I'm coming back. I finally finished the revised guide yesterday. I was really hoping to have it done before Christmas, but that didn't work out. Hopefully today, if not by the end of the weekend, I should have the guide available abd at l east a short announcement video up. I'm really hoping to put out something every week. It might nit be a video everytime, but we will see. I'm still working it out a little. But watch out for something by this weekend.
Hopefully a easy question. If you match a small house (600 sq ft, 4800 cu ft) which needs 75 CFM( at 1 ACH) with a small furnace 40,000(32,000) BTU which on low speed only goes down to approx. 750 CFM. What am I missing as the solution?
@@RichardSwayze-s4i I don't understand the question. I assume you mean the house needs 750 cfm, there's no way it only needs 75 cfm. Your furnace is going to need to have a minimum of about 750 cfm any time it's running anyway depending on what the max temp rise is. You mentioned ACH, are you talking about bringing in 75 cfm for outside air?
Do you think that using only 6 inch round duct is an acceptable practice? Or do you think it causes some rooms to have too much or too little airflow. Thanks
@@masonanderson4859 no. There may be some cases where it all just happens to work out like that, and even then you would almost certainly need a balancing damper on every or almost every outlet. And even though this is recommended by ACCA, it's impractical for most residential homes. The best way to try and balance a duct system in residential during design is to size your registers and ducts differently based on necessary cfm. But, every situation is different, and some climates may be more likely than others to have closer to equal loads. Or, if it's particularly easy to just make sure every register needs the exact same cfm it may work out. But I've never done a design that didn't have some 5", some 6", and some 7". So at least 3 different sized ducts and at least 2 different sizes of registers.
@Tmechanically Thanks. I've worked at 2 companies in MN and they only use 6 inch round for supplies. I am building my own house soon, and plan to size the individual runs properly
Come back to us!! These are some of the best vids around! I’d pay to keep them coming
I'm coming back. I finally finished the revised guide yesterday. I was really hoping to have it done before Christmas, but that didn't work out. Hopefully today, if not by the end of the weekend, I should have the guide available abd at l east a short announcement video up.
I'm really hoping to put out something every week. It might nit be a video everytime, but we will see. I'm still working it out a little.
But watch out for something by this weekend.
@@Tmechanically awesome!
I really liked that it was easy to follow easy to understand and great information. Got me thinking about the duckwork I put in, in the past.
Don't forget about the acoustic insulation, need to increase the duct to suit the insulation.
is this document still available i cant seem to find it
How about reducing trunk size from end to end. When would you reduce the size? Based on cfms needed?
Hopefully a easy question. If you match a small house (600 sq ft, 4800 cu ft) which needs 75 CFM( at 1 ACH) with a small furnace 40,000(32,000) BTU which on low speed only goes down to approx. 750 CFM. What am I missing as the solution?
@@RichardSwayze-s4i I don't understand the question. I assume you mean the house needs 750 cfm, there's no way it only needs 75 cfm. Your furnace is going to need to have a minimum of about 750 cfm any time it's running anyway depending on what the max temp rise is.
You mentioned ACH, are you talking about bringing in 75 cfm for outside air?
Do you think that using only 6 inch round duct is an acceptable practice? Or do you think it causes some rooms to have too much or too little airflow. Thanks
@@masonanderson4859 no. There may be some cases where it all just happens to work out like that, and even then you would almost certainly need a balancing damper on every or almost every outlet.
And even though this is recommended by ACCA, it's impractical for most residential homes.
The best way to try and balance a duct system in residential during design is to size your registers and ducts differently based on necessary cfm.
But, every situation is different, and some climates may be more likely than others to have closer to equal loads. Or, if it's particularly easy to just make sure every register needs the exact same cfm it may work out. But I've never done a design that didn't have some 5", some 6", and some 7". So at least 3 different sized ducts and at least 2 different sizes of registers.
@Tmechanically Thanks. I've worked at 2 companies in MN and they only use 6 inch round for supplies. I am building my own house soon, and plan to size the individual runs properly
CAN WE DOWN LOAD YOUR DOCUMENT COST???
(Suff -ICE) lol jk but other than that i love the video haha very good info bud.
🫵🏻💪