GauVendi differentiates between 4 types of room products: 

1) Personalized Units (RFCs)

2) Virtual Room Products (ERFCs)

3) Combined Unit (ERFC Deduct All)

4) Category (MRFC)

ERFCs are virtual room products allowing to sell the same physical rooms in various combinations. There are two main types of ERCs. 

a) Combined Unit also known as"ERFC Deduct All"; selling a room combination as whole. For example 2 rooms next to each other as a family combination etc.

b) Virtual Room Products :"Deduct"; selling the assigned rooms individually with assigned features