FAV Systems. has developed the FAV-WG-TDU. This unit is a vertically fired, no visible flame, ceramic lined combustion chamber with a multi-tipped burner arrangement. This unique burner design and configuration produces an efficient and very quiet burning combustion flame. We can achieve these features by utilizing a ceramic coated burner, velocity breaker and combustion zone stabilizer combined with precisely sized air intake throats to supply the right ratio of combustion air to each individual burner. These systems also have a very good turn down ratio for fluctuating flow conditions.