TWEAKING the air balance requires a HANDS-ON approach with small, iterative changes by an experienced tech...
Originally posted by tmoss
I'm soliciting PROFESSIONAL opinions and possible solutions.
Last year this same guy ran a Manual J and determined I needed between 3.5 and 4 tons.
My electric usage is down 25-30% and I'm keeping my upstairs 3 degrees cooler AND keeping my foyer area cooler as well compared to the old inadequate unit.
16" return he added has a 12X30 inlet grill to a closet. )
Ceiling has a 12X14 return because an existing light fixture prevented the proper size from being installed. He pointed out that the light needs to be removed for him to make it right. He also commented that another 8" return would help the unit when running on high speed. BUT, unless I keep the T-stat on 70 it seldom runs on high.
In fact, it's usually set on 76.
73 get me 50-53% RH but that's too cold for my babies.
Did he run a Manual D? I doubt it.
His service and advise to me has been just fine.
Well, he's pragmatic.
I titled this post air balance because I wanted to know how much ducting this unit needs to run the way it is designed to run.
If I want to add or modify my ducting differently than what he suggests I need to have some intelligent and valid data to support it.