Get your AC system to perform more efficiently

unvented atticAn example of a common 2,000 square foot home with a 4 ton A/C system with typical duct-work leaking a conservative estimate of 25% in a vented attic:

When this 4ton air-conditioning system is running 400 cubic feet of air per minute (25% x 1,600cfm) will be forced out of leaky duct-work into the attic. With a vented attic this means that the energy consumed to cool this 400 cubic feet of lost leaked air every minute is gone for ever… every minute the unit runs. But it is a double whammy!!! Not only did we lose this 400cfm that we just paid the utility company to cool and dehumidify but we also depressurized the house by this same amount. Therefore, the house is sucking in 400 cubic feet of outside summer moisture-laden air every minute while our 4 ton air-conditioning system (which is now operating like a 3 ton unit since each ton of A/C equals 400cfm and we “lost” one ton through leakage) now has to work over-time to cool this additional “sucked-in” air AND remove the moisture from it which contains roughly twice the amount of energy than dry air contains.

Simply speaking, our 4 ton system is behaving like a 3 ton system and we paid to lose a ton of air every minute while paying again to cool and dehumidify another ton of outside air every minute. And since this outside ton of air is full of moisture then we can comfortably assume that this ton of air is holding roughly two tons worth of energy that needs to be removed by our now 3 ton A/C system. Hence the reason why correctly spray foaming and enclosing the attic can actually cut our summer months’ bills in half, and possibly more in extreme cases, while allowing this 4 ton AC system to operate like an actual 4 ton system.

EnviroGreen has many case studies where homeowners’ AC units would continuously run – sometimes all day non-stop – and were unable to cool their homes to desirable temperatures. Many were faced with spending $6,000 to $10,000 on a new air-conditioning system and duct-work because the current system was slightly under-sized, the duct-work was leaky, or the cooling capacity and efficiency decreased over the years.

After EnviroGreen foamed and properly sealed the attic these homeowners no longer experienced a need to replace their HVAC systems and duct-work, and paid only a fraction of the cost of doing so. Foaming and sealing their attics actually created an optimally cooler and tighter environment for their AC systems to operate in and allowed them to perform more effectively and efficiently.

Finally, when creating an un-vented enclosed attic assembly EnviroGreen pays specific attention to possible combustion needs that may exist, additional potential sources of moisture that may require venting out of the attic, and consideration of how to handle existing insulation on the attic floor if any. Addressing these concerns are part of every spray foam proposal.

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