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From Ashrae handbook chapter8, I can find angle factor from the figure, then I can use F1*T1+F2*T2+... to get the mean radiant temperature. How can I get the angle factor/view factor from Equations(not from a chart)? I need the equation to get angle factor and write a code.

Where can I find the total annual value of construction industry of Canada?

Where can I get the study materials

How to draw shear force envelope(beam) from 3 or more cases . When i draw them in one diagram, i don;t know how to link points to make the envelope. I need your help.Thanks!

1. Jump formwork can be used for highway? 2. Concrete pump is suitable for pouring a concrete column? Anyone knows? Please give me the reason. Thanks!

Will snowfall on freshly poured concrete pose a problem? I need help and reason. Thanks!

Could air entraining agents be used when making heavyweight concrete? Anyone knows?

Who can tell me who sell these HVAC equipment.? I need the catalogue/specification of them.I'm in Canada. how to do pipe design for the garage heating when using unit heater? Assume using glycol and hot water. Complicated? Thanks!I need your help.

How to define hot water and heat pump in HAP? In the program, when i simulate HEAT PUMP energy, it gave me 0 BTU in winter time. And it reminds me i have no hot water source. Who can tell me how to solve it?

I have a besement with 2 meters below ground. Is the slab of this besement floor(-2m) a slab-on-grade? Is the slab of the basement ceiling a slab-on-grade? (assuming the ceiling slab is level 0m with thickness 200mm). Which is slab-on-grade?

How to define basement walls in HAP(Hourly Analysis Program)? I know how to input data for space above ground, but how to do it for basement walls?

When i draw a 100000mm line, it always goes beyond limit of screen. How to set up CAD to get scale 1:1? I mean, in command line, how i can input line and 1000000 to get the line?

How can I get the VOC concentration from FID- and calibration curve? Is there some procedure? What's the relationship between Chromatogram and FID response?

Who can tell me what's the difference between BIN method and degree day? What's the cons and pros for each of them? Thanks! I know sth, but i cannot find what;s the good point and limitation for each of them.

I know ABB has this TopVent system for garage ventilation. But i cannot find some details there. Who know it more? The topvent uses induced fan and air jet. Thanks!

Induced fan cooling tower and forced fan cooling tower should be maintained. How to maintain them? Some common actions I think not right.Someone just uses high speed water flow to wash cooling tower flash fill or film fill. But this makes dirty things into the water. I cannot find good way to...

Can i use hot water/fan heater in garage ? I have hotwater from rooftop. Mostly for garage heating, what heater is better? But i didn;t find this device on net. Can u give me some idea?

airpak is useful for hvac system?

Airpak is good for HVAC ?

Someone knows Airpak 2.1? Is it good and useful? I heard of it, but I don;t have chance to use it. Really bad.