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Technical Data (may vary per unit)

Our in-room energy management solution combines infrared-based occupancy sensors and a microprocessor-based switching control module. It adjusts the temperature in a room to a "sold/unoccupied" mode when there are no guests in the room. The system automatically detects a guest upon entrance and restores the temperature to the guest’s desired temperature.
The sensors detect sleeping guests and "learn" when to switch to conservation mode. Conversely, the sensor will quickly return to the required temperature when guests rise. Our systems are custom designed for each property and specific HVAC unit. The system is designed to interface with any hospitality cooling, heating and ventilation system such as PTAC (Packaged Terminal Air Conditioner), PTHP (Packaged Terminal Heat Pumps), baseboard heaters, systems with central cooling towers, and FCU's (Fan Coil-Based Units).

The entire installation takes approximately 1.5 hours. We work around your guests to ensure no down time for your property while the conversion takes place. Our workmanship and materials are guaranteed for two years.

Call us today for a free assessment of your property as well as an ROI analysis.

Features:

  • Detects sleeping guests
  • Adjustable "switch on" timer
  • Ultra-sensitive and reliable
  • 40 X 40 m (140 x 140 ft) standard coverage
  • Over 1260 sq ft coverage
  • Surface, corner, flush or swivel bracket-mounting
  • Unique visible pattern locator

Specifications:
- OPTICAL
Standard Lens:

  • E-15 provides a 100° 38 x 38 m (125 x 125 ft) coverage pattern consisting of 58 beams in 3 detection layers
  • Interchangeable Lenses: E-15, E-34, E-18, E-52, E-51. Refer to lens library for complete description

Adjustment:

  • Vertical +10° to -20° calibrated scale; Horizontal up to 30°

- ELECTRICAL

  • Voltage: 12 - 28V DC / AC
  • Current Drain: 45 mA max (relay energized), 7 mA max quiescent current \
  • Relay Output: Form C contacts (Normally Open, Normally Closed), rated 5A resistive/24V AC
  • Relay "ON" Timer: Adjustable
  • LED: Walk-test (switchable)
  • Testing Facility: Diagnostic test point
  • Detector: Dual-element low-noise pyroelectric sensor
  • Sensitivity Control: Adjustable, up to 2.5 times normal range
  • Operating Temp.: -10°C to 50°C (14°F to 122°F)
  • Storage Temp.: -20° to 60°C ( -4°F to 140°F)
  • RFI Protection: Greater than 20V/m to 1000 MHz
  • Dimensions: 120 x 70 x 48 mm (4-3/4 x 2-3/4 x 1-7/8 in)
  • Weight: 140 g (4.5 oz)
  • Color: White

PATENTS

  • US, Canada 04 757 2836: 4,604,524 & Des. 286,383

INTERFACE WITH

  • 120V, 208V, 240V, 277V, 347V system
  • Fan Coil Units
  • Most heat pumps
  • PTAC (Packaged terminal air conditioner)
  • 2-pipe systems
  • 4-pipe system
  • Electric baseboards

OPTIONAL FEATURES

  • Window auto shut-off
  • Outside room

1.0 MEASURING AND VERIFICATION

1.1 How energy is saved

Energex EMS monitors the occupancy status of the guest room.
The system is based on a passive infrared occupancy sensor located in each room and connected via low-voltage wiring to a small energy management unit, which is installed in wall cavity behind the room thermostat. When occupancy is detected by the sensor – HVAC functions are maintained according to the wishes of the guest.

After a guest has left the room for longer then 30 minutes, the energy management unit maintains the last-selected temperature and “holds” it for approximately 12 minutes each hour – this results in HVAC energy savings of 35 – 45% while ensuring a quick return to the last known set point and a comfortable room condition.

Thus, equipment operating hours are reduced. The equipment load while operating remains unchanged.

1.2 Key Variables Affecting Savings


The key variables affecting the savings will be determined by a thorough project analysis. The key determinant of the project analysis will be based on the results of a Room HVAC system and type report. The information gathered in this survey is used to produce an accurate estimation of the total savings over a predetermined period of time.

