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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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Amtrol 15 Expansion Tank

$10.50
HOFFMAN ITT INVERTED 3/4 IN. BUCKET STEAM TRAP B1125S-3

$11.50
Honeywell Burner Control Controlbus Mod QS7850 A 1006

$29.99
Gordon Piatt F18 -1-G-200 Burner for boiler steam hot

$3900.00
TRACERLINE AC & LEAK DETECTOR KIT WITH CASE (W)

$13.26
New 4" Metal Inline Duct Fan 200 CFM Corded Exhaust Fan

$89.95
200 CFM 115 VAC MUFFIN FAN

$5.00
HVAC BULLET PIERCING VALVES LINE TAP LOT OF 5 NIB

$3.25
22 New Carrier ThinLINE Container Refrigeration Units

$74999.00
Lot of 2 Honeywell T8011R 1006 Programmable Thermostats

$21.75
BRAND NEW IN CASE TAP & DIE SET - NEVER USED!!!

$125.00
Lot of 9 Honeywell R8222D1014 DPDT Relays New

$57.00
Paxton Product-Centrifugal Blower NT 800M/F, Tatung

$209.72
hft40 line voltage flame proof thermostat switch heatex

$75.00
A.O. SMITH SOURCE 1 1/2 HP MOTOR F48L16A50 02426053000

$49.99
1" HONEYWELL MOTORIZED ZONE VALVE 24V V8043F1051 * NIB

$20.52
Amtrol 30 Expansion Tank

$5.15
Amtrol 30 Expansion Tank

$7.50
TurboTorch (Oxy/Acetylene Regulators) & 12-1/2 Ft Hose

$37.00
2 HP Cincinnati fan

$10.00
Taco Zone Valve Power Head 555-050 RP

$25.01
Trane PCM Board

$420.00
Ammonia Refrigeration Repair Parts Maintenance York

$275.00
Blue Point ACT 725 HVAC Leak Detector D'tector in Case

$89.00
Alerton BACtalk VLC-1188 DDC Controller

$50.00
PIPE CRIMPER C5

$1.04
Industrial Heater

$200.00
6 - ICM HARDSTARTS

$39.00
Fieldpiece Stick Meter HS35, ACH4 Clamp, ATH4 Temp head

$84.67
Honeywell MS7510A2008 Spring Return Actuator

$0.99
Scot 96 FramePump water pump WEG EX5990 Centrifugal

$995.00
Copper Tube Extensions Fit Access Valves 5 pack A31003

$4.99
NEW BUTANE MICRO TORCH WELDING SOLDERING DENTAL BURNER

$1.99
infrared dynamics sunpak 34000 btu heater gas heater

$20.00
APC AirFlow 5 ton Data Center AC Water Cooled Upflow

$595.00
VAV-110-1 Johnson Controls VAV Controller Metasys

$49.99
H10PM ALL Refrigerant Leak Detector Battery Charger

$2.99
Webster JB3G-75 Nat gas burner 4 boiler steam hot water

$4250.00
50 Lb. R-134a A/C Tank

$200.00
Honeywell Burner Control Network Interface Unit

$39.99
Watsco model WCG-5 refrigerant recovery unit

$250.00
Honeywell Burner Control Keyboard S7800 A 1001

$102.50
Carrier Transicold Coil Kit # 50021-02

$11.95
LEAK DETECTION DYE 8 0Z 100%

$20.00
KMC CSP-5002 ELECTRIC ANOLOG CONTROLLER ACTUATOR NEW!

$125.00
2 oz Compressor Oil/Flurescent Dye Injector HVAC/R Tool

$45.75
42" Industrial Fans Qty: 1; Manufacturer: Model: PB-42

$225.00
Amtrol 15 Expansion Tank

$11.67
19 Book CD * HVAC Air Conditioning | HEATING ManualsCD

$0.99
A.O. SMITH SOURCE 1 1/2 HP MOTOR F48L17A50 02426044000

$49.99
Amtrol 15 Expansion Tank

$10.50
"The Big Chill" Blower

$75.00
Milwaukee Right Angle Drill 1107-1

$109.99
GE 1075 1/2hp 110v 3 Speed Furnace Blower Motor 3587

$16.05
ITT Standard U Tube Heat Exchanger 27" long x 4" dia.

