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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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Ritchie Yellow Jacket 6CFM 93560 Vacuum Pump

$122.50
Aquaguard Float switch Shutoff for Auxilliary drain pan

$7.50
TIF R134a 2-Way Air Conditioning Manifold Gauge

$11.50
GE Zoneline Model 2200 PTAC

$75.00
LENOX TOOLS S3 HAND SEAMER 3"

$27.99
SANBORN PATRIOT IT COOLANT RECOVERY SYSTEM Q148

$2999.99
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool

$69.95
GEMTECH AC GAUGES L@@K!!!! NO RESERVE!!!!!

$35.00
White Rodgers 1E30-914 Heating/Cooling Thermostat

$0.99
3 TRANE HEATING COOLING THERMOSTATS NEW IN BOX

$0.99
Landis & Staefa (Siemens) OpenAir Actuator

$80.00
Lot of Ashcroft 45 1379 SS 02L 30# Pressure Gauge

$15.50
AC Air Brush Flush Cleaning Tool Kit Canister Hose Gun

$20.51
UNIVERSAL FURNACE TRANSFORMER 40 VA - 120 V - 24 VAC

$0.99
Backdraft & Pressure Relief Dampers 10 "X 10" X 2 1/2"

$6.95
ARGO / TACO 1 ZONE HYDROAIR CONTROL! BRAND NEW! ARH-1

$60.00
New Bacharach Stinger 2000 Refrigerant Recovery System

$355.00
Stainless Steel Louver panel 20" x 30" x 1.5" thick

$9.99
HEIL Commercial 3 phase gas pack (10 tons)

$3350.00
BAC F2-442-M, 125 Ton Closed Cooling Tower, 20 HP Fan

$8500.00
DANFOSS RECIPROCATING COMPRESSOR R-75B-1754 R12 115VAC

$19.99
New 50 hp High Pressure Stainless Steel Vapor Blower

$3999.00
HONEYWELL COPPER 2 TUBE THERMOSTAT 14001615-002 sets

$9.99
ETRI 125-XR-22-82 FAN

$7.99
REFRIGERATION & AIR CONDITIONING TRAINING MANUAL

$4.99
Desiccant Dehumidification System SD2 Series Model 5500

$29000.00
Air conditioner service parts GM press cycling sw

$9.99
Air conditioner service parts Valve cores 4 diff sizes

$15.99
CARRIER AIR CONDITIONER CONDENSER COIL Commercial 50DK

$1500.00
GE Zoneline Model 2500 PTAC

$100.00
Float switch Shutoff for Auxilliary drain pan AG-3100

$9.50
Desiccant Dehumidification System SD2 Series Model 3000

$14000.00
10 Mueller Refrig 1/2FLx1/2 MPT Connectors A04780

$5.99
TIF 5050A FREON DETECTOR IN CASE L@@K!! NO RESERVE!!

