[Bldg-sim] Gas fired packaged roof top HVAC - one stage or two

[Chris Jones]

I am modelling a small building with packaged roof top units with gas 
fired heating sections.  The units have a two stage option available 
but the product literature does not include any efficiency numbers to 
compare the single stage to the two stage burners.  Any thoughts?





Chris Jones
14 Oneida Avenue
Toronto, ON M5J 2E3.
Tel.  416-203-7465
Fax. 416-946-1005