Thanks all for your posts. I ended up putting direct drive fans with ECM motors. I was able to slow them down 30% because the exhaust from the toilet rooms was above ASHRAE 62.1-2010 requiments. I was also able to change out the pulley on the 100 OA Unit to slow it down about 30%. The system...
Can someone help on the question below?
If I change from a Belt Drive Roof Top Centrif Exhaust Fan to a direct drive will I save energy? See details
Old Fan: Motor RPM 1800, 1/4 hp and Fan RPM 1000
New Fan: Motor RMP 1000, 1/4 hp and Fan RPM 1000
The new fan has an ECM type motor that...
Thanks for your help, acually I will put a return air grill in the closet door to make sure I have the correct clear area. I was thinking of lower CFMs (toilet exhaust) for the door under cut.
And we are the south so the heatpump should be a good solution.
Thanks for your help all.
I have a 16" wide by 22" deep heat pump fan coil unit (upflow). I want to intall in a closet with a 24" door. The closet is 36" wide and 26" deep.
My thougt is to place the units left edge at he left edge of the door, so the control panel can have clear access. The line set connections can be...
I dont work with residental HVAC designs much.
I have a 800 SF unit with 3 exposed walls (r-6 wall, r19 attic insul). I can up with 1.3 tons (about600 sf/ton).
I used .7 watts per SF lighting and .5 watts per SF plug load. Are these reasonable values for a residental unit?
Is the overall...
I will let you know. The challenging part is calculating energy savings. If the system does not have a lot of simultaneous heating and coolng requirements the savings may not be all that great. It may be a good case for a Carrier HAP or Trane Trace energy model.
Does anyone have a good source that covers the retrofit options to make a Multi-zone unit (hot deck and cold deck sytems that mixes the two air streams to condition a zone)more efficeint? There must be some good info out there but I have not found it yet. I have seen the hot deck disabled and...
