Category 02
HVAC, plumbing, electrical, drainage, and other house systems in plain English.
Starter library
Every guide is source-controlled, reviewed against the Casaology safety standard, and linked to its supporting references.
Understand your electrical panel, breakers, main disconnect, circuit labels, GFCI/AFCI protection, tripped breakers, and the warning signs that require an electrician.
Read guideLearn what a GFCI outlet does, how TEST and RESET work, why one may trip or refuse to reset, where GFCI protection is commonly found, and when to call an electrician.
Read guideFind your home's main water shutoff, identify common valve types, learn how to verify it safely, and know what to do if a leak occurs or the valve will not close.
Read guideUnderstand what HVAC means, how furnaces, heat pumps, air conditioners, boilers, ducts, filters, thermostats, and ventilation fit together, and how to identify the system in your home.
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