Todays deals on Unit Heating?

Hoffman PROAIR XR-2916-001H HEAT EXCHANGER UNIT $899.99

Seven Associates B-1A Induction Heating Unit (Sale) $649.00

MK-V TVME HEAT1 UNIT- I/O Board $600.00

United Electric Heat Tracing Controller 120vac 30a $400.00

Barber Colman 80GA-10103-001-V-00 A Maco Pac 8000 H/C Module Heat / Cool Unit $360.00

High Current Diode Rectifying Unit with Large Heat Sink $300.00

Mclean Midwest Chiller Unit XR-2016-003 Heat Exchanger $200.00

Joslyn Clark Overload Thermal Heating Units Assorted $220.99

1 USED HEATED TANK CONTROL UNIT COMPLETE UP 1102 $200.00

USED Trane Tracer ZN524 Unit Controller for Water Source Heat Pumps $200.00

Watlow: 2- RAYMAX Model # 1525 Heating Units 400W, 120V (Custom Mounted) $175.00

Thermon Heat Tracing Control and Monitoring Unit Model #TC202a-SSR-240-CIRT $149.99

Varian NL1879 National Heat Exchanger Unit NEW-NO BOX $159.00

NEW Omron E32-D73 2M Photoelectric Switch Fiber Unit Heat Resistant $149.99

TEMPCO TSPO1979 HEATING UNIT W/ CONTROL NEW $125.00

Allen Bradley Thermal Overload Heating Units N19 NIB $59.49

30AWG Insulated Heating Resistance Wire SPC Habia Cable 100FT/UNIT $44.99

STEMCO 351-29500 MOD.101D HEAT CONTROL UNIT NNB $38.00

Allen Bradley Thermal Overload Heating Units N17 NIB $42.49

Allen Bradley Thermal Overload Heating Units N11 NIB $42.49

Jolt Heating Unit Heating Unit removed from Jolt Transparency $39.65

N6 Allen Bradley Overload Thermal Unit Heating Element $26.24

Allen Bradley Thermal Overload Heating Units N34 NIB $33.99

Allen Bradley Thermal Overload Heating Units N58 NIB $33.99

Allen Bradley Thermal Overload Heating Units N3 NIB $33.99

Appliance Part-Overstock-Heating”United Technol Intermittent module” -Never Used $29.99

LOT OF 3 CUTLER-HAMMER H1040 OVERLOAD THERMAL UNIT HEATING ELEMENTS $32.95

Heating Cooling Control NTC Temperature Controller Unit $32.41

Heating Cooling Control NTC Temperature Controller Unit $32.40

Heating Cooling Control NTC Temperature Controller Unit $32.32

Heating Cooling Control NTC Temperature Controller Unit $31.49

Heating Cooling Control NTC Temperature Controller Unit $31.47

Allen Bradley Thermal Overload Heating Units N45 NIB $29.74

Allen Bradley P Series Overload Heating Units Lot of 11 $29.74

Allen Bradley Assorted Heating Units P8, P10, P12 NIB $29.74

LOT OF 4 SQUARE D 17.5 OVERLOAD THERMAL RELAY HEATING UNITS NNB $27.00

Allen Bradley Thermal Overload Heating Units N26 NIB $25.49

Allen Bradley Thermal Overload Heating Units N24 NIB $25.49

Allen Bradley Thermal Overload Heating Units N46 NIB $25.49

Allen Bradley 1P Series Overload Heating Units Lot of 9 $25.49

Heating Cooling Control Electronic Temperature Controller Unit $25.43

Heating Cooling Control Electronic Temperature Controller Unit $25.09

100 Units Heat Sinks Insulation Bushing And Film TO-220 $24.99

100 Units Heat Sinks Insulation Bushing And Film TO-220 $24.99

Heating Cooling Control Electronic Temperature Controller Unit $24.94

Heating Cooling Control Electronic Temperature Controller Unit $24.58

Heating Cooling Control Electronic Temperature Controller Unit $24.58

HS04# 100 Units Heat Sinks Insulation Bushing And Film TO-220 $23.99

Westinghouse 177C524G30 OVERLOAD THERMAL UNIT HEATING ELEMENT (Lot of 2) $22.49

Square D B6.9 Overload Relay Thermal Unit Heating Element Heater Motor Starter $21.95

Square D B14.0 Overload Relay Thermal Unit Heating Element Heater Motor Starter $21.95

