Air conditioning and
ventilation system
ME321g-Osa
WINDOW-TYPE
AIR-CONDITION SYSTEM
self-contained Vapor Compression Refrigeration
System (VCRS).
HOW IT WORKS
Basic Way
• Warm room air is drawn into the unit by a
fan.
• The air passes over cold evaporator coils,
where heat is absorbed from the air.
• A compressor compresses the refrigerant
gas, raising its temperature and pressure.
• The hot refrigerant goes to the condenser
coils, where heat is expelled to the
outside.
• The now-cooled refrigerant returns to
repeat the cycle.
• Cool air is blown back into the room.
Refrigeration
Cycle Way
• Process 1–2: Compression
(Isentropic Approximation).
• Process 2–3: Condensation
(Constant
• Pressure Heat Rejection)
• Process 3–4: Expansion (Throttling
Process).
• Process 4–1: Evaporation
(Constant
• Pressure Heat Absorption)
MAIN COMPONENTS
MAIN COMPONENTS
EVAPORATOR COIL
CONDENSER COIL
COMPRESSOR
EXPANSION DEVICE
COMPONENTS
BLOWER
CONDENSER FAN
CONDENSER COILS
CONTROLS
AIR INLET GRILL
FILTER
COMPRESSOR
AIR OUTLET GRILL
EVAPORATOR COIL
COST
Typical HP
Approx.
Room Size
(sqm)
Capacity
BTU/hr
Est. Price (₱)
Common
Brands (PH)
Small Room
5,000–8,000
₱6,000 –
₱12,000
Midea,
Fujidenzo
0.5 – 0.75 HP
~8 – 12 sqm
Medium Room
10,000–
12,000
₱12,000 –
₱18,000
Panasonic,
TCL
1.0 – 1.2 HP
~12 – 18
sqm
Inverter Type
9,000–12,000
₱18,000 –
₱25,000+
LG, Kolin
1.0 – 1.2 HP
~12 – 18
sqm
INSTALLATION
STEP BY STEP
1. Measure your window :ensure the AC
fits.
CONSIDERATION
• Structural support (unit weight ≈ 20–
40 kg)
2. Place the unit in the window opening
with a slight tilt toward the outside for
drainage.
• Slight tilt (≈ 2–3° outward) for
condensate drainage
3. Secure brackets and fasteners so the AC
doesn’t fall.
• Proper sealing to reduce infiltration
losses
4. Seal gaps with foam or weatherstripping
to prevent air and water leaks.
• Dedicated electrical circuit (typically
220V in PH)
5. Plug into a nearby outlet : avoid
extension cords if possible.