It forces air through the system and through specialty heating coils. This warms the air while it is moving so that can be pushed to the rest of the house more effiecently.
A blower heater works by coils and a fan. When the heater is powered, the coils will heat up from the power, the fan begins to turn and will distribute the heat.
Well it basically just blows in air gradually into the room and lets the room get heated more quickly than a regular heater. You can get some great ones from Delonghi company.