Banner Ad for a Holding Page of a Website - Energy Express

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This customer received 20 banner ad designs from 8 designers. They chose this banner ad design from Kumar Gaurav as the winning design.
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Banner Ad Design Brief
We require a sort of banner ad or an impactful image to use in the holding page, while we work on a final worksite, while providing basic information about the project.
In other words, a nice image instead of (or in addition to) using the boring "under construction" text.
The project is a new service, which consists of sending highly trained energy efficiency technicians to homes for a 2 hour intervention in order to help householders improve the energy efficiency of their homes. These interventions consist of adjusting the central thermostat, maybe installing thermostatic valves on the radiators, low consumption lightbulbs, etc. In addition, these technicians will also provide the householders advise for improving the energy efficiency of their homes, e.g. length of showers, more efficient ways of cooking, washing, etc. I'm attaching a couple of ideas (banner 1 & 2) that I like in terms of nice and different images for the holding page banner. Also, feel free to google the following measures we install or adjust: thermostatic radiator valves, room or central thermostats, LED lightbulbs or low consumption light bulbs. Which might trigger some nice ideas for this banner. I'm looking forward to seeing your proposals or let me know if you need further information (I'm attaching also an initial write up about the project).
March 6th:
I've just added a file with the current thinking on the holding page (including a top logo). Please note the red section, which is the specific image briefed to Design Crowd designers. The project is not the whole page, it is only the "under construction" image. Thanks
Target Market(s)
Mainly households interested in energy saving, due to high costs of energy, the environment or improving comfort.
Industry/Entity Type
Construction
Colors
Designer to choose colors to be used in the design.
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- Convey the idea of under construction or coming soon.
Creativity relevant to the project.