For example, in a typical test the occupancy is the key variable. In an unsold room, housekeeping staff generally turns down the thermostat or turns off some or all PTAC functions. Savings benefits are not available in such rooms.

In addition, a sold “matched” room’s PTAC (with no EMS) will consume more energy per day than its “EMS-installed” room. So if “matched” rooms have a higher average occupancy than “EMS-installed” rooms, the energy savings will be overstated; if “matched” rooms have lower occupancy, the savings will be understated. See para 4.2 below for further information.

More generally, climate and weather are the overriding variables affecting savings. Heating and cooling degree-days generally are well-correlated to energy consumption so can affect savings dramatically unless data corrections are applied. If the “with-EMS” rooms and “without-EMS” rooms are well matched as to PTAC model, room location and size, weather is eliminated as a variable.

If weather conditions during the test period are significantly different from climatic averages, this will affect the projection of savings to a “full-property rollout”.
It is possible that, even with matched rooms, the PTACs may draw different amounts of electrical current when in operation due to aging or another effect. If so, this will become readily apparent when the logger data is examined and an adjustment can be applied if required.

2.0 MEASURING AND VERIFICATION APPROACH

The appropriate approach will be determined by an analysis of the project location and terms and will be presented by means of a written proposal.

3.0 DEFINITION AND DESCRIPTION OF CALCULATIONS

3.1 Analysis Tools

In most cases, Microsoft Excel will be the primary analysis tool.

3.2 Equations to be used

The equations used for analysis are based on the type of HVAC system, and will vary depending on the measuring equipment being used.

For example, loggers will measure average electrical current drawn by the four PTACs during the measurement interval. The duration of the measurement interval will be known in detail.

    • For the “matched” rooms used to measure baseline consumption:

    KWH.baseline = (SUM (voltage * Current.i * t.i))/1000


    Where: voltage = supply voltage for PTAC in volts
    Current.i = measured average current in amps
    t.i = sample time length interval in hours

    • For the “EMS-installed” rooms:

    KWH.EMS = (SUM (voltage * Current.i * t.i))/1000


    Where: voltage = supply voltage for PTAC in volts
    Current.i = measured average current in amps
    t.i = sample time length interval in hours

    • Occupancy Correction:

    Occ.baseline = percentage of “sold” days for each “matched” room during test period

    Occ.EMS = percentage of “sold” days for each “EMS-installed” room during test period

KWH saved = (KWH.baseline – KWH.EMS)*( Occ.EMS / Occ.baseline)
Note: this is calculated for each "pair" of rooms in the project.

Average KWH saved per room = Sum (KWH.saved)/2

3.3 Savings Calculation Path

The savings calculation path will vary depending on the HVAC system, and the type of measuring equipment being used.

Typical savings calculation procedure:

  • Download logger data to computer via serial port
  • Import data into Microsoft Excel, one worksheet for each room pair
  • Examine data for completeness and consistency
  • Eliminate or explain data anomalies
  • Apply formulae to data
  • Calculate savings

4.0 METERING EQUIPMENT

4.1 Specification of Metering Equipment

Energex will provide third party measurement equipment for specific installation in order to demonstrate and dramatize the energy savings potential of our technology.

Metering equipment provided by Energex may be ACR Systems, Teledyne or Onset.

Metering equipment used will be based on the results of the project analysis.
The logger is designed to sample ‘average RMS’ current five to ten times every minute, over a sample period of five to ten minutes, before writing the sample to memory. The loggers document the date and time along with each data sample.

4.2 Who Provides the Equipment
Metering equipment is provided by Energex.

4.3 Accuracy and Calibration
Energex will rely upon factory calibration of the equipment.

4.4 Metering Schedule
To be determined by project analysis and dependant on factors such as: HVAC system, and duration of testing installation.

4.5 Data Validation and Reporting
Logger data will be examined at regular intervals for contents, internal consistency, and compared to HVAC manufacturer’s specifications for electrical current load.

