new equipment.
Reviewed Oct 1, 2026Read the guideHomeowner guidesA simple plan for fall heating maintenance
A few practical steps to prepare for heating season, with guidance from the U.S. Department of Energy.
Reviewed Oct 1, 2026Read the guideHomeowner guidesSpiral duct vs. flex vs. rigid metal: an honest guide to your ductwork options
Three ways to move air through your home — spiral metal, flexible duct, and rectangular rigid metal. What each one does well, where each fits, and why installation quality matters more than the material.
Reviewed Sep 24, 2026Read the guideHomeowner guidesWhy we recommend media filters (and what they do for your system)
A deeper filter cabinet gives your system real filtration surface area — cleaner air, lower pressure drop, longer filter life, and less strain on the blower.
Reviewed Sep 23, 2026Read the guideHomeowner guidesUV lights and air cleaners: what EPA testing found in the air afterward
EPA research shows ozone-producing air-cleaning devices can leave the air worse, not better — reacting with household chemicals to form formaldehyde, other aldehydes, and ultrafine particles.
Reviewed Sep 22, 2026Read the guideFOR TECHSFIELD NOTES
For the trade.
Code updates, field education, and Hampton Roads shop talk — written for HVAC technicians. Homeowners, the guides above are the ones for you.