It's a Tankless Job, but Somebody's Gotta Do It

Tankless water heaters are great. Instead of heating a whole container of water (as much as 40-50 gallons), a tankless water heater heats small amounts of water as it passes through your water pipes. The downside is, they cost a lot more than the traditional tank water heater. So, selling tankless water heaters to the public involves an educational process that falls to the salesperson.

Advertising's job is to catch the eye of the public with an immediate benefit.
We wanted to put signs up in all the stores to draw their attention to the tankless water heaters, and we needed something to catch the consumer's eye.

The advantage of the Tankless Water Heater is the "unlimited" hot water: you are no longer tied to a 40 gallon limit. No more "cold showers" if you are the last one up in a large family.

The advantage of the Tankless Water Heater is that it is an "on-demand" system: it heats the water when you use it. This appeals to the dollar-conscious consumer --  "Why should I pay for something that I'm not at home to use?" 

Again, an appeal to the dollar-conscious consumer --  why repeat unnecessary actions
when a Tankless Water Heater only heats the water when you use it! 

Another more colorful restatement of the benefit of the Tankless Water Heater -- it heats the water when you use it. Putting it into temporal terms of "Tomorrow Morning" and "This Afternoon" drives home the point of the traditional water heater's inefficiency for modern life.