Since heating season is fast approaching, i checked the heat on the GE and it is TWICE as good as the Haier
GE has a 14 degree rise vs. only 5-7 for both Haiers.. So my main focus for now, will be installing the GE as a heater, since the Goodman 3 ton really struggles when it drops below 45F and the big duct system has to heat up. Let's see if the GE can do better.it's an unfair test: 36k vs 8k btu, but the GE won't have to heat more than half the house. 2600w vs 715w, so whatever heat it puts out, sure won't cost much. (7 cents per hour)
Added a switch Heat/AC so this ac can be used as a heater. They don't give this option because the coil can ice up. I can get around this by using the attic warmer air. It works like this:
Early AM i turn on heat for up to an hour, then shut it off as the coil may get some ice. The sun comes up and starts to warm the attic. Around 10-11 AM the ice has melted and i get full heat without any more icing, as long as the attic is 52F or higher. Attic gets 10-30 degrees warmer than outside.
so here is what i learned from ac experts on how to keep the noise out of the room:
1. must have at least 3 feet between any noise and the register.
2. use a flex duct and make a 90 degree turn. Sound travels in a straight line and gets lost as it can't go around a corner.
3. if the 90 doesn't do it, put the duct in a zig zag box to further dissipate the noise. add sound absorption material as needed.
4. bigger ducts are quieter. sheet metal ducts are noisy. Duct board is better.
5. louvers with wider spacing flow more air and are quieter.
6. Put the ac in a heavy box to block sound. Cover the box with SafeNSound rock wool sound deadener, if necessary. Can put on loft walls too. or any walls that transmit sound. But not in the ac box, as rock wool or fglass fibers can get in your lungs.
7. Any hole in wall transmits sound. Electrical outlets need to be modified to block sound.
8. QuietRock is a special sheetrock that blocks sound 6X better.
so you can see, whatever you do, do NOT put a window ac in a wall or a window!
today's tests: took the case off. no sound padding! haier has padding. sounded much better no case, an annoying buzz disappeared, but the db was only down a little 65-68, was 68. the sound was much more tolerable without that buzz.
one expert said that even a card board box could do a lot, so i put the box it came in, on it with the top open. WOW db down to 59-60
with all the tricks to make it quiet, i may try the box for a test in the loft, and see how it does. maybe i can squeeze in an ac test before winter.