Attic and Workshop Fans:
Ventilation for Attic Space Residential, Commercial, Industrial.
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Roof & Gable Attic Fans,
facts, prices and answers for your questions.
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Prices, options and alternatives on the various types of ventilation
and systems that will work best.   Estimated costs by email.

Even if you buy it online, we'll install it for you. We are the ventilation experts and we explain everything.
Ventilation for Commercial and Industrial Properties.

>>> We offer Bucket Truck Installations (less roof & gutter damages).

FACT - The mushroom style attic fan lowers the overall cost of cooling. FACT - A whole house fan will pull fresh air in, and vent it out through the attic at less than half the cost of air conditioning.
The Able Group Contractors - Ventilation Experts for Home, Business and Industrial Facility.
My services begin with good information, a good price, then a job well done.
Attic Fan Costs - includes equipment, thermostat, installation & electric circuit:
Initial Service, Set-up, Property Evaluation: $80.00.
1170 CFM 1/10 HP Roof Mount Mushroom Fan with Bug Screen, $475.00.
1320 CFM 1/8 HP Roof Mount Mushroom Fan with Bug Screen, $515.00.
1500 CFM 1/6 HP Roof Mount Mushroom Fan with Bug Screen, $585.00.
1600 CFM 1/5 HP Roof Mount Mushroom Fan with Bug Screen, $625.00.
Replacement of an existing unit,  Minus -$50.00 to reuse the electrical circuit.
Travel Charges may be additional.  Contact us and include your address.

NOTES:  Under normal conditions the job takes approx. 3.0 hours to complete.  These units include an automatic thermostat which is adjustable as per conditions.  An access opening into the attic is required. A power switch can be installed at any convenient location at an additional cost, but is not required.  Our one year warranty includes the unit and the opening created in the roof.

Whole House Fans - Ventilate for cooling.

There are a wide variety of types and systems.  They can be mounted just about anywhere (ceilings, closets, crawl space, attic, etc. They are typically located in a central area to help evenly remove warm air from the living space. When a whole house fan is turned on it helps draw warm air out of the living space while drawing in cooler outside air from open windows.

Sizing a whole house fan -   Whole house fans are sized in cubic feet per minute (cfm) of ventilating power. To determine the size you'll need, first calculate the volume of your house in cubic feet. To do that, multiply the square footage of the floor area you want to cool by the height from floor to ceiling. Take that volume and multiply by 30 to 60 air changes per hour (depending on the power you need). Then, divide by 60 minutes to get the cubic feet per minute of capacity your house requires:

(Square feet ______ room height ______) 30 or 60/ 60 = cfm required _________.

       Installing and using a whole house fan   -   Installing a whole house fan is tricky and should be done by a professional. An experienced professional should perform your attic measurements and install your dedicated circuit wiring and, if needed, your new attic vents. Attic ventilation will usually need to be increased to exhaust the fan's air outdoors. You'll need 2 to 4 times the normal area of attic vents, or about one square foot of net free area for every 750 cubic feet per minute of fan capacity. The net free area of a vent takes into account the resistance offered by its louvers and insect screens. More vent area is better for optimal whole house fan performance.

If your fan doesn't come with a tight-sealing winter cover, you should either buy one or build one. If you switch between air conditioning and cooling with a whole house fan as the summer weather changes, build a tightly sealed, hinged door for the fan opening that is easy to open and close when switching cooling methods.
Be cautious when operating these large exhaust fans. Open windows throughout the house to prevent a powerful and concentrated suction in one location. If enough ventilation isn't provided, the fans can cause a backdraft in your furnace, water heater or gas-fired dryer, pulling combustion products such as carbon monoxide into your living space.

Gable Attic Fans - are mounted to the gable wall inside the attic behind a decorative louver. The gable attic fan is connected to a proper power supply and a timer. The timer allows the fan to run during the hottest portion of the day. The gable attic fan helps reduce the attic temperature to help prevent heat transfer down through the insulation and into the living space. Gable attic fans are typically much cheaper than whole house fans and also easier to install.

WHIRLYBIRDS The correct term is "air motor" , also called roof turbines. It is thought that the spinning turbine creates some sort of suction which induces air movement. This has not been proven. These are called "air motors" as they are used in large commercial applications for venting of smoke and fumes from a manufacturing plant. The wind spins the turbine which is connected by a shaft to a fan blade below which spins and pulls the air from the building. Turbines used in the residential market do not have these fans and therefore can exhaust only what the roof opening dictates. Pi times the radius squared equals the area. A 10" unit offers 78.5" of free net area, a 12" 113" square inches. Venting an attic using natural aspiration is based on free net area. Use this to calculate the sizes of intake vents (soffit) and exhaust vents (at the top of the roof). We recommend Aura Vents for natural venting Despite the small area of these vents, the vertical stack of this vent allows for the fastest flow of air from a hot attic. For best performance, these vents should be placed as close to the peak of the roof as possible.

That's why we are "The Able Group"

The importance of venting your attic cannot be overlooked. In cold climates, improper venting can lead to moisture buildup which causes mold to grow, wood rot in extreme cases or even ice in the attic insulation. During the summer, stagnant, superheated attic air can dry out your trusses, increase your energy costs for air conditioning and make your house uncomfortable. Ask us about Ventilation equipment, ventilation installation, ventilator service, rooftop ventilators, restaurant ventilators, restroom ventilation and the construction required in Delaware County, Main Line, Philly, fans, whole house fans, belt driven, gable mounted, ventilation, ventilators, cooling, attic fans, fresh air, Broomall, Philadelphia, Newtown Square, Havertown, air, Bryn Mawr, Lower Merion, PA. Ventilation Systems, Quiet Breeze,  Low cost fresh air - Attic, Bedrooms, Sunroom, Kitchen, Family Room.
Fans, Fans, Fans .... Estimates Online by The Able Group Contractors.
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Other Types of Attic Ventilators for Special Conditions.

Bucket Truck Installations for everything.

The Able Group Contractors - Ventilation Experts for 25 years giving folks more info on: attic fans, ceiling fans, whole house fans, cooling equipment and ductwork, commercial wall mounted fans, belt driven wind makers, gable mounted fans, kitchen ventilation, rooftop ventilators, crawl space air vents, spray booths, fresh air ventilators, make up air, restroom ventilation, energy efficient air conditioners, thermostat control, humidistat control and do it yourself installations.