(Courtesy of Ductz) “You can clean just your trunk and branch lines, but you should also be cleaning the ... have a recommended inspection schedule. To maintain an efficient HVAC system, NADCA ...

What some HVAC sales contractors do not realize is how much duct velocity contributes to airflow resistance. For example, many in the HVAC construction business think a trunk reduction is needed to ...

We have electric baseboard heating, so there are no ducts ... The insulated room ducts run off this trunk duct or from other secondary smaller trunk ducts to the room outlets.

We have electric baseboard heating, so there are no ducts ... The insulated room ducts run off this trunk duct or from other secondary smaller trunk ducts to the room outlets.

We have electric baseboard heating, so there are no ducts ... The insulated room ducts run off this trunk duct or from other secondary smaller trunk ducts to the room outlets.

Greg McAfee started his heating ... of dust in the duct work, McAfee said. “A lot of it you’re not going to see from the original register, but on down in near the trunk line where it actually ...