DENVER, CO — It’s a sunny 65-degree afternoon here. On the Linton Tower building, two rooftop heating and cooling units are keeping the building comfortable.
One rooftop unit is a classic 1970s vintage multizone unit. It’s simultaneously running, one stage of mechanical cooling and one stage of gas-fired forced air heat. It is a multizone system. Typical of multizone units, it is mixing heated and cooled air to satisfy the varying requirements in each zone.