recovery Wheel Calculations
recovery Wheel Calculations
(OP)
I want to make a manual calculations for air to air energy recovery unit. I have the amount of exhaust air and supply air.
how to make this calculations according to ASHRAE standard 90.1 2007 requirements.
how to make this calculations according to ASHRAE standard 90.1 2007 requirements.





RE: recovery Wheel Calculations
A nominal 2000 cfm ERV can operate at 1000 cfm in and 1600 cfm out, with 2000 cfm balanced etc.
I think what you really want is go to the manufacturer's website and use their tools. I'd think nowadays all manufacturers have soem doftware to calcaulte that at any condition.
RE: recovery Wheel Calculations
knowledge is power
RE: recovery Wheel Calculations
RE: recovery Wheel Calculations
RE: recovery Wheel Calculations
RE: recovery Wheel Calculations
Same for insulation. I see the buildings that never anywhere meet code. But according to Comcheck it ia all good and they get approval.
I think it is time AHJ is required to actually have some engineering knowledge and use computers....
RE: recovery Wheel Calculations
RE: recovery Wheel Calculations
The reviewer probably has a good reason to suspect your design, and I must say he is right, cause rightly so, you do not know, you did not do any calculations and yet you are signing and stamping in your permit application.
You cannot rely on a vendor numbers, you have to check and verify the vendor numbers.
I can think of one reason:
One of your air sides temperatures (exhaust side) may be below the freezing point in winter, which will freeze your wheel and he wants to see that it is safe to operate your wheel or provide heat trace or some type of control.
RE: recovery Wheel Calculations
It's like using boier efficiency... i use manufacturer numbers and don't do my own tests.