Timeline for Optimizing HVAC airflow for cooling
Current License: CC BY-SA 4.0
6 events
| when toggle format | what | by | license | comment | |
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| May 9, 2023 at 12:34 | comment | added | JACK | You could also experiment with closing some of the downstairs registers to alow more air to get upstairs. I think this is a common problem with many two story homes. Many new homes in Florida have two AC units installed, one for each floor. | |
| May 9, 2023 at 4:21 | comment | added | Jamesfo | I'm no expert, that's why I'm here ;) One possibility is that it goes...up. Outside air coming in resulting from negative pressure is only noticeable in the basement, where the air is colder and denser, so as natural convection happens, the AC treated air entering the upstairs sinks down and the (hot) outdoor air pulled from the basement rises up. Due to the vaulted ceilings, this hot air has plenty of space to collect, where it maintains lower pressure. Due to the HVAC's location in the basement it is "easier" to pull air from outside then recirculate hot air from the lofted ceilings upstairs | |
| May 9, 2023 at 3:29 | comment | added | Jasen | if it's outside air coming in, where it is going out? | |
| May 9, 2023 at 2:41 | comment | added | jay613 | There may be clever ways to add upstairs registers. Ask an expert or maybe an architect. It may be possible to reduce the blower speed or to automate doing that. That won't solve all the problems but might help a bit. | |
| May 9, 2023 at 2:39 | comment | added | Jamesfo | This is something I was wondering about. It's not specifically cold air being sucked in, it's outdoor air. So yes, some kind of negative pressure. But if the upstairs is an open floorplan and no registers or returns are obstructed and the basement door is open, it seems nothing can be done about it without re-engineering the ducting. Is there a rule for which returns/registers to remove to get negative pressure to balance? Will this also fix the upstairs/downstairs disparity problem? | |
| May 9, 2023 at 2:07 | history | answered | jay613 | CC BY-SA 4.0 |