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AIR CONDITIONING & HEAT PUMP SYSTEMS
A/C - HEAT PUMP CONTROLS & SWITCHES
AIR CONDITIONER COMPONENT PARTS
AIR CONDITIONER TYPES, ENERGY SOURCES
AIR FILTER EFFICIENCY
AIR FILTERS, FIBERGLASS PARTICLES
AIR FLOW MEASUREMENT CFM
APPLIANCE EFFICIENCY RATINGS
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BOOKSTORE - Air Conditioning "How To" Books
CAPACITORS for HARD STARTING MOTORS
CLEANING & Legionella BACTERIA
CHINESE DRYWALL HAZARDS
CONDENSATION or SWEATING PIPES, TANKS
DEFINITION of Heating & Cooling Terms
DEW POINT CALCULATION for WALLS
DEW POINT TABLE - CONDENSATION POINT GUIDE
DIAGNOSE & FIX AIR CONDITIONER / HEAT PUMP
DIAGNOSE & FIX HEATING PROBLEMS-BOILER
DIAGNOSE & FIX HEATING PROBLEMS-FURNACE
DUCTS - Asbestos
DUCT INSULATION, Asbestos Paper
DUCT INSULATION for SOUNDPROOFING
DUCT SYSTEM NOISES
DUCTS, Asbestos Transite Pipe
DUST, HVAC CONTAMINATION STUDY
ELECTRIC MOTOR OVERLOAD RESET SWITCH
EVAPORATIVE COOLING SYSTEMS
FAN LIMIT SWITCH
GAS EXPOSURE EFFECTS, TOXIC
GAS DETECTION INSTRUMENTS
HEAT LOSS (or GAIN) in buildings
HEAT LOSS (or GAIN) INDICATORS
HEAT LOSS R U & K VALUE CALCULATION
HEATING SMALL LOADS
INSPECTION CHECKLIST - OUTDOOR UNIT
INSPECTION LIMITATIONS, A/C SYSTEMS
LEED GREEN BUILDING CERTIFICATION
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 GUIDE, AIR CONDITIONERS / HEAT PUMPS
REPAIR & DIAGNOSTIC FAQs for A/C
THERMOSTATS, HEATING / COOLING
THERMOSTATIC EXPANSION VALVES
WATER COOLED AIR CONDITIONERS
WINDOW / WALL AIR CONDITIONERS
WINDOW / WALL A/C SUPPORTS
Safety support requirements for air conditioners: this article explains and illustrates the need for safe, secure supports beneath window, through wall, and wall-mounted air conditioners and heat pumps. Not only can an unsupported air conditioner fall from the building, risking injuring or killing someone below, but there is also a risk of simply dropping the entire unit out the window or down the wall during installation or removal - an annual project for some window and through-wall units.
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Safety Warnings About the Need for Proper Support for Wall-Mounted Exterior Air Conditioner / Heat Pump Compressor/Condenser Units or Window Air Conditioner Units
The window air conditioner unit shown at below left actually fell out of this window during installation (I was there - Ed.). It bounced down the lower roof, rolled over a few times, and fell another eight feet to the ground. Luckily no one was below at the time. Remarkably the unit survived and still worked after it was reinstalled in the window opening - you can see the smashed condensing coil fins on the rear of the unit - damage that occurred during the unit's fall to the ground below.
At below left the accordion-type expanding window-mounted air conditioner opening bracket upper edge, braced against the lower edge of the window sash, is the principal connection that keeps this unit from falling out of the window opening. Simply raising the window sash can result in the whole assembly falling off of the building.
Short screws, often sheet metal screws secure the expanding bracket and window-filler on the sides of the air conditioner to the window sash bottom edge near the left and right ends of the upper sliding metal bracket. And two additional screws secure the accordion expanding fillers to the trim on either side of the window frame. These little screws are not structural and do not provide much additional security against losing the whole air conditioner out the window. The outside view of this type of window air conditionr makes clear that it has no other support.
Examples of Supported Window or Wall-Mounted Air Conditioner or Split System Compressors
Our photos below illustrates different types of exterior, wall-mounted split system air conditioner compressor/condenser units high on an apartment building in Buenos Aires. Our second photo of outdoor wall-mounted A/C compressor/condenser units (below right) illustrates the use of supporting brackets. A similar bracket is required beneath most window air conditioner units.
Examples of Support Brackets for Window Air Conditioners & Through-Wall Air Conditioners
The through-wall air conditioner at below left is supported by an owner-built plywood shelf and diagonal wood bracket - better than nothing, but a design exposed to risk of eventual collapse from rot and water damage. Steel brackets sold for supporting window or through-wall 9or wall-mounted equipment are in our OPINION a safer alternative. At below right, the Friedrich air conditioner is indeed supported by metal brackets (red arrows).
Frequently Asked Questions (FAQs) risk of falling air conditioners & heat pumps or split system compressor/condenser inverter units.
Questions & answers or comments about falling air conditioners & heat pumps or split system compressor/condenser inverter units.
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Technical Reviewers & References
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