Research Room Air Conditioning Tariff

Research Room Air Conditioning Tariff

Time tariff is applicable to HVAC central air conditioning wherein a/c use is based on the operating time of the room blower fan.

Energy tariff is not suited for central or VRV air conditioning as the power consumption information is not readily accessible, so time tariff is the way to go for both.

Classroom Air Conditioning Tariff

Classroom Air Conditioning Tariff

In a classroom that uses either VRV or central air conditioning, electricity tariff is not applicable, so only time tariff can be applied



Tariff based on elapsed time

Topping Up

Smart cards can be reloaded through the desktop credit dispenser


Card reader display
  • The card reader should be installed near the living or activity space for convenient access.
  • Power: User inserts card to get power.
  • Tariff: Works like a prepaid style phone card, credit is deducted as time elapses.
  • Finished Using: Removing card cuts off power.
  • Topping Up: User just buys a loaded smart card to use; once used up, the card can be reloaded and reused.

Suitable A/Cs

Can be used for various types of air conditioners including: central a/c, split-type a/c, window type, standing box type, and variable frequency a/c.

Various suitable a/c types

Energy Saving

Classroom Air Conditioning


  1. Change Behavior: When the user pays, they become more conscientious of their energy use and will try to conserve energy as extraneous use comes out their own pocket.
  2. Managed Use: Having a card before being able to use is also a form of managed use, as only authorized personnel will possess a card and can use the a/c.
  3. Time Based Tariff: Certain a/c types is not amenable to electricity metering as the electricity used is not directly measurable; in these cases, one can meter the elapsed time instead; but regardless of whether the purpose is for tariffing or to save energy, time based tariffing is the best solution.

Classroom Energy Saving Air Conditioning Control

During classes, the instructor inserts the card to enable the a/c; after class, the card is removed and power is cut off.

Long Term Rental Tariff

For the purpose of air conditioning tariff by stall, one can make use of a user pays model.


Faculty Research Room

Faculty Research Rooms

Small Offices

Small Offices

Short Term Rental Tariff

Available anytime simply by buying a prepaid card. Insert card to get power, remove card to stop, pay only for the time used.

Work Room Rental

Hotel Room Air Conditioning

Ball Court Lighting

Insert To Use

research room

Research Room

  1. The card reader only recognizes the card and not the person who carries it; the card can be used on any card reader, making this a true user pays system.
  2. Display the remaining credits, when the credits are used up, the power ceases.
  3. Three possible ways to tariff:
    1. Inserting card immediately starts tariff
    2. Tariff while the valve is on
    3. Tariff while the fan is operating

(1) Time Tariff

Tariff based on elapsed time

(2) Valve Tariff

Tariff while the valve is on

(3) Fan Tariff

Tariff based on the fan operating time

Tariff Rate

Standalone Card Reader

Standalone card reader

Card reader tariff stores the tariff rate within the card reader itself, since the size and capacity of each a/c may differ, the elapsed time for each a/c does not consume the same amount of resource and each a/c should have its own tariff rate. The tariff rate within the card reader can only be changed using a special tariff rate setup card.

Card Reader With Uplink

Card reader with uplink

If the card reader has an uplink to a remote host, then the card reader tariff can be changed remotely through the host. The advantage to this is that the tariff rate can be changed very quickly and easily without having someone go to each site which is time consuming and inconvenient. This approach is best suited for installations with a large number of card readers and for when the tariff needs to be constantly changed due to the changing seasons.

Host Uplink

Using the EnergyLink auto meter reading software
Host with auto meter reading software


  • Displays the status of every load controller unit.
  • Displays the remaining credits for every inserted card, and the operating mode: forced on, forced off, normal card reader control.
  • The load can be forcefully turned on or off without regard to the presence of the card.
  • The tariff rate can be changed remotely.
  • This system requires the LB500 or LB1500 load controller.