Dewalt DXH165 

BTU's: 5.5 K

CFM's: 120

Power Source: 120V

Amperage Draw: 12.5

Width: 10"

Length: 14.25"

Height: 13"

Weight: 14 LBS

Patron - E1.5    

BTU's: 5 K

CFM's: 116

Power Source: 120V

Amperage Draw: 12.5

Width: 8"

Length: 14.5"

Height: 12"

Weight: 14 LBS

please view links below for NEMA connector info 

NEMA Chart

20-30AMP WIRING INSTRUCTIONS

20-30AMP LOCKING PLUG AND CONNECTORS

HOW MANY BTU'S OF HEAT DO YOU NEED?

CALCULATE HERE : Heat Requirement - Cantherm Distributors