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http://www.idecz.com/category/Portable-Air-conditioner/ Here's How To Make A DIY Air Conditioner That Will Actually Keep You Cool
swamp cooler Evaporative Cooling (Swamp Cooler): water is dropped over pads or tubes that circulate outdoor air or water. • Free water evaporates to vapor and the heat is drawn from circulating air or water to disturb to indoor spaces • Works well in hot-arid climates with low humidity • Simple to construct • Requires no refrigerant line • Even though a change in total heat occurs, evaporative cooling is accompanied by an increase in relative humidity.
Core drilled "poke-thru" outlets have been found to allow the passage of "cold smoke" through floor slabs in violation of their code approvals. Cold smoke occurs when smoke moves away from the point of fire to other areas of the plenum space. Cold smoke may not expand the intumescent rings designed to seal the poke-thru outlet against smoke penetration.
High Efficiency Gas Furnace diagram.
Infographic: Cleaning HVAC Systems for Commercial Properties A clean HVAC system operates more efficiently and can lower energy costs. Cleaning mold, fungi, dust and other contaminants from your system will result in less wear and tear on your equipment and create a healthier environment for occupants. https://www.lowesforpros.com/articles/infographic-cleaning-hvac-systems-for-commercial-properties_a6302.html
Knowing your air conditioning systems are beneficial in the respect of saving energy bills and maintenance cost.
Mid-Efficiency Gas furnace diagram.