To save on downlight installation costs, get quotes from lighting suppliers first and ask them if they have in-house licensed installers. If they do, you may be able to get your downlights at a discount. If you get quotes from electricians in your area, you can ask for supply and install quotes, but it might be better to buy your downlights and have them ready for the electrician when they arrive at your home.
Answers.comÂ® is making the world better one answer at a time. SCFM is the amount (volume) of air that would happen if your air were at room temperature, and atmospheric pressure (0ft above sea level, 14.7psi). CFM (cubic feet per minute) is the amount (volume) of air that happens at the specific temperature and pressure.
It is similar but has a different method for maintaining output. It does not control CFM output as well as an ECM and is a lower quality motor. you're mixing up Variable Speed vs. ECM. ECM is the motor technology.Variable Speed is the buzzword for Constant CFM control technology. X-13 is an ECM motor with a constant torque controller. it's not a lower quality motor.he X-13 is not an ECM motor. It is similar but has a different method for maintaining output. It does not control CFM output as well as an ECM and is a lower quality motor. EDIT: Yes, oversizing the furnace DOES affect efficiency.