Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations JAE on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!
-
HVAC building pressure differential
I don't think it is allowed under legislation any more. The plant is just 60+ years old and those boilers were installed in the 50's/60's when this design was allowed. The new boiler we are installing will have a direct combustion path from outside. However, the legislation considers these old...- Bran8
- Post #3
- Forum: HVAC/R engineering
-
HVAC building pressure differential
Question: Is there a limit to how much negative pressure can be in a building? Is there an Ashrae standard for this? I can't seem to find anything on this. Background: This is boiler plant that is for district heating of a few building around the plant. The combustion air for the boilers is...- Bran8
- Thread
- Replies: 7
- Forum: HVAC/R engineering
-
Steam Conditioning Valve
Background: We designed a steam letdown station, which has since been installed and in operation. The system consists of a pressure reducing valve and a de-superheater right after the valve (all in one unit). Inlet conditions are 450 psig, 750 F steam in an 8" pipe to the conditioning valve and...- Bran8
- Thread
- Replies: 5
- Forum: Heat Transfer & Thermodynamics engineering
