To help you find the best Plasma or LCD TV to purchase, we have developed an energy efficiency rating scheme for the TV's in our database.
We have introduced these ratings due to consumer demand and in anticipation of the introduction of Energy Star Ratings for TV's which is likely to happen in the future.
Energy Efficiency Measurement
To achieve a fair comparison of energy efficiency across all screen sizes and technologies, we have developed an energy efficiency measure based on the amount of power (watts) consumed per square centimetre of screen space. This power per unit of service delivered is typical of the ratings systems developed for other electrical appliances (e.g. refrigerators) by government standards organizations including the Australian Government Energy Rating Initiative.
For each TV we calculate the Energy Efficiency as the screen area (cm2) that 1 watt of energy can power. A TV with a higher figure is thus more energy efficient. The Energy Efficiency is calculated using the screen size* and power* consumption data provided by manufacturers.
Energy Efficiency Rating Index
Using the Energy Efficiency measurements, we then calculate an efficiency rating index from 1 to 5 using the Australian Energy Star Ratings Index algorithm (Post 2000). 5 is the most energy efficient and 1 is the least efficient. In general, a TV with a rating of 4 will be 20% more energy efficient than a TV with a rating of 3.
The energy efficiency rating is a relative measure and is only useful in determining the relative energy efficiency between two TV's. It is not indicative of the absolute amount of energy a TV will consume.
Total Energy Consumption
To assist you in understanding the total (or absolute) energy consumption of the device we provide the TV's power consumption* (watts) as published by the manufacturer.
Environmental Impact
To assist you in understanding the environmental impact of running a television we provide a greenhouse gas emissions calculation based on:
- The TV's power consumption.
- The average viewing habits of Australian viewers
- The energy emission factor is published by the Australian Greenhouse Office.
The default values for this calculation are:
Average hours per day that the TV is on: 6 hours
Energy emission factor for the state of Victoria: 1.239
We have also provided an energy calculator so you can adjust the the average viewing hours and see your total power consumption and greenhouse gas emissions over the lifetime of the TV. The energy calculator is customised for each TV and can be found on the TV production specification pages.
With this data available via our innovative comparison engine technology you will be able to easily find a TV that both meets your needs and is as environmentally friendly as current technology permits.
See our most energy efficient Plasma and LCD TV's.
* Figures are taken from published manufacturers specifications and are subject to change by the manufacturer from time to time.
More from Comparison Net...
> Compare over 150 Plasma and LCD TV models
Three simple steps to find the TV model you want:
1. Narrow your search by brand, price range or feature.
2. Select a shortlist of televisions to compare, side by side.
3. Find reputable stores near you.
> Check out our Digital Television Buyers Guide
A comprehensive buyers guide for Plasma and LCD TVs - there's lots to consider when choosing the dream television to live at heart of your lounge room.
> LCD, Plasma and Digital Terms explained
HDTV, HDCP, HDMI, Plasma, LCD??? Check out our jargon busting glossary for digital television.
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