Modine MCV and MVV models are direct-fired make-up air units. Designed for 100 % fresh air application, they are available with either a constant (MCV) or a variable (MVV) speed blower. These units are interesting for their high thermal efficiencies close to 100%.

By directly heating the make-up air by a gas flame, the need for a heat exchanger is eliminated, as well as the efficiency loss that goes with it.  It is designed to provide value through best-in-class features to simplify installation and reduce maintenance costs.