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USING BIG ASS FANS TO IMPROVE ENERGY EFFICIENCY

Cooling with air conditioning

Thermal comfort is how comfortable an occupant feels in a space. Many factors influence thermal comfort some are in your control, and some are in ours.

thermal comfort

Six equally important factors determine your overall thermal comfort, as defined by Standard 55

To comply with ANSI/ASHRAE Standard 55, you must be within the following ranges:

PMV: -0.5 to +0.5

Predicted Mean Vote: Most people in the room should say that they feel thermally neutral.

PPD: <10%

Predicted Percentage Dissatisfied: Less than 10 percent of occupants should be dissatisfied with the comfort level of the space.

Source: CBE Thermal Comfort Tool

Source: CBE Thermal Comfort Tool

Combining A/C and fans means increased energy efficiency without sacrificing comfort.

Air conditioning is great — but it’s expensive and can be horrifically inefficient. Big Ass fans work with air conditioning systems to make them more effective. The fans use a fraction of the energy of HVAC systems, thereby reducing overall energy consumption.

By incorporating Big Ass fans into building automation systems and using controls, energy savings become easy and automatic.

Increased air movement from Big Ass fans makes occupants feel cooler, allowing designers and users to raise thermostat setpoints without sacrificing comfort. Each degree offset reduces HVACrelated energy usage by approximately 9 percent.* Credit can also be earned for elevated air speed in designs that exceed the minimum requirements of Standards 90.1 and 189.1.**

*US EPA & DOE Energy Savings Calculator **ANSI/ASHRAE/IES Standard 90.1 and ANSI/ASHRAE/ USGBC/IES Standard 189.1

Cooling without air conditioning

In addition to unhappy occupants, it’s hard to work when you’re too warm – health suffers, and so does productivity. It sounds intuitive, and it’s backed up by science.

Seppänen

Increased air speed takes advantage of the body’s natural cooling process to create a cooling effect.

Big Ass fans are incredibly effective and efficient. Plus, they don’t take up floor space like pedestal fans, and they’re not loud like box fans.

COOLING EFFECT FROM ELEVATED AIR VELOCITY

WINTER ENERGY SAVINGS AND DESTRATIFICATION

In the winter, heat rises and can get trapped at the ceiling, leading to huge temperature differences and massive heating bills.

Fans aren’t just for cooling. Big Ass fans operate slowly in the forward direction, thoroughly mixing air without creating a draft. Air velocity at the floor does not exceed the limit for draft set in Standard 55 (9 metres per minute or less), so there’s no need to reverse the fans. The result is up to 30 percent savings on winter heating bills.

Winter heating, with and without Big Ass Fans

IMPROVING VENTILATION AND IAQ

When supply and return vents are located at the ceiling, it’s difficult to distribute heated air throughout a space.

Big Ass fans can improve zone air distribution effectiveness by pushing hot or heated air down to occupant level, helping reduce fresh air intake by 20 percent without a negative effect on indoor air quality (IAQ).

Without overhead fans (left), heating systems need to supply more outdoor air into a space to maintain adequate air quality. With fans (right), air is distributed more effectively into the breathing zone

Comfort Solutions - Industrial

AIRFLOW, EFFICIENCY, AND A BETTER EXPERIENCE FOR YOUR HOME OR BUSINESS.

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Give us a call at 028.73033369, or request a quote to learn more about the most efficient comfort solution for you.

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