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Our UVGI for HVAC technology delivers 10-20% in energy savings.
Below are the methods used.

Method 1. Perpetually Clean Cooling Coils.

A degradation in cooling coil performance is caused by:

bullet Forcing air through very confined spaces in air conditioning coils. The average amount of fins-per-inch in a cooling coil is twelve but can increase in ever smaller a/c systems creating a very restricted space for large volumes of air to move.
 
bullet The spaces between a/c fins is an ideal breeding ground for bio-films to grow (mould and bacteria), blocking the free flow of air.
 
bullet Mechanical cleaning methods damage the fins and don't work because they push bio material into the middle of the coil causing a reduction in heat transfer to the fins. They are also a temporary fix as bio-films grow back with in weeks until the next clean which is normally months apart. 
 

 

Fins Fouling
Thickness

0.16mm (0.006”)

0.31mm (0.012”)

0.61mm (0.024”)

0.92mm (0.036”)

1.63mm (0.064”)

 

 

A/C Efficiency
Loss

16%

20%

27%

33%

50%

Our UVGI for HVAC Comprehensively cleans coils 24/7, 365 days per year.

bulletReturns the a/c coil to "as built" specification.
 
bullet Typically savings of 10-20% can be achieved.
 
bulletDoes not damage the coil fins.
 
bullet Full payback in 18-24 months.

Case Studies

Boston University

 “In addition the perpetually clean coils are more energy efficient.  Between the maintenance and energy savings the lights definitely pay for themselves.”

Case Study

American Electric Power 

bullet “Estimated saving of $139,000 in annual energy costs in 2 + years”.
bullet “Amounted to 15% savings.”
bullet“Cut back from four 300-ton chillers to two.”

Case Study

Southern California Air Conditioning Distributors (The worlds’ largest Carrier distributor) 

bullet“The pressure drop across the coil decreased by over 30%.”
bullet “The airflow increased from 16,000 CFM to 17,400 CFM.”
bullet“30% increase in cooling capacity from 548,502 BTU to 797,094 BTU.”
bullet “The devices ability to increase system performance to almost “as new” levels is expected to prolong the life on mechanical equipment“.
bullet “Potential Horse power savings should not be ignored especially for those who utilise VAV drives.”

Case Study

Florida Hospital 

bullet“Within weeks of installing the UVC the air velocity across the coil more than doubled from 230 fpm to 520 fpm.”
bullet “The wet bulb temperature decreased from 57°F-53°F.”
bullet“We calculated the increase in capacity to 95,245 BTU saving $4,867 on an investment of $2,000.”
bullet "The hospital is conservatively saving 15% in HVAC system energy costs.”

Case Study

Method 2. Enabling more air to be re-cycled.

Many engineering professionals know that this can cause IAQ (Indoor Air Quality) (indoor air quality) problems leading to a rise in staff infections.

In this scenario our UVGI for HVAC systems act as a counter weight, sterilising the recycled air thus offering a significant energy saving, please see our latest case study.

Tacoma Jail
 

bullet “Reductions in air changes resulted in decreased heating costs.”
bullet “We have saved more than $70,000 in natural gas by reducing our outdoor air requirement”
bullet“Even after we subtract for servicing and changing UVC lamps, annual savings still exceed $55,000.”

Case Study   

Independent Test Results

presentation.

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