$499.00
REFRIGERANT RECOVERY SYSTEMS INC. MODEL ST-100, HVAC

$400.00
Danfoss Maneurop Reciprocating Compressor #MTZ28=4VM

$250.00
GE Universal Reversable Condensor Motor 5KCP39PGS618

$29.99
Tennsmith S48 22 GA Sheet Metal Bench Brake with Stand

$525.00
HVAC USED YELLOW JACKET A/C VACUUM PUMP

$175.00
Honeywell T6065A1005 Wide Control Range Thermostat NEW

$10.50
GE Universal Reversable Condensor Fan Motor

$29.99
IMPERIAL FREON TESTOR #423-CR #425-CB R-22 R-12 R-502

$26.55
Universal Radiator Pressure Tester

$220.00
Industrial Scientific T40 Rattler Personal Gas Detector

$34.64
ALCO Extra Klean EK-083 Refrigerant Filter Dryer *NEW

$7.99
Gordon Piatt F16 Burner Gas Oil,boiler,steam,hot water

$5950.00
Alerton BACtalk VAV-SD Single Duct VAV Control NEW

$31.00
Cleaver Brooks Steam 200 HP Boiler

$18500.00
Amtrol 30 Expansion Tank

$7.00
CARRIER REVERSING VALVE EF17BE181 OLD STOCK NEW IN BOX

$100.00
R134A Brass Manifold Gauge Set with Couplers

$50.00
Sussman Electric Boiler SSB80

$6000.00
Alco Refrigerant Solenoid Valve 240RA9T7T NIB

$29.99
UNI FILTER MODEL #99 FUEL OIL FILTER

$1.99
MILWAUKEE PORTABAN #6230 DEEP CUT BAND SAW w/ BLADES

$225.00
SHEET METAL/BODY WORK HAND TOOLS ASSORTMENT (USED)

$13.00
Mountain 1.5 CFM A/C Vacuum Pump MTN8403

$119.95
7.5 Ton, Self-Contained, Air Conditioning Unit

$895.00
HVAC Air Conditioning Heating Ventilation 19Manuals CD

$0.01
Air Conditioner - Water Cooled

$500.00
5 NIB J/B REFRIGERATION GAUGE red

$20.00
Air-Vac A/C Vacuum Pump Evacuation R-134A R22 R12 NEW

$19.99
TECUMSEH COMPRESSOR Model:AJA7441AXD 1/2 HP

$175.00
Honeywell Burner Control RM7838B1013 S7800A R7847 C1005

$149.99
1/4X5/16" Adapter Connector Coupler Ball Valve Set HVAC

$39.95
DX-9100 Johnson Controls PADA00001AH0 Metasys

$525.00
Air Brush/Flush/Cleaning Tool Kit Canister Hose Gun AC

$49.75
Honeywell Hot Surface Ignition Module S8910U-1000

$29.99
Lau Direct Drive Blower Fan Squirrel Cage Assembly HVAC

$19.99
FOUR 30 LB. BOTTLES OF R-12 REFRIGERANT - NO RESERVE

$660.51
DUAL BLOWER SQUIRREL CAGE FAN WITH MULTY SPEED MOTOR

$50.00
WERNER 8 FT. ALUMIUM LADDER ~ LQQK ~

$100.00
SPIRAX SARCO REMOTE ONE WAY TERMINAL NIB

$14.00
Honeywell Burner Control Controlbus Mod QS7800 A 1001

$29.99
NIAGARA COMBINATION ROTARY MACHINE 18 GA PEXTO TYPE

$499.00
Amtrol 15 Expansion Tank

$11.17
SPIRAX SARCO REMOTE ONE WAY TERMINAL NIB

$14.00
ITT No. 150 SHD Low Water Cut-Off/Pump Controller NIB

$173.63
Heat Exchanger, Titanium, w/304 Stainless Steel Flangs

$495.00