The FVIR-compliant ProLine 40-Gallon Direct Vent Natural Gas Water Heater is to designed to draw air from outside the home, eliminating problems caused by insufficient indoor ventilation. The unit has horizontal air intake and venting on all models up to 80" from the outside wall with no electrical power needed. Featuring a 40-gallon (nominal) tank and a 38,000 BTU gas burner, the GDV-40 Direct Vent delivers a first hour rating of 64 gallons and a recovery rate of 41 gallons per hour. It carries a 6-year limited tank warranty, and meets Low NOx emission requirements. Environmentally-friendly insulation and factory-installed heat trap nipples reduce heat loss for maximum energy savings. This ProLine water heater is designed with A. O. Smith's superior commercial-grade tank protection. Advanced tank features include stainless steel CoreGard anode rod, Blue Diamond glass lining and DynaClean automatic sediment-cleaning system, all designed to help protect the tank from the corrosive effects of water and extend the life of the water heater. A. O. Smith's ProLine water heaters are residential products built to commercial-grade standards and are only available for purchase through professional wholesalers and contractors.
| Intended Household: | 2-3 Person |
|---|---|
| Application: | Plumbing |
| Capacity (Gallons): | 39 |
| BTU Input: | 38000 |
| Fuel Type: | Natural Gas |
| Energy Star Rated: | No |
| Energy Factor: | 0.60 |
| Vent Size: | 4" 6" 3" 5" |
| Vent Type: | Direct Vent |
| Water Connection: | 3/4" |
| ASME: | No |
| Max Pressure (PSI): | 150 |
| Gas Connection: | 1/2" |
| Depth (Inches): | 25-1/4" |
| 1st Hour Delivery (Gallons): | 73 |
| Recovery 90°F Rise: | 41 GPH |
| Max Altitude (Feet): | 7700 |
| Diameter (Inches): | 22-1/4" |
| Height (Inches): | 68" |
| Weight (lbs): | 167 lbs |
| Warranty: | 6 Year Tank/6 Year Parts Limited |

The manufacturer does not recommend going further than their recommended venting distance. They do not offer any kits to extend this distance. Please refer to page 13 of the user guide for complete venting instructions.
No, it does not require an external power source.
we are not provided with that info, you can try calling AO Smith directly.
Please refer to the Installation Guide at the link below, starting on page 13. http://s3.pexsupply.com/manuals/1277918330238/33771_PROD_FILE.pdf
You can, provided that there is adequate indoor combustion air.
Yes, it is.
According to the manufacturer, The GDV-40 series 100 is still available.