Is this bad? We have all our offshoot vent pipes coming straight off the furnace instead of trunk lines. I've tried to attach a photo, but had trouble until I zipped it up and then attached it.
Our house doesn't get much heat (or cool air in summer), except for the basement. I've confirmed there are not blockages in the vents, but there are numerous leaks. Will fix those first. We also have return vents that seem to be clean and in good condition. The furnace was replace 2 years ago, but the problem of low air flow has been there for nearly 20 years.
But I'm curious to hear if this 'design' is bad. I wonder if the air would flow more freely if offshoot pipes ran of a trunk instead of the furnace itself.