Attic Fan Vs Insulation

Loose fill or batt the common term for blanket insulation.

Attic fan vs insulation.

If we assume that the outside air is 10 f warmer than the desired. The downside of attic ventilation fans. Good insulation reduces fan effectiveness. In most cases it is not difficult to air seal and insulated an attic.

Insulation or lack of it air leaks soffit vents the stack effect ridge vents attic fans recessed lights pull down stairs radiant barriers and all the ducts and or hvac equipment frequently located in attics. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool. Even though an attic exhaust fan can incrementally lower the temperature of a very hot attic using a fan does not stop the source radiant heat. Heat conduction from the attic to the house is proportional to the temperature difference divided by the r value.

Get the basics in your attic right and you will not need to invest in radiant barriers attic fans or more insulation. Without any air movement temperatures in the attic soar in summer and plunge in winter. However the utility of attic ventilation fans is actually quite a controversial topic. Lowering attic temps it is not an accurate statement to say that if you have good insulation you don t care what the attic temperature is.

The alternative would be to install an attic fan that would draw cooler outside air into the attic while expelling the hot air. Both can be added to uninsulated attics or layered over existing material. This complexity is easy to appreciate when you consider all the attic features that factor into energy performance. For diy attic insulation you ve got two choices.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Without ventilation unfinished attic spaces can end up having stagnant air. Most fans cannot keep up.