Sizing Roof Top Units

What size rooftop unit will meet the load and deliver the desired supply air temperature.

Sizing roof top units.

Since 12 000 btus equal 1 ton an air conditioning unit rated at 3 tons can produce. Combining industry leading efficiency with fast easy installation and service lennox continues to offer reliable systems that deliver exceptional comfort in commercial buildings. The purpose of a rooftop unit is to distribute conditioned air within define areas of a building. Rooftop units in the 5 pro core 20 and 40 series are smart equipment enabled or smart equipment optional.

A btu or british thermal unit is the amount of heat needed to heat 1 pound of water one degree fahrenheit. Weatherexpert units available in 3 23 ton sizes use multi stage compressors a single refrigerant circuit and sav staged air volume logic to provide part load efficiencies that lead the industry. Now in our last tutorial we looked at air handling units or ahu s. The carrier weatherexpert packaged rooftop unit series provides comfort and energy efficiency never seen before.

Rooftop units are connected to ductwork which provides a defined route for the conditioned air to travel along. Though btus are important most larger air conditioning units are rated in tons. Lennox packaged rooftop units represent some of the most innovative technology in the market. Select johnson controls rooftop units are smart equipment enabled meaning they already have controls embedded and can seamlessly connect to a controls system and self discover other smart equipment.

Besides meeting the space cooling load sensible plus latent the unit must cool outside air and overcome fan heat.