John Wood Power Vent Review and Buying Tips

John Wood power vent water heater

John Wood power vent water heaters are designed for homeowners that prefer options when installing the unit and its venting system. This type of heaters is using an external power supply to power its elements, such as the electric blower, which further forces the exhaust gases out and moves the combustion air inside the combustion chamber.

Benefits

Power vs. Direct Vent

The power vent design allows John Wood water heaters to use vent pipes up to 100 ft. in length, horizontally or vertically, and installed in the garage, basement, even the closets. As opposed to the direct vent models, power venting with its long-run pipes doesn't require the proximity of the external wall, just because of its electric blower and longer pipes.

High Efficiency

The power venting brings more flexibility to its owners, but when combined with the heat traps and thicker foam insulation it significantly increases the efficiency of the water heater and ensuring the reliable operation.

Variety

John Wood power vent water heaters are available in many sizes and gas outputs, which makes them perfect for residential homes, from small to large hot water demands. Based on the efficiency and features these units offer, three groups are found:

  • Standard type
  • Energy Star
  • EnviroSense

Features review

  • Power venting design uses the electric blower and coaxial or two-pipe system, with the vent pipes made of cheaper PVC, CPVC or PP for added flexibility.
  • FVIR compatible water heaters utilize the air intake snorkel system which prevents the flammable vapors from paint, gasoline and other to enter the gas combustion chamber.
  • Sealed gas combustion chamber increases the safety.
  • The advanced gas control valve features the self-diagnostic system which makes troubleshooting simpler.
  • Gas water heaters with the side connection are used for potable water and space heating.
  • Natural gas and propane gas models available.
  • Heavy duty anode rod for protection against corrosion.
  • 3-position rotatable blower for added flexibility - found on Energy Star models.
  • Warranty - 8 years.

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Specs

Standard type

Model/
Features
Capacity
Gallons

Power
BTU
First
Hour
Rate
GPH
Energy
Factor
EF
Recov.
GPH
Vent
length
inch
Weight
lbs
Side
connect.
JW840NVH-ES-02 40 33,000 72 0.64 30 80 155 NO
JW840NVH-ES-04 40 30,000 69 0.62 28 80 187 NO
JW850NVH-ES-02 50 38,000 88 0.62 35 80 200 NO
JW850NVH-ES-04 50 34,000 87 0.62 31 80 200 NO
JW85065SNV-ES-02 50 65,000 110 0.62 60 50 202 YES

Model/
Features
Capacity
Gallons

Power
BTU
First
Hour
Rate
GPH
Energy
Factor
EF
Recov.
GPH
Vent
length
inch
Weight
lbs
Side
connect.
JW85065SNV-ES-04 50 58,500 104 0.62 54 50 200 YES
JW85065LNV-ES-02 50 62,000 104 0.62 57 65 200 YES
JW860NVH-ES-02 60 42,000 106 0.62 39 80 202 NO
JW860NVH-ES-04 60 38,000 101 0.62 35 80 200 NO

Energy Star models

Model/
Features
Capacity
Gallons

Power
BTU
First
Hour
Rate
GPH
Energy
Factor
EF
Recov.
GPH
Vent
length
inch
Weight
lbs
Side
connect.
JW840S40N-PV-ES2 40 40,000 73 0.70 40 50 174 NO
JW840T50N-PV-ES2 40 52,000 90 0.70 50 125 176 NO
JW850S40N-PV-ES2 50 40,000 90 0.70 40 125 198 NO
JW850T50N-PV-ES2 50 50,000 96 0.70 50 180 192 NO

EnviroSense Power Vent

John Wood power vent water heaters from EnviroSense group are known as condensing tank-type models with the 50-gallons capacity only, that are equipped with the helical type heat exchanger. The spiral shape is what increases the contact surface between the heat on one side of the pipe and water on the other, resulting in the high thermal efficiency of 90%. Other great advantages are the 76,000 BTU gas burner that is capable to deliver over 3 gallons of hot water in the continuous flow, the high recovery rate of 92 gallons, FHR of 127 gallons and reduced energy consumption.

Side connections allow recirculation for faster delivery of hot water, as well as combination heating of home space and potable water. The long venting pipes (max is 128) offer greater flexibility.

As opposed to all above heaters, EnviroSense utilizes the reliable, long-lasting and energy-saving hot surface ignition, the diffuser dip tube for reduced lime and sediment build-up, and also two commercial grade anodes for even better rust protection.

On the cons side are the short 6-year warranty and capability to run on natural gas only.

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