- Welcome to www.hvactechgroup.com - forums.
Recent posts
#1
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 06, 2026, 09:22:04 AMQuote from: Porcupinepuffer on June 06, 2026, 08:42:07 AMI would have liked to see the return air to the furnace done differently. I would have used two large radius elbows back to back between the filter rack and return air plenum. That would cut down static pressure on the return side.Thanks for your comments.
I also would have made a proper starting collar and transition from the supply plenum for the two supply trunks leaving the pair of pants. It shouldn't feed two trunks from a smaller opening if those two supply trunks were sized for what's needed. I do see the damper mostly closed for the smaller trunk, so maybe all that flow isn't needed.
I also would have liked to see some radius elbows used. Will know more once we do a heat rise and likely static pressure tests.
Yes, the damper is closed a bit to try and force a bit more to the upper floor. We are experimenting still but really need to know if the static pressures will allow us to pinch these back.
My installer is a great guy and did a really good job of helping with this rather large undertaking with minimal intrusion. It was a balancing act of getting enough heating/cooling to extreme parts of the house without ripping into walls and ceilings too much. We are hoping its going to work out.
So far it seems to work ok, in heat mode the upper bedrooms are a bit cooler than lower levels (hence damping the one trunk)and the whole system is rather loud but we aren't used to forced air so may take some getting used to yet. Cheers
#2
HVAC Help / Re: Static Pressure test
Last post by Porcupinepuffer - June 06, 2026, 08:42:07 AMI would have liked to see the return air to the furnace done differently. I would have used two large radius elbows back to back between the filter rack and return air plenum. That would cut down static pressure on the return side.
I also would have made a proper starting collar and transition from the supply plenum for the two supply trunks leaving the pair of pants. It shouldn't feed two trunks from a smaller opening if those two supply trunks were sized for what's needed. I do see the damper mostly closed for the smaller trunk, so maybe all that flow isn't needed.
I also would have made a proper starting collar and transition from the supply plenum for the two supply trunks leaving the pair of pants. It shouldn't feed two trunks from a smaller opening if those two supply trunks were sized for what's needed. I do see the damper mostly closed for the smaller trunk, so maybe all that flow isn't needed.
#3
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 05, 2026, 06:36:57 AMQuote from: Hgye on June 05, 2026, 06:19:43 AMNo red flags there as far as static pressure. It looks like you have plenty of ductwork. If you are going to use the high MERV filters, then just change them regularly. Did they record the startup numbers in your manual?Thanks Hgye,
Start up numbers? What numbers should they have recorded?? I haven't seen anything.
#4
HVAC Help / Re: Static Pressure test
Last post by Hgye - June 05, 2026, 06:19:43 AMNo red flags there as far as static pressure. It looks like you have plenty of ductwork. If you are going to use the high MERV filters, then just change them regularly. Did they record the startup numbers in your manual?
#5
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 04, 2026, 10:55:37 PMQuote from: Admin on June 03, 2026, 08:54:46 PMThis should be fixed now. You will see the ADD FILES button next to PREVIEW & POST buttons. Thanks for pointing that out!Great, no problem and thanks!
#6
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 04, 2026, 10:53:44 PMQuote from: Hgye on June 03, 2026, 06:14:07 AMQuote from: Brian270 on May 30, 2026, 10:51:12 AMQuote from: Hgye on May 30, 2026, 08:51:29 AMCan you post some pictures of the installation?Sure will shortly.
Where are the pictures?
[/quote
#7
HVAC Help / Re: Static Pressure test
Last post by Admin - June 03, 2026, 08:54:46 PMThis should be fixed now. You will see the ADD FILES button next to PREVIEW & POST buttons. Thanks for pointing that out!
#8
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 03, 2026, 01:05:58 PMQuote from: Hgye on June 03, 2026, 06:14:07 AMDoesn't look like I can. No file or image upload button. Maybe I need a certain number of posts?Quote from: Brian270 on May 30, 2026, 10:51:12 AMQuote from: Hgye on May 30, 2026, 08:51:29 AMCan you post some pictures of the installation?Sure will shortly.
Where are the pictures?
Not sure what pictures would do to help answer my question. What pics would help? Furnace? Whatever exposed ducts we still have? Just asking if it would be a good test after a reno install to ensure system is within Trane specs so we dont fry the blower motor.
Cheers
#9
HVAC Help / Re: Static Pressure test
Last post by Brian270 - June 03, 2026, 12:46:50 PMQuote from: Admin on June 03, 2026, 04:51:58 AMI verify the temperature rise, and only if it's out of range will I start checking ductwork and fan speeds.Thats an easy check to start off. Thanks for bumping me in that direction. I'll start there.
Cheers
#10
HVAC Help / Re: Static Pressure test
Last post by Hgye - June 03, 2026, 06:14:07 AMQuote from: Brian270 on May 30, 2026, 10:51:12 AMQuote from: Hgye on May 30, 2026, 08:51:29 AMCan you post some pictures of the installation?Sure will shortly.
Where are the pictures?