Air duct work in Seguin, TX

On the ground in Seguin

Seguin holds two housing stocks that call for opposite work. A third of the city sits in the older grid near the square and the blocks below it, frame houses built before central air existed as a category, so the system went in decades later and the ducts took whatever void existed: a shallow attic with no headroom over the back rooms, a crawl space under the original block, a chase boxed into a closet corner. Return air is where those houses give out. One hallway grille was considered sufficient then and it is still the only return in many of them, so the blower works against a starved return and makes up the difference by pulling attic and wall-cavity air through every unsealed boot it can find. Out along the farm roads the picture reverses, with twenty years of subdivision building where the trunk lines are fine and the only debris arrived with the drywall crew. Factory-built housing accounts for a meaningful slice of the city as well, and in those the supply trunk sits in the floor cavity rather than overhead, so the register at your feet feeds a duct that cannot be reached from an attic at all. Very few addresses here have gas at the equipment, so what we open is nearly always an air handler with the coil seated directly over the supply plenum, and that coil is the one surface in the system that stays wet.