Lavanya Aircon

01/03/2017

HEPA Filters :

HEPA filters are used in industries such as aerospace, pharmaceutical processing, hospitals and nuclear power.

In a baseline HEPA filter, for every 10,000 particles that enter the filter within its filtering range, only 3 particles get through. HEPA filters actually become more efficient the longer they are in use.

16/03/2016

Aluminium Linear Round Grills

03/03/2016

Kitchen Hoods Cleaning Services

03/03/2016

03/03/2016

Why is air duct cleaning so important?

Air ducts naturally accumulate sizeable deposits of dust and other contaminants over a period of years.

Dirt deposits can reduce the efficiency of your heating and air conditioning system and even cause physical discomfort and illness by degrading the quality of air you breathe indoors.

Dirt deposits in your air ducts actually act as food for organisms such as dust mites.

03/03/2016

Air duct cleaning benefits :

1. Safeguard your health by eliminating potential causes of allergies and respiratory problems.

2. Eliminate the dirt that acts as food for dust mites, bacteria, mold and other micro organisms.

29/02/2016

Commonly used HVAC abbreviations :

• AC - Alternating current
• A/C - air conditioning
• AFF - above finished floor
• AFG - above finished grade
• AL - aluminum
• AMP - ampere
• ARR - arrangement
• ATC - automatic temperature control, at ceiling
• ATM - atmosphere
• AUTO - automatic
• AUX - auxiliary
• AVG - average
• BBD - boiler blowdown
• BF - boiler feed
• BHP - boiler horsepower, brake horsepower
• BOD - bottom of duct
• BOP - bottom of pipe
• BOT - bottom
• BP - back pressure
• B & S - bell-and-spigot
• BV - butterfly valve
• oC - degrees Celsius
• C to C - center to center
• CA - compressed air
• CAL - calorie
• CAP - capacity
• CFH - cubic feet per hour
• CFM - cubic feet per minute
• CI - cast iron
• CIRC - circular
• CL - center line
• CM - centimeter
• CM2 - square centimeter
• CO - clean out
• COL - column
• CONC - concrete, concentric
• CONN - connect, connection
• CONT - continuation
• CPVC - chlorinated polyvinyl chloride
• CR - condenser return
• CRW - chemical resistant waste
• CS - condenser supply
• CTR - center
• CU - cubic
• CU FT. - cubic feet
• CU IN. - cubic inches
• CV - check valve
• CW - cold water
• CWR - cold water riser
• DDC - direct digital control
• DEG - degree
• DELTAT - temperature difference
• DET - detail
• DIA - diameter
• DISC - disconnect
• DR - drain
• DWG - drawing
• EA - exhaust air, each
• EAT - entering temperature
• EATR – Exhaust Air Transfer Ratio - to identify the amount of exhaust air transferred to inlet air in an energy recovery ventilator
• EFF - efficiency
• EJ - expansion joint
• EL - elevation
• ELB - elbow
• ELEC - electrical
• ENT - entering
• ERV – Energy Recovery Ventilator
• ESP - external static pressure
• ET - expansion tank
• EVAP - evaporator
• EWT - entering water temperature
• EXH - exhaust
• EXP - expansion
• EXST - existing
• EXT - external
• oF - degrees Fahrenheit
• F - Fahrenheit
• FC - flexible connector, flexible connection
• FCO - floor clean out
• FD - floor drain
• FDW - feed water
• FEC - fire extinguisher cabinet
• FF - finish floor
• FG - finish grade
• FHC - fire hose cabinet
• FLA - full load amps
• FLR - floor
• FM - flow meter
• FO - fuel oil
• FOV - flush out valve
• FPM - feet per minute
• FPS - feet per second
• FS - flow switch, federal specs
• FT - foot, feet
• FTG - fitting
• FV - flush valve
• G - gram, gas line
• GA - gauge
• GAL - gallons
• GALV - galvanized
• GL.V - globe valve
• GND - ground
• GPD - gallons per day
• GPH - gallons per hour
• GPM - gallons per minute
• GPS - gallons per second
• GR - grain
• GV - gate valve
• GWH - gas water heater
• H2O - water
• HB - hose bibb
• HD - head
• Hg - mercury
• HGT - height
• HMD - humidity
• HORIZ - horizontal
• HP - horsepower
• HR - hour
• HRV – Heat Recovery Ventilator
• HTD - heated
• HTR - heater
• HW - hot water
• HWH - hot water heater
• HWR - hot water return, hot water riser
• HWS - hot water supply
• HWT - hot water tank
• HZ - herts
• ID - inside diameter
• IN. - inch
• INHg - inches of mercury
• INSUL - insulation
• INT - international
• INTL - internal
• IPS - iron pipe size
• IV - indirect vent
• IW - indirect waste
• J - joule
• K - kelvin
• KG - kilogram
• KM - kilometer
• KM2 - square kilometer
• KPA - kilo pascal
• KS - kitchen sink
• KW - kilowatt
• L - length, liter
• LAT - leaving air temperature
• LB. - pound
• LBF - pound-force
• LIQ - liquid
• LP - low pressure
• LRA - locked rotor amps
• LVL - level
• LVR - louver
• LWT - leaving water temperature
• M - meter
• M2 - square meter
• M TYPE - lightest type of rigid copper pipe
• MAN - manual
• MAT - mixed air temperature
• MAX - maximum
• MBH - thousand British thermal units per hour
• MFR - manufacturer
• MG - milligram
• MGD - millions gallons per day
• MIN - minimum or minute
• ML - milliliter
• MM - millimeter
• MM3 - cubic millimeter
• MPT - male pipe thread
• MTD - mounted
• MU - make up
• NA - not applicable
• NC - normally closed
• NEG - negative
• NIC - not in contact
• NO - normally open
• NPHP - name plate horsepower
• NPS - nominal pipe size
• NTS - not to scale
• O - oxygen
• OA - outside air
• OAT - outside temperature
• OC - on center
• OD - outside diameter
• OED - open end duct
• OF - overflow
• OV - outlet velocity
• OZ. - ounce
• PA - pascal
• PC - plumbing contractor
• PCR - pumped condensate return
• PD - pressure drop
• PF - power factor
• PG - pressure gauge
• PL - plate
• PNEU - pneumatic
• PRESS - pressure
• PROP - propeller
• PRV - pressure reducing valve
• PSI - pounds per square inch
• PSIA - pound per square inch absolute
• PSIG - pound per square inch gauge
• PV - plug valve
• QTY - quantity
• RA - return air
• RAD - radius
• RAT - return air temperature
• RD - roof drain
• R/E - return and exhaust
• RECOV - recovery
• RED - reducer
• REF - reference
• RH - relative humidity
• REQD - required
• REV - revision
• RL - refrigerant liquid
• RLA - Rated Load Amperes
• RM - room
• RS - refrigerant suction
• RTN - return
• RV - relief valve
• S - switch
• SA - shock absorber, supply air
• SAT - supply air temperature
• SCH - schedule
• SDT - saturated discharge temperature
• SEC - seconds, secondary
• SENS - sensible
• SEP - separate
• SEQ - sequence
• SER - series
• SERV - service
• SF - service factor
• S*T - sheet
• SI - international systems of units
• SOL - solenoid
• SP - static pressure
• SPEC - specification
• SQ. - square
• SQ.FT. - square feet
• SS - stainless steel
• SSH - static suction head
• SST - saturated suction temperature
• STD - standard
• STH - static total head
• STL - steel
• SUCT - suction
• SPLY - supply
• SV - service
• SVH - static velocity head
• SW - service weight
• SWS - service water
• TD - temperature difference
• TDH - total dynamic head
• TEMP - temperature
• TH - thermometer
• THK - thick
• TP - total pressure
• TSP - total static pressure
• UF - under floor
• UH - unit heater
• V - vent, volt, volume
• VAC - vacuum
• VAV - variable air volume
• VB - vacuum breaker
• VCI - vacuum cleaning inlet
• VCL - vacuum cleaning line
• VEL - velocity
• VERT - vertical
• VIB - vibration
• VOL - volume
• VSD - variable speed drive
• VP - velocity pressure
• VTR - vent thru roof
• W - watt, width, wide
• WB - wet bulb
• WCO - wall clean out
• WG - water gauge
• WH - water heater

