Gas water heater venting

How to Install a Power-Vented Water Heater
January 16, 2016 – 04:29 pm

Power-vented water heater

Power-vented water heaters work the same as ordinary water heaters, but the exhaust gases are blown out with a small fan instead of rising upwards through metal pipes.

Natural-draft water heater

The hot exhaust gases from a natural-draft water heater rise through an open draft diverter and out through a metal duct.

Natural gas or propane hot water heaters are generally less expensive to operate than electric heaters, but installing a standard vent in a house without an existing chimney is expensive.

It’s easier to run the vent if you install a “power-vented” type of natural gas (or propane) water heater. This type of venting system is different from what you see on most gas water heaters. Most have a “natural-draft” type of vent, where the hot waste gases rise through an open draft diverter and into metal pipes,
which eventually lead to the outdoors. Running one of these vents is complicated and may be expensive. It’s best left to a professional.

In contrast, a power-vented type relies on a fan to blow the exhaust gases out. Since this method doesn’t rely on the natural buoyancy of hot air, the vent pipes don’t have to go upward. They can go out horizontally, which usually makes them much easier to install. Further, the fan dilutes the exhaust with cooler air so you can run the vents with easy-to-assemble PVC pipe. Power venting is an especially good solution for more energy efficient, tightly built homes, where a good natural draft is difficult to establish.

However, you should be aware of several drawbacks:

  1. You may notice the sound of the fan. Ideally the water heater will be in a room away from the main living area so it doesn’t become bothersome.
  2. You have to provide a standard electrical receptacle near the unit to supply power for the fan.
  3. You have to make sure you have adequate “make-up” air to replace the air being blown out.
  4. And finally, power-vented water heaters cost at least 50 percent more than a natural-draft water heater. You can find power-vented water heaters wherever water heaters are sold; almost every major water heater manufacturer makes them.
Source: www.familyhandyman.com
You might also like
Garage heater
Garage heater
WATER HEATER REPLACEMENT - 50 GALLON GAS POWERVENT WATER
WATER HEATER REPLACEMENT - 50 GALLON GAS POWERVENT WATER ...
BrassCraft Mfg BrassCraft PSC1095X L Safety Plus Gas and Water Install Kit for Water Heaters
Home Improvement (BrassCraft Mfg)
  • Includes 1/2In. OD x 18In. corrugated stainless steel gas connector w/ProCoat coating to withstand prolonged exposure to harsh household chemicals
  • Safety+PLUS Excess Flow Valve protects against gas fires and explosions- 1/2 In. MIP (with 3/8 In. FIP Tap) connection to gas supply or gas ball valve
  • Includes multiple steel gas fittings to fit most gas appliance inlets - (1) 1/2 In. MIP (with 3/8 In. FIP Tap) fitting and (1) 1/2 In. FIP fitting
  • Includes (2) 3/4In. MIP x3/4In. FIP x15In. braided war heater connectors; 3/4In. Nom. Comp war connector adapters included for copper piping systems
  • Connects directly to war heater. Approved for indoor and outdoor use; Temperature rating: -32 Degree to 150 Degree F. CSA certified
Rinnai Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater, Concentric/Twin Pipe Installation
Home Improvement (Rinnai)
  • Concentric or PVC venting option
  • Up to .96 Energy Factor
  • The space-saving design allows installation almost anywhere
  • Ultra low NOx emissions
  • 199, max BTU
B-Home Direct Vent Gas Water Heater Inspections
B-Home Direct Vent Gas Water Heater Inspections
Hot Water Heaters : How to Properly Vent a Gas Water Heater
Hot Water Heaters : How to Properly Vent a Gas Water Heater
Rinnai Rinnai RUR98iN 9.8 Max GPM Ultra Series Condensing Indoor Natural Gas Tankless Water Heater with Recirculation
Home Improvement (Rinnai)
  • Innovative technology provides an endless supply of hot water
  • Recirculation capability, with or without a dedicated recirculation line Innovative technology provides an endless supply of hot water
  • Offers both Concentric and PVC, providing more venting options right out of the box
  • Rinnai s condensing technology features dual heat exchangers to provide maximum efficiency, up to .96 Energy Factor
  • Maximum output, minimum space. About the size of a small suitcase
Z-Flex Z-Flex Z-Vent 4" Universal Appliance Adaptor with Back-Flow Preventer (2ZVB04)
Home Improvement (Z-Flex)
  • 4 Universal Appliance Adaptor with Back-Flow Preventer
  • For Takagi, Paloma, Rheem, Noritz tankless water heaters
  • This Universal Adaptor has seals on both ends and has a back-flow preventer built in
  • Useful in colder climates to prevent cold air from flowing back into your heat exchanger
  • Universal adaptor connects tankless water heater to the 4 Z-Flex Z-Vent Stainless Steel Venting
Noritz Noritz NR981-SV-LP Indoor/Outdoor Tankless Water Heater 9.8 Gpm Designed for 4-Inch Single Wall, Class Iii Venting, Liquid Propane
Home Improvement (Noritz)
  • Endless hot water
  • High flow rate
  • High Efficiency
  • Low Nox design
Popular Q&A
avatar
Gas water heater venting out the chimney...? | Yahoo Answers

OK, we have a gas water heater which is vented out our chimney. We built on a second story which is unfinished, and when this was done they covered up the top of the chimney. I knew when we did this it would cause an issue. Its made the chimey sweat constantly, and the dehumidifier does nothing. We haven no...

Related Posts