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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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NEW ICP RIELLO 40 BF5 OIL BURNER N01F010 FURNACE WATER

$437.00
Greenheck Centrifugal Fan 13-BIDW-21-3-CW-TH-I *NEW*

$199.99
NEW RHEEM SINGLE STAGE GAS FURNACE HVAC RGPP05EAUER

$425.00
NEW ICP LINCOLN GAS FURNACE 90% HVAC N9MP2050B12

$725.00
COPELAND CRDQ-0200-TF5-590 60HZ Compressor

$69.99
Johnson Controls Companion Supervisory Controller

$150.00
Malco C-1 Crimper

$3.25
C39011 Electra-Kool 1000A Blower w/ Dayton 1hp Motor

$59.99
Lot of 2 Cadium Sulphide Flame Detector C554A 1463 oil

$725.98
Lytron Radiator And Fan Assembly Heat Exchanger Cooler

$49.99
KEEPRITE ICP SCROLL 4 TON AIR A/C CAC048AKC + "A" COIL

$760.00
SF6 R12 R22 Refrigerant & GAS Recovery Recycling Tank

$6500.00
Johnson Controls Companion Supervisory Controller

$75.00
Armstrong Steam Trap Valve #2011; Steam Trap Kit; *A8

$9.99
18/8 THERMOSTAT WIRE 4 ROLLS1000 FEET BRAND NEW LOOK!!!

$102.50
GRAB BAG EXPANDER MANDREL BOILER HEATING CONDENSER

$19.95
NIKRO DUCT CLEANER MOD, HP20GAS

$1500.00
NEW SOLARONICS 200,000btu INFRARED HEATER K200DSAN

$865.00
Micro Air Corp THERMOSTAT Air Conditioning System

$1900.00
Lot of 8 Lenox Hole Saws - 10L 5/8" Bi-Metal NIB

$18.00
Alerton BACtalk VLC-1188 DDC Controller

$61.00
APRILAIRE 1180 COMMERCIAL HUMIDIFIER HVAC FURNACE

$1280.00
SIEBE Barber Coleman Environmental Controls

$50.00
Bell & Gossett 1-1/2" CTS Circuit Setter

$25.00
New 10" Round Krueger Steel Perforated Diffuser 6500

$43.66
CPS 700S Commercial Recovery Machine NEW!!! SEALED!!!

$400.00
Honeywell Aquastat (L8148A-1017)

