Would a bigger Fan/Blower Help?
Would a bigger Fan/Blower Help?
(OP)
I'd like more airflow from my home AC/Furnace. Easiest would be to put in a bigger fan and blower. My guess is that the exchangers are probably optimized for the motor and blower already installed so my heating and/or cooling power might not increase with the increased air flow. Any thoughts?





RE: Would a bigger Fan/Blower Help?
check filters and any other possible restrictions in duct system and the airflow may likely increase some; yet not impact the heating/cooling capabilities too much.
good luck!
-pmover
RE: Would a bigger Fan/Blower Help?
From there the manufacturer probably established a recommended range of acceptable airflow or total external static pressure.
The first question to ask is: Is your system operating within that range?
RE: Would a bigger Fan/Blower Help?
TTFN
RE: Would a bigger Fan/Blower Help?
RE: Would a bigger Fan/Blower Help?
TTFN
RE: Would a bigger Fan/Blower Help?
TTFN
RE: Would a bigger Fan/Blower Help?
RE: Would a bigger Fan/Blower Help?
TTFN
RE: Would a bigger Fan/Blower Help?
Most, but not all heater/air conditioning blower motors are multi-speed. Suggest you seek (its a simple terminal change) if you have multi-speed type and switch to the highter speed to see if thats helps. Speed (RPM) is directly proportional to CFM. Double the speed = double the CFM.
You may still can realize some loss of cooling through the coil due to the higher air velocity. But you are ex-changing the air at a greater rate. Also...You may not be as cool but you feel cool because you feel a movement of air around you a "perceived coolness" so to speak. "Comfort is perceived"
NOTE: Horsepower increases by the square so the cost of moving that air increases. In winter switch back to lower speed to prevent occupents fron feeling stiffeled from heated air blowing around them.
Give it a try!
Best regards
pennpoint
RE: Would a bigger Fan/Blower Help?
Which system seems not to be working well, heating or cooling?
If you want to bump the fan speed, something must not be working.....else you'd leave the fan alone.
RE: Would a bigger Fan/Blower Help?
RE: Would a bigger Fan/Blower Help?
We lived without A/C in our house for three years prior to getting the A/C. Big ass fans moving lots of hot air around is marginally better than hot still air. Particularly if it's so hot that your perspiration evaporates immediately before you feel a wind chill effect from the moving air. Desert climes like Tucson and Las Vegas are like that. The hot wind really doesn't cool you down much.
If your registers don't whistle, then I'd agree that your air flow is insufficient.
How's the suction on the inlet side? Is the inlet grill blocked for some reason? Your fan should be capable of suctioning heavy cardboard against the inlet grill.
Have you replaced your filters?
Can't imagine anyone selling you an undersized fan when there's such a temptation to sell you an oversized fan
TTFN
RE: Would a bigger Fan/Blower Help?
Even better would be a VFD (variable speed drive), but there are control issues for the heating unit.
Make sure the entire system is clean before you make the changes....could be dirty filters.....
RE: Would a bigger Fan/Blower Help?