non-condensing
/ˌnɒnkənˈdɛnsɪŋ/adjective
1Not involving the condensation of steam; specifically designating a steam engine in which the steam on leaving the cylinder is not fed into a condenser but is either reused in some other way, or discharged into the atmosphere.
2That does not undergo or cause condensation.
Origin
Mid 19th century; earliest use found in Journal of the Royal Statistical Society. From non- + condensing.