3 ms·
The problem is when humidity rises it makes it harder forbthe body to expel hear via evaporation. This is what is happening in places like UK this time around.
by rdedev 1mo ago
The problem is when humidity rises it makes it harder forbthe body to expel hear via evaporation. This is what is happening in places like UK this time around. An AC helps get rid of the humidity as it cools the air. I don't know about necessity now but 20 years down the line, who knows
- piskov 1mo agoCooling the air by definition raises the humidity :-) Dehumidifier mode in AC works by cooling the air below the dew point, removing the condensation, then warming the air up (either by itself or literally heating it up)
- t_mahmood 1mo agoBut for dehumidifier in AC, the heat is dispensed through the outdoor unit, so end result actually cools the house. I use our AC in dehumidifier mode, also, as I understand it has less power consumption (please correct me if I am wrong). In my experience, it cools down the room pretty well
- rdtsc 1mo agoIt really depends on the type of ac unit and conditions. If for example it has to cool it first to condense the moisture out and then also reheat it back to avoid blowing back air that’s too cold, it may consume more power even.
- raincom 1mo agoI won't say "less power consumption". Definitely, not more consumption if efficient controls and motors are used (ECM motors for air handlers, VFD compressors). The real problem is the repair costs of these advanced units in the developed countries. Carrier wanted $8k for a new control board for a residential unit in the US. Same thing for ECM/VFD.
- piskov 1mo agoThere is nothing “advanced” about this. It is just cooling the air below the dew point. Same water tray and a hose for water condensate.
- raincom 1mo ago"advanced" is about motors (blower motor and compressor) and their controls. The context is repairs: https://www.youtube.com/watch?v=iqzEIPEky1s https://www.youtube.com/watch?v=iqzEIPEky1s
- piskov 1mo agoSuppose you have 27C with with 65% humidity. Due point for that air is 19.8C. Meaning it reaches 100% relative humidity at this point. If cooled even more, water condensates from air into droplets. — What this means: if you cool that air to 22 degrees (instead of 19.8) it will reach 87% humidity without loosing any water to the outside. — That’s why we need humidifiers in winter as the opposite thing happens: if we heat cold air that has 80% relative humidity to room temperature it will drop its humidity to 20%
- rdtsc 1mo ago> Cooling the air by definition raises the humidity :-) That’s a bit too nitpick-y. It raises the relative humidity by the condenser coil unit so it condenses and drips out, but air flowing back into the rooms will have less humidity.
- ozim 1mo agoNow my room is 26.5C and 40% relative humidity, it is really pleasant. There are days where it is 24C and relative humidity is showing 55%, that's when I turn on AC.
- ShinyLeftPad 16d agoI know people who can't bear 40% and prefer 70%. Better for the skin.