Evaporative cooling costs 75–90% less to run than refrigerant-based air conditioning, but it works well only in dry climates, and the line between “works great” and “makes your house worse” comes down to one number: your local dew point. If…
There are three types of air conditioners that cover most homes: central air, ductless mini-splits, and window or portable units, plus a handful of niche categories like PTACs and evaporative coolers that solve for specific buildings or climates. The type…
A homemade indoor AC coil cleaner works safely only when it accounts for one detail most recipes skip: the indoor evaporator coil can’t be rinsed with a hose the way an outdoor condenser coil can. That single difference changes which…
If your AC blows warm on a hot drive, low refrigerant is the most likely cause, and you can check and refill it yourself with the right gauge and a can of the correct refrigerant. The catch is that “gauge”…
The right air conditioner size comes down to one number: BTU per hour, adjusted for your room’s specific conditions. Get that number wrong, and you either pay for cooling power you don’t use, or you buy a unit that runs…
Most air conditioner power consumption calculators give you a number that never matches your actual bill, because they multiply nameplate wattage by hours and stop there. The calculator below does the same base math, but it also accounts for how…
An air conditioner’s power requirements come down to four numbers: the amps it draws while running, the voltage it needs, the breaker or switch that protects its circuit, and, if you’re planning for an outage, the much higher surge watts…
A central AC tune-up covers about a dozen tasks, and you can legally do most of them yourself: swapping the filter, rinsing the condenser coil, straightening bent fins, clearing the condensate drain, and checking the thermostat. What you can’t do,…