At my shop we use a Thermax Therminator DV12:
* Powerful dual two-stage vacuum motors (165� water lift) for faster cleaning, increased recovery speed and quicker drying time.
* Built-in 1800-watt solution pre-heating system for quick, uniform temperature control (up to 175°).
* 11-Gallon hygienic stainless steel solution tank.
* 12-Gallon large capacity recovery tank with automatic overflow protection shut-off and waste gate empty system.
* Single 25' power cord for one circuit operation.
* High-impact, chemical resistant housing with conditional lifetime warranty - virtually indestructible.
* 100 psi high-efficiency demand solution pump (65-psi pump option available for auto detailing).
* Engineered for mobility and stability, tip resistant operation.
* Built-in dolly handle for greater control and maneuverability.
* Large 8� rear wheels make it easy to go up and down stairs.
* Marine sealed switches.
There is really nothing else to say other than it kicks ***. It has probably sped my steam cleaning up 20% since we got it.