There are a number of products on the market to produce the benefits of fast hot water. Not all of them are demand type systems. The true demand systems are the Chilipepper CP6000, and the Metlund D'mand Systems of which there are three or four models. There are also some companies that have licensed the Metlund technology and sell units identical to the Metlund pumps, but with a different brand name, such as Taco Pump companies version.

Other types of products also compete with the demand systems. There are what I call "luke warm" circulating systems like the RedyTemp, and the Laing Autocirc1. Although they are quite inferior in performance compared to demand systems, I will include them in the price comparison. These systems are not really all that green since they waste considerable amounts of energy while getting you hot water a little faster.

Here are the prices I have found online for the various products. This is as of May 2009.

Chilipepper hot water demand system. $179.99

Metlund D'mand System Model S-50T: $356.00

Metlund D'mand System Model S-70T: $463.75

Metlund D'mand System Model S-02T: $797.50

RedyTemp System: Model TL-4000-N $489.00

RedyTemp System: Model TL-5000-N $539.00

Grundfos Comfort System: $432.00

Laing Autocirc1 System: $285.00

And as for being the best system, Chilipepper wins that hands down.

The Chilipepper has as good or better warranty.
The same or better life expectancy.
Much more power, it will operate any tankless water heater.
You can hear it run, so you know when to turn on the hot water.
The only unit offering a 30 day unconditional money back guarantee!
The lowest price providing you with the highest ROI on your investment!

Chilipepper Sales 1380 Greg St., # 221 Sparks Nevada, 89431 (775)-359-1223