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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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Ranco household refrigerator control mod. K-252

$4.99
Line Voltage Head Pressure Control

$39.99
2 TRANE HEATERS

$100.00
Johnson Control P10FC-4C Low Pressure Control

$30.00
Omega II Infrared Radiant Tube heater (20' or 30' long)

$799.00
NEW AIRMASTER 28" FAN 3 HP MOTOR

$28.99
12 New RECHI Air Conditioner Compressors 5238 BTU

$199.99
Ranco ice bank control 018-100

$9.99
New Halogen Refrigerant Freon Leak Detector HVAC/R Tool

$69.95
INFICON D-TEK SELECT REFRIGERANT LEAK DETECTOR

$111.49
Large 2 oz Compressor Oil/Dye Screw-in Injector AC/HVAC

$57.75
Trane Tracer MP 501 Controller

$85.00
Fast Vac HIGH VACUUM PUMP MODEL DV-25B

$149.99
Fan Blower Pamotor 7650S 240v mini fan computer

$5.00
Invensys MP-5210-0-0-3 Hydraulic Valve Actuator (120 V)

$100.00
New Dayton Commercial Fan Direct Drive Air Circulator

$225.00
Steam Heat Boiler 1984 WEIL-McLAIN P-MGB-6...WORKS!!!

$999.00
YELLOW JACKET R-30a REFRIGERANT RECOVERY SYSTEM

$112.50
Ranco household refrigerator control mod. K-407

$4.99
Infra Red Heater L@@K L@@K L@@K L@@K L@@K

$19.99
NEW Refrigeration Air Conditioner Compressor 5238 BTU

$19.99
Ranco Adaptable refrigerator control mod.A59-560

$9.99
RANCO COMMERCIAL TEMPERATURE CONTROL NEW/BOX 010-1410

$10.51
BFK-163 Bi-Directional heat pump filter-drier, 3/8 SAE

$4.99
IMPERIAL USA REFRIGERATION GAUGES MANIFOLD

$38.00
BFK-164 Bi-Directional heat pump filter-drier, 1/2" SAE

$9.99
Bx of 4 Ranco household refrigerator control mod. K-405

$18.00
THERMA FLO REFRIGERANT RECOVERY UNIT

$60.99
INFICON VORTEX 708-202-G1 REFRIGERANT RECOVERY UNI

$62.55
2-Stage Rotary Deep Vacuum Pump 29.92"Hg 1/4HP AC/HVAC

$119.95
BFK-084 Bi-Directional heat pump filter-drier, 1/2" SAE

$4.99
Johnson Controls N30

$300.00
Air conditioner service parts Master tech package

$120.00
Hydraulic Tube Pipe Expander kit Brand New w/warranty

$242.50
PENN SINGLE FUNCTION HIGH PRESSURE CONTROL

$10.50
Ranco household refrigerator control mod. K-250

$4.99
Honeywell Replacement Pilot Modules S8610U 3009 NEW

$29.99
Mastercool 6 CFM Single Stage High Perf Deep Vac Pump

$182.99
TEST & CHARGING HVAC GAUGES YELLOW JACKET

$9.99
Ranco Low ambient cut-out thermostat mod.A30-204

$4.99
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC

$39.95
Manifold Gauge 5'High Pressure Hose HVAC R134/R22/R404

$75.75
Digital Refrigeration System Analyzer (DRSA-1100)

