HVAC & Ventilation

Discover expert guides on HVAC sizing, ductwork framing, mini-splits, and ERV systems to plan, frame, size, vent, and balance home heating and cooling

A hand adjusting a balancing damper lever on a galvanized duct branch in a basement ceiling

InteriorHVAC & Ventilation9 min read

Fix Hot and Cold Rooms With Filters, Registers, and Dampers

A step-by-step guide to balancing a forced-air system: a filter that does not choke airflow, trunk dampers, register tuning, and fixing return-air paths.

Gloved hands brushing gray duct mastic onto the joint where a round branch duct meets a rectangular trunk line

InteriorHVAC & Ventilation10 min read

Seal and Insulate Your Ducts for Rooms That Finally Heat

A step-by-step guide to sealing accessible ductwork with mastic, fixing leaky boots and takeoffs, insulating runs, and measuring the results at the register.