Hi Taddy! Thanks for these videos. They’re very useful. We are building a 4000 sq ft home, single story, in the Texas Hill Country near San Antonio. Open cell spray foam, which is OK for our hot and relatively dry climate. Two gas furnaces and variable speed AC on each. Just like your video, we have ducts going into the return air plenum on each HVAC and a damper flapper for each. Here’s the question: Our 3rd party inspector said that we needed a duct for combustion air for the furnaces since we have an unventilated tight attic. I had visualized a duct similar to that for the fresh air into the return plenum, except going into the combustion chamber. However, he said all that’s needed is a dryer style vent whose opening is just outside the furnace. So we have 2 vents like dryer vents hanging down from openings in the roof ending just outside each furnace. Since in a normal vented attic, gas furnaces don’t need any special combustion air ducts plumbed right into the furnace box, I guess what they’re doing for my house makes sense. Does that make sense to you? Thanks!
Will you do a video prepping techs and installers for the winter heating systems what to watch for puttings hoses on the right port pressures ect just getting ready for winter if you do ill use it to brush up my crew thanks tad
We have these small filter boxes made up for the 6” duct with a 12x12 filter in it. That way we can install it anywhere on the return. Before or after the filter.
Hey Taddy can make a video on the best way to add a Fresh Air system to a manufactured home like a double wide? The systems are and outside condenser with and inside A Frame, Furnace, and blower. I t st not think there are any fresh air intakes on the system.
Great video. Currently building, my HVAC guy will be doing a 6" fresh air intake. Question what about bathroom & stove vents? Are they able to pull in fresh air via the intake in the furnace to be effective enough?
House is pulling air back through the bath fans and causing mold around the bath fans on ceiling when the hot air from outside hits the cool air from inside it is condensating and causing mold. I have replaced the outside bath fan vent with flaps that stops the outside air from coming in. House is really tight. If I add outside air vent to the return like in you video with that stop the outside air from trying to pull through cracks in doors and other weak places?
Hi Taddy! Thanks for these videos. They’re very useful. We are building a 4000 sq ft home, single story, in the Texas Hill Country near San Antonio. Open cell spray foam, which is OK for our hot and relatively dry climate. Two gas furnaces and variable speed AC on each.
Just like your video, we have ducts going into the return air plenum on each HVAC and a damper flapper for each.
Here’s the question: Our 3rd party inspector said that we needed a duct for combustion air for the furnaces since we have an unventilated tight attic. I had visualized a duct similar to that for the fresh air into the return plenum, except going into the combustion chamber. However, he said all that’s needed is a dryer style vent whose opening is just outside the furnace. So we have 2 vents like dryer vents hanging down from openings in the roof ending just outside each furnace. Since in a normal vented attic, gas furnaces don’t need any special combustion air ducts plumbed right into the furnace box, I guess what they’re doing for my house makes sense. Does that make sense to you?
Thanks!
This is a project I have wanted to do, thank you for posting. Something I plan on doing rather soon since I just upgraded my in-house air filter
Glad I could help
Will you do a video prepping techs and installers for the winter heating systems what to watch for puttings hoses on the right port pressures ect just getting ready for winter if you do ill use it to brush up my crew thanks tad
deal
We have these small filter boxes made up for the 6” duct with a 12x12 filter in it. That way we can install it anywhere on the return. Before or after the filter.
link? thanks
Hey Taddy can make a video on the best way to add a Fresh Air system to a manufactured home like a double wide? The systems are and outside condenser with and inside A Frame, Furnace, and blower. I t st not think there are any fresh air intakes on the system.
yes I can do that for you
Great video. Currently building, my HVAC guy will be doing a 6" fresh air intake. Question what about bathroom & stove vents? Are they able to pull in fresh air via the intake in the furnace to be effective enough?
I wouldn't use the furnace to pull in fresh air for those appliances
Thanks Taddy!
You're welcome my brother
2:13 I’m still waiting for you to show me the ducks in the ceiling
House is pulling air back through the bath fans and causing mold around the bath fans on ceiling when the hot air from outside hits the cool air from inside it is condensating and causing mold. I have replaced the outside bath fan vent with flaps that stops the outside air from coming in. House is really tight. If I add outside air vent to the return like in you video with that stop the outside air from trying to pull through cracks in doors and other weak places?
Yes that may work
But a back draft damper in each bathroom vent fan would be best
I would prob put some chicken wire on the grill outside to prevent larger insects from getting inside
great idea
Why the insulation on the floor with foam under roof decking?
not sure
So you have to crawl into your attic every time you need to change the air filter?
no, there are stairs, and you can stand up
If there are Formosa termites in your area Do not build with spray foam, you have been warned
Please fill me in
Get that trash filter out of there lol