Recent technological advancements in HVAC manufacturing have made dedicated outdoor air systems (DOAS) easier to specify and install for contractors.

Pre-engineered rooftop ventilator models RV-110 and RVE-180 with energy recovery offer capacities up to 18,000 cfm, up to 70 tons of packaged cooling and 1200 mbh indirect gas-fired heating. 

A St. Louis high school has a new, green HVAC system, thanks in part to a local contractor.

Johnson Controls has extended its trademarked TempMaster line to include OmniElite single-package rooftop units, which are available in 50- to 65-ton cooling capacities.

Thybar Corp.’s laser-cut custom bases were designed for the secure mounting of rooftop equipment.