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moonlighting
I was thinking about starting to do some sidework in the HVAC consulting market. To keep from competing directly w/ the company I work for I was going to try and contact some architects in adjacent cities, about 3 hours away from where I work, but still in the same state. Does anybody think...- cubsfan
- Thread
- Replies: 2
- Forum: HVAC/R engineering
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Duct Insulation
R=5.6 or more is required by most codes. This is the minimum R value that will keep from condensation at 55F supply air. 2" batt will give you an R of about 6 or 7. Oh, yea--it doesn't matter what you have if you don't have a solid vapor barrier(standard batt comes with it, foil faced).- cubsfan
- Post #5
- Forum: HVAC/R engineering
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a/c air flow rate
400 cfm/ton is standard ASHRAE design criteria. For residential construction,depending on how much glass the house has, 400 to 500 cfm/sq. ft will do--you can extrapolate the tonage from that. I've actually designed closer to 600cfm/sq.ft. before, but there was hardly any envelope load in that...- cubsfan
- Post #5
- Forum: HVAC/R engineering
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Improper air flow, I think.
First of all its a bad idea to condition two stories with one unit. The level w/ the thermostat is always satasfied, and the other, hardly ever. Hopefully, you have adjustable registers to adjust the airflow during summer winter conditions. odviously the upper level will always remain warmer...- cubsfan
- Post #7
- Forum: HVAC/R engineering
