DJ Cravens <[email protected]> wrote:
> I am trying to look at air flow heat measures - and it looks like a bear. > It was awful! A nightmare. Look at the difficulties of making a wind tunnel work, then add to that a whole bunch of other factors. HVAC engineers do measure the heat flow from forced air central heating systems. I am not saying it is impossible. But they can only make a rough approximation. That's okay; they have no use for precision. The room temperature is precision controlled by the thermostat, and that is what matters to the people in the building. The exact amount of air it takes, and the exact amount of heat that is transferred from furnace to the room do not matter much. An approximate answer is good enough to improve efficiency. - Jed
