I also believe in the testo 550 i am curious you said the the clamps have thermistors that the accurcy of the pipe clamps were capable of picking up the temp difference of the dryer. My question is will suction clamp on one side and the discharge side give give the temp difference.
How do you guys feel about aprilaire filters they advertise low pressure drop on their filters yet they have a merv16 filter with a huge pressure drop.
So I'm a homeowner with a 2stage condenser and VS furnace with ECM.Electric bills are high and doesn't bring humidity levels below 60 during day and maybe 57 at night and returns don't seem to suck very hard.Can somebody help me.I changed dipswitches and I also jumped y1 and y2 which helped a little but now ecm motor has blower limit code but still only like 1700cfms for a 5ton.
Ha..old 1950's duct system with gravity heating that is way over size for that type of movement. I see disregard for this type update all day long. For the customer to save cash, the salesman proposes to attach the new equipment to old existing pipes and ducts, baseboard and wall grates with promises that it will be okay. Then the tech gets called in to find out why the heat only flows when doors are open and the ac ices up after a short time period. "Just make it work" we get told from upstream..and don't take long.
No one provides Techs with the formulas for sizing filter rack areas; I will: HVAC Airflow- Duct, filter’s Ak and other Component Sizing Formulas: Required Ak area of the filter= CFM / required/desired fpm velocity Heating only 858-CFM / 220-fpm = 3.9 (Ak) SF (my filter numbers) 3.9 X 220 = 858-CFM 3.9 X 144 is 561.6 squared which requires a 24 X 24 filter is 600-sq.ins.; not a 16X25 filter that is 400-sq.ins. 600 Ak - open area. Ak = CFM / fpm velocity FPM= CFM / SF Ak AREA of filter CFM = fpm X SF (Ak) AREA of the filter Required Ak % of the filter AREA= filters SF area / by actual Ak area Save these Formulas & USE them to properly size filter rack areas...! Duct's dia 6" x* 6” = 36 *x .7854 = sq.ins" / 144 = 0.19635-sq.ft area I like the Purolator P-312 white Industrial Strength Disposable Synthetic Panel MERV 4 filters - low pressure drop with decent filtering - you have to order them on the Internet. A .16" PD @300-fpm; .10" PD @200-fpm velocity I like the Purolator P-312 white Industrial Strength Disposable Synthetic Panel MERV 4 filters - decent pressure drop with decent filtering - you have to order them on the Internet. A .16" PD @300-fpm; .10" PD @200-fpm velocity.
This has been the best lesson ever on airflow. Shows me what I don't know and that is so valuable. Keep it up.
Jim Bergman is a genius, thank the hvac gods for big Jim!
Great job, keep up the good work
Why dont manufacturers put measurement holes in the units
Seems it would be cheap and easy
T&B finds the eye of the fan measurement to me critical
Great class. Keep up the great work.
I also believe in the testo 550 i am curious you said the the clamps have thermistors that the accurcy of the pipe clamps were capable of picking up the temp difference of the dryer. My question is will suction clamp on one side and the discharge side give give the temp difference.
This is where adjustable playback speed is an asset.
Thank you so much lol
How do you guys feel about aprilaire filters they advertise low pressure drop on their filters yet they have a merv16 filter with a huge pressure drop.
very informative
I don't think strip heat is ever worth worrying about in any practical sense. They don't impede flow enough.
So I'm a homeowner with a 2stage condenser and VS furnace with ECM.Electric bills are high and doesn't bring humidity levels below 60 during day and maybe 57 at night and returns don't seem to suck very hard.Can somebody help me.I changed dipswitches and I also jumped y1 and y2 which helped a little but now ecm motor has blower limit code but still only like 1700cfms for a 5ton.
What area of the country? Is this Gulf Coast climate?
Ha..old 1950's duct system with gravity heating that is way over size for that type of movement. I see disregard for this type update all day long. For the customer to save cash, the salesman proposes to attach the new equipment to old existing pipes and ducts, baseboard and wall grates with promises that it will be okay.
Then the tech gets called in to find out why the heat only flows when doors are open and the ac ices up after a short time period. "Just make it work" we get told from upstream..and don't take long.
FYI. Pikes pike is over 14,000 feet above sea level. Not 7,000.
No one provides Techs with the formulas for sizing filter rack areas; I will:
HVAC Airflow- Duct, filter’s Ak and other Component Sizing Formulas:
Required Ak area of the filter= CFM / required/desired fpm velocity
Heating only 858-CFM / 220-fpm = 3.9 (Ak) SF (my filter numbers)
3.9 X 220 = 858-CFM
3.9 X 144 is 561.6 squared which requires a 24 X 24 filter is 600-sq.ins.; not a 16X25 filter that is 400-sq.ins. 600 Ak - open area.
Ak = CFM / fpm velocity
FPM= CFM / SF Ak AREA of filter
CFM = fpm X SF (Ak) AREA of the filter
Required Ak % of the filter AREA= filters SF area / by actual Ak area
Save these Formulas & USE them to properly size filter rack areas...!
Duct's dia 6" x* 6” = 36 *x .7854 = sq.ins" / 144 = 0.19635-sq.ft area
I like the Purolator P-312 white Industrial Strength Disposable Synthetic Panel MERV 4 filters - low pressure drop with decent filtering - you have to order them on the Internet. A .16" PD @300-fpm; .10" PD @200-fpm velocity
I like the Purolator P-312 white Industrial Strength Disposable Synthetic Panel MERV 4 filters - decent pressure drop with decent filtering - you have to order them on the Internet. A .16" PD @300-fpm; .10" PD @200-fpm velocity.
where is the video
The chicken.. lol..
Cherry bomb ! 😄
Heeeeeey. Pikes peak it is not at 7000 feet above sea level it is at 14,000 feet. Hahahaha
this would have been better if this was a video done on an actual unit.
It’s very hard to listen to your podcast with all of these annoying adds😜