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InspectAPedia ® Home AIR CONDITIONING & HEAT PUMP SYSTEMS AGE of AIR CONDITIONERS & HEAT PUMPS AIR CONDITIONER TYPES, ENERGY SOURCES AIR FILTER EFFICIENCY AIR FILTERS, FIBERGLASS PARTICLES AIR FLOW MEASUREMENT CFM BLOWER FAN OPERATION & TESTING BOOKSTORE - Air Conditioning "How To" Books CAPACITORS for HARD STARTING MOTORS CAPILLARY TUBES CIRCUIT BREAKER SIZE for A/C or HEAT PUMP CLEANING & Legionella BACTERIA CONDENSING COIL COOLING LOAD REDUCTION by ROOF VENTS CRITICAL DEFECTS on A/C SYSTEMS DEFINITION of Heating & Cooling Terms DEW POINT TABLE - CONDENSATION POINT GUIDE DIAGNOSE & FIX AIR CONDITIONER / HEAT PUMP DUCTS - Asbestos DUCT INSULATION, Asbestos Paper DUCT INSULATION for SOUNDPROOFING DUCT SYSTEM NOISES DUST, HVAC CONTAMINATION STUDY ELECTRIC MOTOR OVERLOAD RESET SWITCH EVAPORATOR COIL or COOLING COIL EVAPORATIVE COOLING SYSTEMS FAN NOISES GAUGE, REFRIGERATION PRESSURE TEST HEAT LOSS (or GAIN) in buildings INSPECTION CHECKLIST - OUTDOOR UNIT INSPECTION LIMITATIONS, A/C SYSTEMS LOST COOLING CAPACITY LOW VOLTAGE TRANSFORMER TEST MOTOR OVERLOAD RESET SWITCH MOLD in AIR HANDLERS & DUCT WORK OPERATING COST, AIR CONDITIONER OPERATING DEFECTS, AIR CONDITIONING REPAIR & DIAGNOSTIC FAQs for A/C RETROFIT SIZING for A/C or HEAT PUMPS SYSTEM OPERATION WATER COOLED AIR CONDITIONERS More Information |
Gasketed air conditioner or heating filters, leaky air filters, washable air conditioning or heater air filters: This article explains and explain leaky air filters and the value of gasketed air filters, followed by comments on the effectiveness of washable air filters. This website answers almost any question you might ask about air filters for heating or air conditioning systems. We explain how an air conditioning service technician will diagnose certain common air conditioning system failures or defects. In these articles we are referring to filters installed on central air conditioning or central heating systems that move air through air handlers and duct systems. Standalone or portable "air cleaners" or "air purifiers" are generally ineffective in buildings. We include photographs to assist readers in recognizing cooling system defects. Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman. The Benefits of Gasketed Air Filters on HVAC Systems
Implications of dust and debris in the return air plenumHow Good are Washable air filters for heating and air conditioning systemsWashable re-usable air filters are very appealing from a cost viewpoint. I would look for data to indicate whether or not the washable filter runs at a lower MERV or filtering efficiency.
In our cascaded filter proposal (discussed at this website) we included and continued to use a washable filter that came with the equipment since it was not reducing the airflow CFM, but we preceded it with other filters for different purposes.
At left we illustrate a plastic and nylon washable air filter used in both window air conditioners and in wall-mounted split system air conditioner units. Unlike the foam type air filter shown above, these plastic and nylon air filters withstand repeated cleaning without disintegrating. The efficiency of these filters increases as debris begins to settle on the filter surface, but eventually the improvement in air filtration efficiency is offset by reduced airflow - so clean the air filters in accordance with the cooling unit manufacturer's instructions - typically monthly during constant use. A metallic air filter (shown ) is not very efficient (effective) at trapping airborne particles when it is clean, though efficiency improves as it gets dirty. Other pleated, fabric or paper air filters that are also washable are more efficient at trapping airborne debris. Be sure to read PARTICLE SIZES & IAQ for a description of the sizes and behaviors of some of the common particles that are an indoor air quality concern. Frequently Asked Questions (FAQs)... Ask a Question or Search InspectApediaQuestions & answers or comments about using gasketed & washable air filters and their effects of dirt & debris in HVAC duct systems.. Ask a Question or Enter Search Terms in the InspectApedia search box just below. Technical Reviewers & ReferencesRelated Topics, found near the top of this page suggest articles closely related to this one. Click to Show or Hide Citations & References
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