Cooling Delta T - HVAC - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 04-26-2009, 03:33 PM   #1
Member
 
Join Date: Jan 2009
Location: NC
Posts: 146
Rewards Points: 75
Default

Cooling Delta T


Outdoor Temp 91
Return Temp 70
Supply Temp 50
Delta T 20

Is a 20 difference between the return plenum and supply plenum acceptable with a 91 outdoor temperature?

Advertisement

mjbxx is offline   Reply With Quote
Old 04-26-2009, 05:55 PM   #2
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 10,084
Rewards Points: 806
Default

Cooling Delta T


That is very good! 16-18 is acceptable.

Advertisement

yuri is offline   Reply With Quote
Old 04-26-2009, 06:52 PM   #3
Member
 
Join Date: Mar 2009
Location: Pennsylvania
Posts: 719
Rewards Points: 500
Default

Cooling Delta T


Yea man looking good, nice spread. almost said something dirty there regarding spread.
I'll take 20 all day long.
SULTINI is offline   Reply With Quote
Old 04-26-2009, 07:23 PM   #4
Member
 
Join Date: Dec 2008
Posts: 80
Rewards Points: 91
Default

Cooling Delta T


Funny, I was going to post a similar question. On my HP, the numbers show: Return 79, supply 62, but the od was only 80. Doesn't seem to me that the numbers are all that great. What do you think?
jeepgrady is online now   Reply With Quote
Old 04-26-2009, 07:39 PM   #5
Hvac Pro
 
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 10,084
Rewards Points: 806
Default

Cooling Delta T


16-18 degF is acceptable. You got 17. The numbers are NOT all of the equation and can be misleading. A dirty evap coil can cause low Delta T etc etc. You still need to get the freon level checked annually, plus amperage draw etc etc to know for sure.
yuri is offline   Reply With Quote
Old 04-26-2009, 08:34 PM   #6
Member
 
Join Date: Nov 2008
Posts: 279
Rewards Points: 252
Default

Cooling Delta T


Turned the a/c on for the first time this season. Was 93 in Philly area (design 90).

Checked the delta; it was 23.5. Unit is set up at 360 CFM/Ton.

V
veesubotee is offline   Reply With Quote
Old 04-27-2009, 08:00 AM   #7
Member
 
Join Date: Mar 2009
Location: Pennsylvania
Posts: 719
Rewards Points: 500
Default

Cooling Delta T


Quote:
Originally Posted by veesubotee View Post
Turned the a/c on for the first time this season. Was 93 in Philly area (design 90).

Checked the delta; it was 23.5. Unit is set up at 360 CFM/Ton.

V
I am a hoagie and cheese steak eater to and my system is running similar to yours. I'm running 400 a ton.
SULTINI is offline   Reply With Quote
Old 04-27-2009, 10:03 AM   #8
Member
 
Join Date: Nov 2008
Posts: 279
Rewards Points: 252
Default

Cooling Delta T


Quote:
Originally Posted by SULTINI View Post
I am a hoagie and cheese steak eater to and my system is running similar to yours. I'm running 400 a ton.
Who do you prefer, Pat's or Geno's? Jim's, maybe?

BTW, do you know the origin of 'hoagie'?

V
veesubotee is offline   Reply With Quote
Old 04-27-2009, 01:15 PM   #9
Member
 
Join Date: Mar 2009
Location: Pennsylvania
Posts: 719
Rewards Points: 500
Default

Cooling Delta T


Quote:
Originally Posted by veesubotee View Post
Who do you prefer, Pat's or Geno's? Jim's, maybe?

BTW, do you know the origin of 'hoagie'?

V
I am not from the city I live outside just Northeast a couple miles.

Yes in regards to the HOAGIE it started at hog island, ship builders would take sandwiches to work and it started from Hog island ship builders who named it a hoagie.

No Pats, Geno's or Jim's but I would like to try one. I know where they are.
SULTINI is offline   Reply With Quote
Old 04-27-2009, 02:00 PM   #10
Member
 
Join Date: Nov 2008
Posts: 279
Rewards Points: 252
Default

Cooling Delta T


Quote:
Originally Posted by SULTINI View Post
I am not from the city I live outside just Northeast a couple miles.
I was born and raised in Philly, now live across the big river a few miles

Quote:
Yes in regards to the HOAGIE it started at hog island, ship builders would take sandwiches to work and it started from Hog island ship builders who named it a hoagie.
A little history: In the 'olden' days, they were originally called 'hoggies' for hog island, but it evolved to 'hoagies'. Also, back in the late '40s, the family would take a ride to Pat's for a steak sandwich. There wasn't a piece of cheese to be found anywhere. It was added much later (mid-'50s).

Quote:
No Pats, Geno's or Jim's but I would like to try one. I know where they are.
Try Geno's.

V

Advertisement

veesubotee is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help! Just changed my Fan Controler (ICM 275) now system "false starts" when cooling redmachodevil HVAC 4 01-26-2011 04:21 AM
Glacier Bay, Peerless, Delta Yoyizit Plumbing 2 03-11-2009 12:20 PM
concrete basement - installing laminate on delta SDG Flooring 1 12-29-2008 09:10 PM
wiring a 220 volt delta unisaw and delta x5 planer naveall Electrical 13 10-30-2008 02:30 PM
Delta table saw blade guard problem RDS Tools 7 03-07-2008 04:29 PM




Top of Page | View New Posts