$50.00
Lot of (2) Unifilter Model 99 Fuel Oil Filter

$15.00
Honeywell Environmental Relay Controller W973J1025

$200.00
Ergomax Natural Gas Heat Exchanger Model E45

$990.00
REZNOR UDAP 200K LOW PROFILE UNIT HEATER

$1095.00
Amprobe THWD-3 Relative Humidity Temperature Meter

$110.99
HVAC Actuator, Electronic Spring Return Valve

$80.00
SPORLAN CATCH ALL REFRIGERATION FILTER/DRYER C-R42E13

$20.00
Heavy Duty Tin Snips

$0.99
TIF 9025 ELECTRONIC REFRIGERANT CHARGING HVAC SCALE

$99.99
THERMAL CHARGE-CHECK Gauge R-12 R-22 R-502

$9.99
Inficon D Tek D-TEK Refrigerant A/C Leak Detector

$99.00
ASCO EF8320G201 VALVE, NIB

$15.00
Lot of Ashcroft 25W 1005H 02L 2000 psi Pressure Gauges

$22.10
York Air Conditioner Heatpump 208/230 3 phase 5-ton

$2150.00
LOT OF 3 ASCO P8262C2 SOLENOIDS, NIB

$15.00
NEW Mountain 1.5 CFM Vacuum Pump

$139.99
Neptune Pump Co. By-Pass Feeder New 2 Gallon DBF-2

$70.00
Suction Accumulator Refrig. reasearch 3810 1-5/8 New

$9.99
Hartzell Inline Axial Duct Fan Blower 20" Dia. 2HP HVAC

$499.87
NEW COPELAND 3DT3-1500-TFD COMPRESSOR 3 PHASE 380/460V

$2799.99
MALCO C6 Offset Crimper & #18 Sheet Metal Divider HVAC

$10.50
Robinair 34800-2K Dual Refrigerant Recovery / Recycling

$3299.00
VAN STEENBURG / COMPLETE RECLAIM FOR REFRIGERANT

$2995.00
Arcoaire Natural Gas Furnace Model # N8MPM125J22B2

$199.99
Commercial Air Conditioner - Carrier 50TM series 20 ton

$8000.00
Lot of Ashcroft 45 1010 A 02L 1000 psi Pressure Gauges

$16.00
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD

$0.99
ASCO 8342G1 VALVE, NEW

$15.00
Air conditioner service parts Ford press cycling sw

$9.99
3 TRANE HEATING COOLING THERMOSTATS NEW IN BOX

$0.99
HVAC/R New 50' Factory Sealed Copper Lineset

$20.00
Morrison Twin Blower Assembly

$50.00
WHITE 01060 Refrigerant Recovery & Recycling Machine

$49.99
New Tradeline Honeywell The Round Thermostat TS86A 1371

$19.99
60 HP HeatCraft Condensing Unit! With Warranty!!

$20000.00
Desiccant Dehumidification System SD2 Series Model 5500

$29000.00
Set of J/ B Refreration Gauges

$4.99
Honeywell Environmental Relay Controller W973J1025

$125.00
Watts Potable Water Expansion Tank

$9.99
HVAC Air Conditioning Heating Ventilation 19Manuals CD

$0.01
Johnson Controls AS UNT110-1 Unitary Controller

$139.99
Greenheck bacward inclined centrifugal fan

$1500.00
New Modine Natural Gas Unit Heater

$100.00
Air conditioner service parts Jeep Dodge press cut off

$9.99
Lot of Ashcroft 20W 1001TH 01B XUC 100 psi Gauges

$12.50
Commercial Air Conditioner Carrier 50TM series 12.5 ton

$5000.00
Honeywell 621-0010-AR

$50.00
Desiccant Dehumidification System SD2 Series Model 5500

$29000.00
HVAC

$0.99
Bacharach Stinger Manifold Gauges Refrigerant 410a NEW

$52.00
Amprobe ACD-14FX Digital Clamp-On Multimeter

$74.99
HAIER 5 TON 12 SEER SPLIT SYSTEM AIR CONDITIONER 54613

$600.00
Gordon Piatt 300 HP Gas/Oil Burner for Boiler

$3500.00
Hartzell Inline Axial Duct Fan Blower Dia. 24" 5HP HVAC

$1499.87
2-Stage Rotary Heavy Duty Vacuum Pump 10CFM Industrial

$299.95
Burnham Gas Boiler

$500.00
2-Stage Rotary Deep Vacuum Pump 29.92"Hg 1/4HP AC/HVAC

$119.95
TIF 9010A ELECTRONIC REFRIGERANT SCALE + FAST SHIPPING

$35.50
DUAL SHAFT LELAND Electric MOTOR 1/6 hp 15 V +Capacitor

$9.99
NIB YOUNG HEAT EXCHANGER MODEL# SSF-502-ER-1P

$209.50
JOHNSON CONTROLS RUBBER DIAPHRAGM # 13444

$19.99
AIR CONDITIONING GE BLOWER FAN MOTOR 1/3 HP HVAC

$26.00
SLING PSYCHROMETER HEAD (FIELDPIECE ARH4)

$39.99