A small-duct high-velocity system was used in this Johns Island, SC house. The ducts vents can hardly be seen. The house was designed by Architect Sam Rashkin. Energy Star estimates that 20% to 30% of ...

The heat and humidity are killers this year. I need a central air conditioner that is quiet and controls the humidity level. How effective and efficient are mini-duct and high-velocity systems?

For the past 50 years, engineers have been “designing” duct systems. Quite often, they were not actually designing the systems, but were sizing duct the duct according to some rule of thumb. The rules ...

Airflow velocity in a residential HVAC market duct system is an important design consideration. Although designing for proper velocity applies to all ducted HVAC construction systems — heat pumps, air ...

Dear Jim: After the heat wave we have had recently, I think we need to add central air-conditioning. We have electric baseboard heating, so there are no ducts. What are the simplest central system ...