Square D AR5.3 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR13.6 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR15.4 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR17.6 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR20.5 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR55 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR72 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AR86 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU64 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU81 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU88 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU99 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU110 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU198 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU235 Thermal Unit Overload Heater Heat Coil, New $14.95

Square D AU258 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K26 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K27 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K28 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K29 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K32 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K34 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K36 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K37 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K41 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K52 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K54 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K50 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K56 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K58 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K60 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K61 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K62 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K67 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K68 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K70 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K49 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K72 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K73 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K75 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K76 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K77 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K78 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K85 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K86 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K87 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K88 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K89 Thermal Unit Overload Heater Heat Coil, New $14.95

Furnas K92 Thermal Unit Overload Heater Heat Coil, New $14.95

Unit Heating Questions

Classification of Mainstream China Domestic Heat Pumps

In recent years China heat pump industry are developing fast. The China-made heat pump water heaters are sold at large quantity both in domestic and overseas markets. However, based on our experience of exporting business, many overseas customers don’t have enough knowledge on heat pumps and don’t know the different types of heat pumps, particularly of domestic heat pumps (also called household heat pumps, residential heat pumps in some countries). That will lead to mistaken consideration on both prices and product performances when overseas buyers are sourcing heat pumps from China. Tell me how to classify domestic heat pumps? I guess 90% answers will be “mono-bloc” type and “split type, like this:

A mono-block type domestic heat pump.  The heat pump  and the water tank are integrated into one unit. The good of this type is installation convenience.

A split type domestic heat pump. The heat pump and the water tank are separated and connected with pipes and wires. The good of this type is the heat pump can be put outside to reduce the noise indoor.

However,  ”split” and “mono-bloc” classification is not the most important. The more important feature is: how the heat pumps work? How they transfer heat to water in tanks? instead of how the heat pumps look like. So, domestic heat pumps are classified to static-heating type (refrigerant-cycle type) and dynamic-heating type (water-cycle) type. The most important classification should be made according to how heat is transferred to water in tanks. Thus the domestic heat pumps can be classified into 2 types:

• Static-heating type (refrigerant-cycle type); and
• dynamic-heating type (water-cycle type).

And they are very different products according to the heat exchanging method.

 

static-heating type domestic heat pump. Notice there’re heat exchangers (coils) in tanks of such heat pumps.

An exterior appearance of a static heating type domestic heat pump.

Let’s look into a static heating type domestic heat pump (split type) first. A installed static-heating type (refrigerant-cycle type) domestic heat pump (split type), the apparent feature of which is refrigerant (gas) pipes connect the heat pump and the water tank.  The pipes go into the water tank then become heat exchagners in it.

Internal structure and working principle of a static-heating type (refrigerant-cycle type) domestic heat pump (split type), from which we can see it’s coils and pipes including refrigerant that transfer heat to water in the tank. (Pay attention to the red words on the image.)

Let’s continue and look into the other type-dynamic 　heating type domestic heat pumps. From this type we can’t see exposed refrigerant　pipes outside any longer. Yes, they’re all in　heat pumps (main units). Heat exchange is done in the heat pump (not in water tanks like static-heating type). And the installation becomes simple too. Only water pipes (pay attention to the red words on the image) connect heat pumps and tanks. Not only that, the refrigerant leakage possibility becomes less  and heat exchanging  become more fully. In addition, should you want to put a heat pump on your existing water tanks, it becomes possible for the tanks without coils (which is more popular design of tanks).

Now we have talked about the difference between static and dynamic heating type. Above are all for split type domestic heat pumps. If it’s mono-bloc type, the principle are same. Just the heat pump and the tank are integrated into one cabinet.

Overall, dynamic-heating type is more superior tech in respects of Eco-friendship, installation, safety and heating exchanging. The good of static-heating type is they’re cheaper. (almost $100 cheaper per unit). Manufacturing costs of dynamic-heating type type is higher. So far, the majority of China manufactures are producing static-heating type (refrigerant-cycle  type), like most of manufacturers in Guangdong Province. Only minority of China manufacturers maturely control the tech of dynamic-heating type, like Wave Heat Pump water heaters.

About the Author

Maganger of overseas marketing dept., Wave Heat Pump. Specialized in air-water heat pumps, heat pump water heaters, and water heating solutions. Know global heat pump industry well.

The categories include domestic heat pump information, commercial heat pump information and swimming pool heat pump information.

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