All guides
Air conditioners: the Saudi energy label, EER and SEER, refrigerants, and maintenance that saves electricity
The AC is the biggest electricity consumer in our homes. The Saudi standard SASO 2663 and its move from EER to SEER, test conditions for extreme heat, the refrigerant transition, and what the US Department of Energy says about the effect of filter cleaning.
Common AC faults: not cooling, dripping water, tripping, or noisy — causes and what you can do
Before calling a technician: many AC problems come from a clogged filter, a blocked condensate drain, or an outdoor unit choked with dust. What the US Department of Energy recommends for maintenance, and what a professional technician should check.
Split, central or ducted? Choosing an AC type for your home: distribution, ducts, humidity, filtration and maintenance
A practical comparison of ductless split units (single or multi-zone), central and ducted systems, and short-run ducted units: where each loses energy, why sizing matters, the filtration and humidity limits of splits, and maintenance. From the PNNL guide, with reference to the Saudi efficiency label.
Indoor air and dust at home: where dust gets in, humidity and odours, and MERV filters
Dust, odours and humidity indoors have three known remedies: source control, ventilation and filtration. From U.S. EPA guidance: MERV filter ratings, target humidity, the 24–48 hour rule against mold, and when to call a professional.
Evaporative (desert) coolers: how they work, when they help and when they don't, water and maintenance, and how they compare with AC
An evaporative cooler cools air by evaporating water, so it works in dry air and weakens in humid air. The principle, direct and indirect types, water and power use, the need for relief openings, and pad and sump maintenance, from the PNNL guide.