Static pressure on infinity control

[wormie1205]

What is a good pressure on the control? I have a 4 ton unit. It is a carrier split system with a 96 gas furnace o infinity control.

[Cold Feet]

What is a good pressure on the control? I have a 4 ton unit. It is a carrier split system with a 96 gas furnace o infinity control.

Below 0.7 even with a dirty filter.

[wormie1205]

My static pressure in high is around 0.66. Guess I'm OK

[wormie1205]

what should I do to improve the pressure?

[dan sw fl]

what should I do to improve the pressure?

Smooth duct transitions are nice to the air.
Kinks can sometimes be easily eliminated.

Use manufacturers WYE's instead of on-site fabricated junctions made from insulating board (a.k.a. duct board).

Record overall static pressure with a NEW filter (hopefully about 0.5") and when the pressure is increased by about 0.2" (0.7" total), it is time to replace the filter.

Do not use higher than a MERV 8 1" pleated filter. MERV 6 is sufficient.

Or use a 5" filter so that filter replacement is less frequent ( perhaps annually with 5") and initial resistance is minimal.

[wormie1205]

This system had a temp of 68 in one room, and 71 in all the rest. That one room is the biggest in the house with 3 vents and around 670 sq ft. Strange system.

[Daltex]

Strange but good. Have a tech come out and measure the static supply side vs. return. It the return is restrictive, add more filtration or ducting according to need. If high on supply side then add ducting refinements to lower it a bit.

Once you have it perfected or even if you leave it as is, you still have room to adjust dampers to balance the airflow. Airflow adjustment will increase the static and could create noise issues if the static is to high.

You may have enough room to balance the airflow without changes so you will need a good tech that has experience with this. I assume you have a 4" filter but if not I'd add it regardless.

[dan sw fl]

This system had a temp of 68 in one room, and 71 in all the rest. That one room is the biggest in the house with 3 vents and around 670 sq ft. Strange system.

If you want 1'F variance throughout the house, call and pay $,$$$. to an air balan$er.

[dash]

This system had a temp of 68 in one room, and 71 in all the rest. That one room is the biggest in the house with 3 vents and around 670 sq ft. Strange system.

That's the orignal duct system ,not the equipment!


It can be corrected.

[Cold Feet]

what should I do to improve the pressure?

There's no need to reduce static unless it's over limits or you're planning to rework your ducting for some reason.

Just remember to replace your filter when it's dirty.

[wormie1205]

The 3 vents to the large room are 8 inch and the rest of the house are 6 except for the large great room upstairs. it has 10 inch split into 3 upstairs.

[wormie1205]

Does anyone have any idea what operating system thie unit uses to control itself? windows, linux, etc?

[Daltex]

Most things like this use a version of linux. Not sure though but not MS for sure. You planning on hacking into it?