Once collected, the data will be analyzed as per para 4 above.

The data will be presented in a report (“Post-Test Proposal and Financial Analysis”). This report will provide the following information:

  • Estimated energy savings for a full-property roll-out
  • Implementation and maintenance costs
  • Impact of various control strategies
  • Benefits: maintenance savings, materials, labour, cost of downtime
  • Potential productivity increases
  • Estimated rebates or incentives (if any)
  • Costs and benefits: first cost, simple payback period, net present value, internal rate of return

4.6 Data Formats

Raw data retrieved from the logger is easily imported into Microsoft Excel for analysis.

Data elements from the logger have specific formats (for each sample)

Date and time: mm/dd/yyyyhh:mm
Channel 1: nnn.nnnnn (amps)
Channel 2: nnn.nnnnn (amps)

5.0 KEY ASSUMPTIONS

5.1 Significant variables (definition)

Significant variables will be independent to each project.

Guestroom occupancy is the most significant variable.

Room matching will eliminate weather variability concerns between baseline and EMS-installed data.

5.2 Significant unknowns (definition)

There is a possibility of logger or current sensor failure, which is mitigated by retrieving data at predetermined days during the testing period.

Logger or current sensor tampering could lead to missing or unusable data.

It is possible that weather during the test period could be either unusually benign or demanding. If so, this would skew the results. The chance of this is remote, given the duration of the test. Correction for such weather anomalies, if any, is beyond the scope of this test.

5.3 Stipulations

There are no stipulations. All relevant parameters are controlled or measured, subject to the assumptions below.

5.4 Other Assumptions

Other assumptions will be determined by project analysis.

For example, we may assume HVAC equipment in each room-pair is identical make and model.

6.0 BASELINE ADJUSTMENTS

Baseline adjustments will be made by the methods discussed in para 4 above.

7.0 SAMPLING

7.1 Description

Energex will connect logging devices to a specified number of rooms’ HVAC electrical current supply for a predetermined period of time, to continuously sample and record the ‘average RMS’ electric current drawn by each room’s HVAC device during the sampling period.

7.2 Sample size

The sample size will provide more than adequate detailed visibility and accuracy of actual electrical current being drawn by the “EMS-installed” and the “matched” rooms during the test period.

7.3 Selection of sample size

Sample size is determined by the capacity of the logger and the duration of the test.

7.4 Random sample points

Samples are taken at a fixed pre-determined time interval. This is the nature of the logging equipment. There would be no advantage to taking random data samples in this case.

8.0 QUALITY ASSURANCE

Energex will retrieve logger data to review it for consistency and accuracy and to check interim results.

Replication will be assured by correcting the final data for variations in occupancy, based on figures supplied by the hotel for the rooms being measured.

9.0 WARRANTY AND SAFETY

9.1 Warranty

To be specified upon project analysis. See para 12.0 below.

9.2 Safety Requirements

Energex will provide details of its UL and CSA approvals in the Post-Test Proposal and Financial Analysis.

9.3 Damage to Other Equipment

Damage to upstream or downstream equipment is highly unlikely. Any damage to equipment will be assessed immediately.

10.0 SYSTEM WARRANTY

Energex Power Saver Systems Inc. and/or its subsidiaries and its affiliates (“The manufacturer”) warrants its products hereinafter referred to as “the product” or “products” to be in conformance with its own plans and specifications and to be free of defects in materials and workmanship under normal use and service for a period of 24 months from the date of installation by a manufacturer authorized personnel. The manufacturer obligations shall be limited within the warranty period, at its option, to repair or replace the product or any part thereof.

This warranty does not apply in the following cases: misuse, failure to follow operating and maintenance instructions, alterations, abuse, accident or tampering and repair by anyone other then the manufacturer.

This warranty is exclusively and expressly in lieu of all other warranties, obligations or liabilities whether written, oral, expressed or implied, including any warranties of merchantability or fitness for a particular purpose, or otherwise. In no case shall the manufacturer be liable to anyone for any consequential or incidental damages for breach of this warranty or any other warranty.