$40.00
NEW SOLARONICS 40,000btu INFRARED HEATER K40DSAN

$380.00
Manifold Gauge Set 5' High Pressure R407 R134A R404 R22

$69.95
Allanson Neon Transformer 7500 Volts - 2225S

$4.99
(4) Johnson Controls A19DAC-10C Temperature Control

$75.00
sheet metal tools

$4300.00
Digital Temperature Probe

$12.00
Johnson Controls Metasys AS-VAVDPT2-1

$20.00
ROBINAIR DIAL-A-CHARGE HVAC CHARGING CYLINDER WITH CASE

$109.99
5 ROLLS OF FACTORY SEALED IDEAL SEAL ALUMNIUM FOIL TAPE

$10.50
1 HONEYWELL H600A 1014 HUMIDISTAT NEW

$9.99
Buffalo Limit load Fan Size 540 460 v 3 Phase

$995.00
KEEPRITE ICP SCROLL 2.5 TON 14 seer AIR CONDITIONER

$950.00
leak detector locator pipe locator water Free Shipping

$19.95
NEW Copeland 3 Ton Air Condition Compressor

$11.00
Silver Brazing Rod (57% Silver) Eutectic Flux Coated

$90.00
GAS LEAK DETECTOR--GAS FINDER BY CCI CONTROLS

$80.00
Armstrong Circuit Balancing Valve Slide Rule, HVAC, MC

$2.24
BACKDRAFT DAMPER 8 inch inline fan exhaust hvac

$20.00
Electronic Halogen Refrigerant Leak Detector AC/HVAC/R

$47.75
Greenheck Plenum Fan 18-PLN-HORZ-I-LMD *NEW*

$199.99
NEW ICP KEEPRITE DELUXE 80 GAS FURNACE C8MPT125J20A

$775.00
HONEYWELL SMART TRANSMITTER ST.3000 LOT1

$59.99
RANCO SOLENOID COIL FOR REVERSING VALVES LDK-11000-070

$9.99
New 12" Round Krueger Steel Perforated Diffuser 6500

$43.66
Hoffman Specialty FT015H-8 Float & Thermostatic Traps

$2.25
New KI&BNT HVAC Halogen Freon Refrigerant Leak Detector

$62.99
New 12" Round Kruege Steel Louvered Diffusers Model1400

$44.66
SIEBE Barber- Colman MICROZONE II

$250.00
Dayton Industrial Motor 3/4 hp 3 phase Model 3N042 NEW

$39.95
1/2-HP Dayton Belt Drive Motor 4K259G 115/203-230V NIB

$12.00
Smoke Pro Automotive Leak Detector - Model 95-0003

$305.00
Mars Commercial Refrigeration Thermostat F1-4-676 NIB!

$9.99
Honeywell R8184G 1005 Oil Burner Control

$6.99
PlumBest 40-240 Degree Thermometer

$5.00
(2) Johnson Controls P32AF-2C Pressure Switch

$29.99
NEW SOLARONICS 80,000btu INFRARED TUBE HEATER ST80-3040

$399.00
Sporlan Thermostatic Expansion Valve - R-12 SFE 1/2 C

$8.99
19 Book CD * HVAC Air Conditioning | HEATING Manuals CD

$0.99
NEW KEEPRITE DC 2 STAGE GAS FURNACE HVAC C8MPV050B12A

$900.00
Climet CI-8060 Partical Counter

$104.99
NEW SOLARONICS 80,000btu INFRARED TUBE HEATER ST80-2025

$399.00
Refrigerant 12 Oil Charge 2oz. Mineral Oil & 2 oz. R12

$6.95
NEW SOLARONICS 40,000btu INFRARED HEATER K40QSAN

$380.00
New 6" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
Greenheck Centrifugal Fan 18-BIDW-21-3-CCW-TH *NEW*

$199.99
2 Taco ACUF-050 Balancing Valves 1/2" Sweat New

$9.99
NEW COOLER COMPRESSOR CONDENSOR & EVAPORATOR KIT 1/2hp+

$760.00
YORK SHIPLEY 150 HP BOILER 150 PSI STEAM

$24995.00
Bell & Gossett 2" CTS Circuit Setter

$30.00
NEW SOLARONICS 150,000btu INFRARED TUBE HEATER ST150N

$399.00
New 8" Round Krueger Steel Louvered Diffuser Model 1400

$44.66
Mongoose Refrigerant Recovery Pump 20001105

$150.00
SEE-ALL SPORLAN # SA-13S SIGHT GLASS FOR REFRIG OR A/C

$12.99
VES Pittsburgh Lock Hammer Air Pneumatic Lock-former NR

$137.50
Dwyer Magnehelic Gauge 0-5 inches of Water Cat# 2005C

$9.99
Boiler Furnace Heat Oil Gas Coal HVAC 19book CD Library

$0.01
Lot Of Imperial Eastman Tubing Tools Flare Swagging ETC

$27.00
NEW TECUMSEH HVAC REFRIGERATION COMPRESSOR AGA5561EXH

$399.00
New 10" Rnd. Krueger Steel Louvered Diffuser Model 1400

$44.66
Cito Stackflow Hand Valve With Flow Turbine {NEW! NICE}

$29.99
Johnson Controls Companion Supervisory Controller

$150.00
Electro Impulse Inc. Cooling Unit 31033

$629.99
MARS SWITCHING RELAYS LOT OF 3 24V COIL NIB SPST SPDT

$9.99
Ashcroft Duragauge 100 PSI

$10.00
General Training Air Conditioning Self Study Workbooks

$15.50
NEW GSW JOHN WOOD GAS WATER HEATER 6G50BFNA-02

$625.00
Danfoss 175H7367 HVAC Variable Speed Drive

$99.99
Johnson Controls EN-EWC25-0 Enclosure

$65.00
NEW SOLARONICS 40,000btu INFRARED TUBE HEATER ST-40-20N

$369.00
NEW - Grundfos UPS15-58 FRC Circulator Pump - NEW

$60.00
c&D VALVE CORES B10-740 25 PER PACK

$4.99