$399.00
2 PIPE EXPANDERS SET 1-1/2 TO 2-1/2 & 2-1/8 TO 3-1/2

$24.99
Dual 1/4" & 5/16"Valve Core Remover/Installer AC/HVAC

$10.49
Dayton Industrial Exhaust Fan 54" 1AHA6 Warehouse Vent

$599.99
R-410 EXPANSION VALVE REPLACEMENT EA36YD122

$34.50
Emerson Thermal Expansion Valve PCN: 065623, AA 1/4 MC

$9.99
Ranco household refrigerator control mod. K-405

$4.99
fan coil units

$350.00
Johnson Control P20BB-1 Limit Control

$15.00
DUCT CLEANING EQUIPMENT PACKAGE

$2400.00
NEW FIELDPIECE DIGITAL MULTIMETER W 400AAC CLAMP LT17A

$89.99
Frick Co. Blue Cold Refrigeration Compressor V16501 R11

$25.00
HVAC THERMOSTAT PRO 8000

$57.55
Greenheck Exhaust Fan Roof or Sidewall Mount

$202.51
NEW Mountain 1.5 CFM Vacuum Pump

$139.99
Ranco commercial temperature control 010-1419,-35F-15F

$9.99
Honeywell Super Tradeline R4243 B 1038 Contactor

$10.00
MASTER COOL MMB10 EVAPORATIVE COOLER 2000 CFM BRAND NEW

$319.00
Type K Thermocouple Temperature Sensor HVAC Fit Amprobe

$2.95
R22 freon sealed 30 lbs

$100.00
AIR CONDITIONING & HEATING SYSTEM

$2200.00
Ranco 019-1559 Two Temperature control, 10F to 60F

$9.99
LENOX TOOLS S3 HAND SEAMER 3"

$27.99
2 FOSTORIA ELECTRIC HEATERS

$50.00
Air Conditioner FLOW-PLUS Drain Polymer Pan Treatment

$17.00
Air conditioner service Skye mod SA7000 dye injector

$39.99
Car AC Quick Adapter Connector Coupler Set w/Valve HVAC

$37.95
Stinger 2000 Recovery System

$439.00
3 BFK-163 Bi-Direct'nl heat pump filter-driers, 3/8 SAE

$15.00
Ranco household refrigerator control mod. K-603

$4.99
Ranco household refrigerator control mod. K-406

$4.99
JOHNSON CONTROLS V-4334-1002 3 WAY MIXING VALVE

$30.00
SUPCO VG60 VACUUM GAUGE 1/4" MALE GAUGE SET

$40.04
NEW HONEYWELL FOCUSPRO 5000 DIGITAL LG THERMOSTAT

$39.99
Siemens 42DF35AG 3 Pole 240V FL 50A DEFINITE PURPOSE

$19.99
UNIWELD MANIFOLD W/ HOSES QS4L5H

$45.00
ROBINAIR 14830A THERMISTOR VACUUM GAUGE

$87.47
Trane Air handler Unit - large unit 2 available

$899.00
THERMOSTAT PROGRAMMABLE HVAC AIR CONDITIONING

$8.00
Danfoss Low Pressure Control KP 1 New In Box

$9.99
Ranco household refrigerator control mod. K-401

$4.99
Ranco C12-9024 A/C control-heating & cooling, 67F - 83F

$9.99
34" TUBEAXIAL (AXIAL FLOW) FAN

$300.00
NEW TELEMECANIQUE CONTACTOR LA1 DN 22 120V 60HZ

$9.99
Dupont r22 30 lb can freon

$100.00
2 Stage Rotary Vane Deep Vacuum Pump 29.92"Hg 2CFM HVAC

$119.95
Yellow Jacket Ratcheting Tube Bender #60331 New in Box

$119.99
2 Schaeffer Flue Condenser Brush NIB Brushes 5/8 inch

$0.09
Wall Mounted Heat Pump with Heat Strips - Bard WH421A10

$2000.00
INFICION SHARK 6 VACUUM PUMP (FREE SHIPPING)

$192.50
TACO OO7 CIRCULATOR

$35.29
Air Brush/Flush Tool Kit Canister Hose Gun Assembly AC

$49.95
Varian Leak detector Porta test 938-41, vacuum pump

$1225.00
MARS 64 POTENTIAL RELAY LOT OF 5 63.64.65.67.68 ALSO

$15.50
GE 1/2 HP Fan motor

$35.00
TIF Gas Leak Detector for Combustible Gases TIF 8850

$21.99
GE Commerical Motor, 3/4 HP, 115V, 1110 RPM

$13.50