I can’t offer any specific source or authority but it is commonly accepted that belt drives that are properly aligned and tensioned and that operate continuously last longer than belts that are subjected to the stress and strain of stopping and starting. Motors with Variable Frequency Drives...
That is correct. Typically for residential units you select the furnace based not on its heating capacity but on the air delivery for cooling and the size cooling coil that matches the cooling load. This will result in a furnace heating capacity that can be two or three times the heat load...
The air control experts in our region advise against using automatic air vents in a closed hydronic system. Automatic air vents have a reputation for getting trash (rust, scale etc.) in their ports and sticking in the open position thereby turning your closed system into an open system with air...
For tapping a rectangular low pressure duct with a round branch duct a conical spin in tap is the way to go. Try to avoid a round 90º tap without the conical fitting, you need the evase to ease the air as it turns the corner, the hard 90º edges create a lot of turbulence in the branch which...
