Hello Ivan,
You mean the baseline model Rooftop or just an external condensing unit?
If is an external condensing unit (Like VRF ou split units) is the table 6.8.1B, but if you're looking for the baseline Rooftop Unit you could use the 6.8.1A table.
Best regards,
Bruno Scalet
Técg. Ivan Mezzacapa
Projetista de Ar Condicionado / Consultor em Eficiência Energética