Integral LED Nightlight/Vacancy Sensor Control for Hotel Bathroom Lighting
Lighting Control for Hotel Bathroom: Motion Sensor Nightlight vs. Conventional Bathroom Lighting
Vacancy sensor control with integral LED night light and battery back-up. If the main lighting has been activated and no occupancy is detected the light is turned off and the nightlight comes on.
Synopsis:
Lights in the bathrooms of hotels, senior living centers, and nursing homes are frequently left on for extended periods — either due to forgetfulness or so that they can serve as night-lights. The night-light function is especially critical in senior housing, where tripping and falling can cause serious problems. Hotel managers in particular have been reluctant to use occupancy sensors in bathrooms because of concerns about lights turning off when bathrooms are occupied (an occurrence referred to as “false-off”). This product has set-back times from 15 minutes to 2 hours.
The California PIER program has worked with WattStopper to combine LED technology and vacancy sensors in one easy-to-install system. A demonstration done at the Sacramento Doubletree Hotel, resulted in 46 percent savings in energy usage and received positive comments from hotel guests.
Energy Savings: 45%
Energy Savings Rating: Limited Assessment
What's this?
| Level | Status | Description |
| 1 | Concept not validated | Claims of energy savings may not be credible due to lack of documentation or validation by unbiased experts. |
| 2 | Concept validated: | An unbiased expert has validated efficiency concepts through technical review and calculations based on engineering principles. |
| 3 | Limited assessment | An unbiased expert has measured technology characteristics and factors of energy use through one or more tests in typical applications with a clear baseline. |
| 4 | Extensive assessment | Additional testing in relevant applications and environments has increased knowledge of performance across a broad range of products, applications, and system conditions. |
| 5 | Comprehensive analysis | Results of lab and field tests have been used to develop methods for reliable prediction of performance across the range of intended applications. |
| 6 | Approved measure | Protocols for technology application are established and approved. |
Simple Payback is one tool used to estimate the cost-effectiveness of a proposed investment, such as the investment in an energy efficient technology. Simple payback indicates how many years it will take for the initial investment to "pay itself back." The basic formula for calculating a simple payback is:
Simple Payback = Incremental First Cost / Annual Savings
The Incremental Cost is determined by subtracting the Baseline First Cost from the Measure First Cost.
For New Construction, the Baseline First Cost is the cost to purchase the standard practice technology. The Measure First Cost is the cost of the alternative, more energy efficienct technology. Installation costs are not included, as it is assumed that installation costs are approximately the same for the Baseline and the Emerging Technology.
For Retrofit scenarios, the Baseline First Cost is $0, since the baseline scenario is to leave the existing equipment in place. The Emerging Technology First Cost is the Measure First Cost plus Installation Cost (the cost of the replacement technology, plus the labor cost to install it). Retrofit scenarios generally have a higher First Cost and longer Simple Paybacks than New Construction scenarios.
Simple Paybacks are called "simple" because they do not include details such as the time value of money or inflation, and often do not include operations and maintenance (O&M) costs or end-of-life disposal costs. However, they can still provide a powerful tool for a quick assessment of a proposed measure. These paybacks are rough estimates based upon best available data, and should be treated with caution. For major financial decisions, it is suggested that a full Lifecycle Cost Analysis be performed which includes the unique details of your situation.
The energy savings estimates are based upon an electric rate of $.09/kWh, and are calculated by comparing the range of estimated energy savings to the baseline energy use. For most technologies, this results in "Typical," "Fast" and "Slow" payback estimates, corresponding with the "Typical," "High" and "Low" estimates of energy savings, respectively.