ms total employees annual range past 5 years metric code total employee number latest data point ycp ms total employee number last 5 data points ycs ms total employee number 4
A plenum space is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated/conditioned or return airflows, usually at greater than atmospheric pressure.
Search form. Plenum Heater. An electric plenum heater can convert your existing natural gas, propane, or oil furnace into a dual fuel heating system. An electric plenum heater gives you the ability to take advantage of the low-cost dual fuel electric rate and the flexibility to use the most cost-effective heating source at any time.