14/11/2015

Breath Fresh, Live Fresh

14/11/2015

COMMON AIR CONDITIONER PROBLEMS

REFRIGERANT LEAKS
If your air conditioner is low on refrigerant, either it was undercharged at installation or it leaks. If it leaks, simply adding refrigerant is not a solution. A trained technician should fix any leak, test the repair, and then charge the system with the correct amount of refrigerant. Remember that the performance and efficiency of your air conditioner is greatest when the refrigerant charge exactly matches the manufacturer's specification, and is neither undercharged nor overcharged. Refrigerant leaks can also be harmful to the environment.

INADEQUATE MAINTENANCE
If you allow filters and air conditioning coils to become dirty, the air conditioner will not work properly, and the compressor or fans are likely to fail prematurely.

ELECTRIC CONTROL FAILURE
The compressor and fan controls can wear out, especially when the air conditioner turns on and off frequently, as is common when a system is oversized. Because corrosion of wire and terminals is also a problem in many systems, electrical connections and contacts should be checked during a professional service call.

SENSOR PROBLEMS
Room air conditioners feature a thermostat sensor, located behind the control panel, which measures the temperature of air coming into the evaporative coil. If the sensor is knocked out of position, the air conditioner could cycle constantly or behave erratically. The sensor should be near the coil but not touching it; adjust its position by carefully bending the wire that holds it in place.

DRAINAGE PROBLEMS
When it's humid outside, check the condensate drain to make sure it isn't clogged and is draining properly. Room air conditioners may not drain properly if not mounted level.

02/10/2015

What is industrial ventilation?

Ventilation is the mechanical system in a building that brings in "fresh" outdoor air and removes the "contaminated" indoor air.
In a workplace, ventilation is used to control exposure to airborne contaminants. It is commonly used to remove contaminants such as fumes, dusts, and vapours, in order to provide a healthy and safe working environment. Ventilation can be accomplished by natural means (e.g., opening a window) or mechanical means (e.g., fans or blowers).
Industrial systems are designed to move a specific amount of air at a specific speed (velocity), which results in the removal (or "exhaust") of undesirable contaminants. While all ventilation systems follow the same basic principles, each system is designed specifically to match to the type of work and the rate of contaminant release at that workplace.

02/10/2015

What is the purpose of a ventilation system?

There are four purposes of ventilation:
1. Provide a continuous supply of fresh outside air.
2. Maintain temperature and humidity at comfortable levels.
3. Reduce potential fire or explosion hazards.
4. Remove or dilute airborne contaminants.

02/10/2015

Why have an industrial ventilation system?

Ventilation is considered an "engineering control" to remove or control contaminants released in indoor work environments. It is one of the preferred ways to control employee exposure to air contaminants.
Other ways to control contaminants include:
• eliminate the use of the hazardous chemical or material,
• substitute with less toxic chemicals,
• process change, or
• work practice change.