| 摘要 |
<p>An apparatus for raising the temperature of air in an environment comprises a heater, a mixing chamber, an ambient air fan and at least one vortex generating element. The heater heats ambient air and delivers so heated air to the mixing chamber and the ambient air fan delivers ambient air into the mixing chamber. The mixing chamber includes at least one outlet and one of the at least one vortex generating elements is associated with the at least one outlet.</p> |
