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Industrial Equipment, MRO

HVAC

HVAC Article

HVAC (pronounced either "H-V-A-C" or, occasionally, "aitch-vak") is an initialism/acronym that stands for "heating, ventilation, and air conditioning". HVAC is sometimes referred to as "climate control" and is particularly important in the design of medium to large industrial and office buildings such as sky scrapers and in marine environments such as aquariums, where humidity and temperature must all be closely regulated whilst maintaining safe and healthy conditions within. In certain regions (e.g., UK) the term "Building Services" is also used, but may also include plumbing and electrical systems. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilation is dropped as HACR (such as the designation of HACR-rated circuit breakers).

Heating, ventilation, and air conditioning is based on the basic principles of thermodynamics, fluid mechanics, and heat transfer, and to inventions and discoveries made by Michael Faraday, Willis Carrier, Reuben Trane, James Joule, William Rankine, Sadi Carnot, and many others. The invention of the components of HVAC systems goes hand-in-hand with the industrial revolution, and new methods of modernization, higher efficiency, and system control are constantly introduced by companies and inventors all over the world.

The three functions of heating, ventilation, and air-conditioning are closely interrelated. All seek to provide thermal comfort, acceptable indoor air quality, and reasonable installation, operation, and maintenance costs. HVAC systems can provide ventilation, reduce air infiltration, and maintain pressure relationships between spaces. How air is delivered to, and removed from spaces is known as room air distribution.

