Energy Saving HVAC Tips

According to the US Department of Energy’s Federal Energy Management Program, air filters play a critical role in maintaining indoor air quality and protecting the downstream components of the cooling equipment (coils, blower, etc) from accumulating dirt that reduces equipment efficiency.  Dirty filters force air to go around filtration sections and the unfiltered bypass air deposits diet on the cooling/heating coils rather than on the filter.  Routinely change or replace filters based on either regular intervals or by visual inspection.  Intervals can range from 1-6 months, depending on the dirt loading from both the indoor and outdoor air.  In commercial facilities, measuring the pressure drop across the filter is the most reliable way to rate dirt loading on the filter.

 A dirty evaporator coil will reduce cooling capacity and degrade equipment energy efficiency.  A clogged evaporator coil reduces air flow through the coil, causing the compressor motor to consume more energy,  Exposed to unfiltered outdoor air, condenser coils easily trap dust and debris, raising the condensing temperature and reducing the cooling capacity.   According FEMP, a Pacific Gas and Electric (PG&E) study showed that a dirty condenser coil can increase compressor energy consumption by 30%.    The evaporator coils and condenser coils should, be inspected at least once per year for clean air-side passage.  Replacing filters on a regular basis will also keep the evaporator coils relatively clean.
FACT: According to FEMP, a dirty condenser coil that raises condensing temperature from 95oF to 105oF cuts cooling capacity by 7% and increases power consumption by 10%, with a new (compressor) efficiency reduction of SIXTEEN PERCENT.  In just one 10-ton unit operating 2,000 hours per year, this wastes about $250 per year in operating costs.

Pressurized air can easily find its way to leak through the unit cabinet and ductwork.  Leaking air reduces the cooling capacity and wastes energy from the loss of the cooled air.  According to FEMP, energy benefits from cabinet integrity and duct sealing are estimated to be about 20% of the annual cooling consumption, based on a recent study of HVAC systems in Southern California.   Comfort in buildings with tight HVAC systems is expected to improve because the system will be able to deliver sufficient cooled air (as designed) to serve the space loads.   First, an easy task is to to check the cabinets and correct air leakage.  Some corrective actions include replacing screws or latches, patching or replacing gaskets, or replacing missing screws on loose access panels.

Call us for more tips – 888-707-7763 or visit us online at

Extend the life of your air handler unit

As your a/c equipment ages,it can become less efficient, detrimental to your indoor air quality and parts will wear to the point that you may be thinking of replacement.  As a tune-up will restore most of your cars’ performance, precision tune ups and remediation to the air handler components can restore lost performance, efficiency and improve IAQ.

Evaporator / Cooling Coils:
ADAflorida.comThe efficiency of the cooling coils can be directly attributed to the level of cleanliness and can be directly measured by the pressure drop over the coils.  NADCA, The National Air Duct Cleaners Association, recommends  yearly inspections of the air handling unit and “cleaning is highly recommended for heat exchange coils, cooling coils, air flow control devices, filtration devices and air handling equipment determined to have restrictions, blockages, or contamination deposits that may cause system performance inefficiencies, air flow degradation or that may significantly affect the design intent of the HVAC system” (ACR 2006, NADCA)

Condensate Pan / Drain:
ADAflorida.comMicrobial-like growth, dirt and debris can clog condensate pans if not properly maintained, causing overflow within the air handler.  This condition could cause microbial growth to occur within the air handler and ductwork.  The pitch of the drainage pan is also important in assisting the proper flow to the building exterior.

Blower Wheels:
ADAFlorida.comBlower wheels and fins can become heavily soiled and less efficient if not regularly maintained and cleaned.  A dirty condition can also result in poor air flow.  Care must be taken not to unbalance the blades when cleaning but efficiency can be substantially increased.

Insulation Liner:
ADAFlorida.comThe liner on the internal surfaces of the air handler unit provides insulation and sound dampening.  However, in this microbially vulnerable area of the HVAC system, the liner can fail much quicker than the other components.   If degraded and flaking, particles can enter the air stream and cross-contaminate into the occupied spaces.  Closed cell insulation can be installed to extend the equipment life and provide a non-porous insulation liner within the air handler.

Air Duct Aseptics provides fully certified HVAC systems cleaning and remediation services throughout Florida.  Servicing our clients since 1990, you can count on Air Duct Aseptics for professionalism and superior service.  Call toll free 888-707-7763.

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New Florida Mold Licensing

Is a Florida state license required to perform mold assessment and remediation?

The answer is yes! Effective 7/1/11, enforcement of unlicensed contractor activity is in effect per Florida House Bill 713. This means that any contractor holding themselves out to be a professional mold remediator or assessor must be licensed through the Florida Department of Business and Professional Regulation per Chapter 468 of the Florida Statutes.

Air Duct Aseptics is a licensed mold remediator, licensed mold assessor and licensed Class A air conditioning contractor. Call us today to schedule a complimentary HVAC inspection