HVAC Items

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Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
NIB~ERIE ZONE VALVE VT2317G13A030
$19.00
axial vane fan condens blower motor 200V 20A 3Ph 6.7Hp
$34.99
NEW Regin HMH Duct / Wall Humidistat IP54
$9.99
Vacuum Pump 3 CFM CPS Products Brand New in Box # VP3D
$220.00
Lennox LGA042H2BS2G Rooftop AC Heater Packaged Unit
$696.96
2pcs. HONEYWELL V 4046C 1047 PILOT GAS VALVE ,NIB
$20.00
Honeywell R7847 B 1031 Flame Amplifier R7847B1031-NIB
$1.82
Dayton 36" Exhaust Fan
$100.00
RANCO ELECT. TEMP. CONTROL MODEL ETC-111000
$50.99
Carrier Evaporating Sequencing Control Pannel W441E 100
$9.99
SPENCE D PILOT REPAIR KIT STEAM PRESSURE REDUCING
$19.99
Fasco furnace blower P/N 70-22436-02 G.C. L@@K!!!!
$29.99
Tradeline Honywell Automatic Vent Damper D896A 8" Dia.
$29.99
dayton hazardous location 1/2hp electric motor
$75.00
Trane Self Contained 20 ton HVAC Unit
$9000.00
Weil-McLain Gas Boiler LGB-14 (2003)
$4000.00
AO Smith Deluxe Commercial Condenser Fan Motor
$35.00
Carrier 50HJ-00811-631UJ07 Rooftop AC Unit
$696.96
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD
$0.99
Amtrol float type air vent model 700 - 30
$2.99
42" Axial Wall Prop Exhaust Package Fan 17300 cfm 1.5HP
$1299.00
Jakel Furnace blower P/N 1013617 G.C. L@@K!!!!
$29.99
Johnson Controls Open High Pressure Control P72CA-2C
$24.99
Zeks Nomonox Air Purifier for Breathing
$749.49
A.O. Smith Direct Drive Blower DL1036 NIB!
$9.99
HONEYWELL R4795 FLAME SAFEGUARD PRIMARY CONTROL ,NEW
$61.01
LENNOX 13H36 Condenser Fan Motor 1/4HP 208-230V 1PH NIB
$69.99
Refrigerant Recovery Tool
$13.50
2-Stage Rotary Deep Vacuum Pump Heavy Duty 3CFM AC/HVAC
$169.95
TRANE 10 TON HEAT PUMP MODEL #TWA120A400FB 460V 3 PH
$3500.00
NEW BROAN 110 CFM BATH FAN 110CFM BATHROOM FANS 676
$54.99
KETT SHEAR 14 GAUGE METAL AIR TOOL P-540 P540
$51.00
FACTORY SEALED BRAND NEW R-22
$109.01
Manifold Gauge 5'High Pressure Hose R407 R134A R404 R22
$69.95
fan exhaust belt-drive Dayton 3CC75 36"dia 665rpm max
$100.00
Reznor UDAP 45 V3 NIB 45000 BTU Garage Heater
$549.00
Copper Tube 1/8" .030" Air Conditioning Refrigeration
$24.99
BELIMO AF120-S US DAMPER ACTUATOR AF120SUS NEW
$49.99
Johnson Control Differential pressure Switch P74 FA NIB
$17.77
Robinair Refrigerant Recovery Unit
$150.00
RefrigerationTemp. Control "Johnson Control"
$30.99
MIXED LOT OF 5 CAPACITOR'S SEE DESCRIPTION
$9.99
Lamson blower and motor 40 hp
$900.00
Burnham Energy Boiler Control 5000
$200.00
LENNOX 51H75 Condenser Fan Motor 1/4HP 460V 1PH NIB
$99.99
Unbelievable,Must Sell, 300 HP- H.PRESSURE STEAM BOILER
$1000.00
ALCO REFRIGERATION LIQUID MOISTURE INDICATOR HMI-1TT7
$0.99
Core Removal Tool HVAC
$23.50
Mini Copper Tubing Cutter HVAC Tool 1/8 to 7/8" OD Tube
$0.01
MORRILL 115 W MOTOR WITH MOUNT KIT AND FAN/NEW/
$14.99
Halogen Gas HFC CFC Refrigerant Leak Detector Checker
$33.99
HONEYWELL M8185D1006 MODUTROL IV MOTOR
$99.99
Asco Red Hat 8215B50 1" Shut-off Valve "NIB"
$49.95
Lot of 50 Honeywell Q313A1055 Thermopiles New
$26.59
LEAK DETECTION DYE 8 0Z 100%
$20.00
WHITE-RODGERS FAN AND ELECTRIC HEAT SEQUENCER
$10.00
2pcs. SULLAIR 02250125-657 VALVES , NEW
$20.00
Inficon Tek-Mate Refrigerant Leak Detector
$49.99
GE MOTORS AC MOTOR 5K42HN4106 1/2HP Stock #K116
$0.99
TIF Gas Leak Detector for Combustible Gases TIF 8800
$14.99
Reznor XL400-3 Gas Heater
$100.00
Fasco A129 Blower Motor X89-563 New Replacement Blower
$30.00
Reznor UDAP100 V3 Power Vented Heater NIB 100,000 BTU
$689.00
TIF ELETRONIC CHARGING METER MODEL # TIF9025
$49.99
Yellow Jacket Multi Swage Punch Tool
$4.25
HONEYWELL PNEUMATIC THERMOSTAT TP970A 2259 4 NEW
$24.99
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe
$2.95
30" Axial Wall Prop Exhaust Package Fan 9700 cfm .75HP
$849.00
Reznor UDAP250 V3 Power Vented Heater NIB 250,000 BTU
$1195.00
WHITE-RODGER UNIVERSAL REPLACEMENT GAS CONTROL
$10.00
(NEW) White-Rodgers 1F97-1271 Thermostat 90-series-blue
$70.00
Liebert Challenger 3000 5 Ton Downflow HVAC
$6500.00
2 PIECES SULLAIR CP 1/4" 041517 REGULATOR VALVES , NIB
$20.00
CENTURION/YORK 2 TON HEAT PUMP PACKAGE UNIT
$2100.00
Mini Tube Tubing Cutter Plumbing HVAC Tool 1/8-5/8" OD
$4.95
RANCO ELECT. TEMP. CONTROL MODEL ETC-111000
$65.99
DURADRIVE FLOATING ACTUATOR HVAC 3 WAY VALVE SPRING RE
$100.00
Ranco Condenser Fan Cycling Control 010-2054 NIB HVAC
$24.99
NEW CAREL CARD SRL 120151 PCOBAF0A21 REV 3 AIRFLOW
$8.99
J/B 1/2 ODS EXTENSIONS REFRIGERANT BALL VALVE 57R7
$9.99
Wheel Puller 1032 A, 6" Diameter R-378-8
$9.99
MCDONNELL & MILLER RB-24 24V LOW WATER CUTOFF 144685
$69.95
Paxton Centrifugal Blower 500CFM with 7.5 HP Motor
$491.77
LENNOX 79J81 Condenser Fan Motor 1/3HP 208-230V 1PH NIB
$69.99
LENNOX 79J82 Condenser Fan Motor 460/380-420 1PH NIB
$99.99
Honeywell T775A 1027 Electronic Remote Temp Control,NOS
$50.00
New Dunham Bush Compressor 402CFNRMFBJ6C
$595.00
Int'l Refrigeration Products Cast Iron Electric Motor
$5.50
Atkomatic BN4101 Solenoid Valve 2 Way "NIB"
$9.95
Dialogic Voice Control System VR/160~
$9.99
Bosch 9810232136 1/4" 4 Way 3 Position Solenoid Valve
$39.95
YORK 2.5 TON HEAT PUMP PACKAGE UNIT 13 SEER R-22
$2735.00
EBCO EPRE-2 Refrigerant Recovery Equipment System
$200.00
Supco CR87B Temperature Recorder
$50.00
Parker Sub Base Model No.K022090 New
$19.99
1" PILLOW BLOCK BEARINGS FOR A BELT DRIVE BLOWER.
$5.00
ROSS 2773A4082 SOLENOID LOCKOUT VALVE 1/2"
$9.99
48" Axial Wall Prop Exhaust Package Fan 23,820 cfm 2 HP
$1499.00