John Wood Power Vent Review

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

The 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.

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 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 PVC, CPVC or PP.

  • FVIR compatible water heaters utilize the air intake snorkel system which prevents the flammable vapors from paint, gasoline.. 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.

Model selection

Standard Type

John Wood Power Vent Model

Models
---
Specs
JW840NVH
-ES-02
JW840NVH
-ES-04
JW850NVH
-ES-02
JW850NVH
-ES-04
JW85065SNV
-ES-02
Capacity (Gal) 40 40 50 50 50
Gas Input
(BTUs)
33,000 30,000 38,000 34,000 65,000
FHR
(GPH)
72 69 88 87 110
Energy Factor
EF
0.64 0.62 0.62 0.62 0.62
Recovery rate
(GPH)
30 28 35 31 60
Max. vent length
(inch)
80 80 80 80 50
Side
connect.
NO NO NO NO YES
Weight
(Lb
155 187 200 200 202

Models
---
Specs
JW85065SNV
-ES-04
JW85065LNV
-ES-02
JW860NVH
-ES-02
JW860NVH
-ES-04
Capacity (Gal) 50 50 60 60
Gas Input
(BTUs)
58,500 62,000 42,000 38,000
FHR
(GPH)
104 104 106 101
Energy Factor
EF
0.62 0.62 0.62 0.62
Recovery rate
(GPH)
54 57 39 35
Max. vent length
(inch)
50 65 80 80
Side
connect.
YES YES NO NO
Weight
(Lb
200 200 202 202

emergency plumber

Energy Star Models

Models
---
Specs
JW840S40N
-PV-ES2
JW840T50N
-PV-ES2
JW850S40N
-PV-ES2
JW850T50N
-PV-ES2
Capacity (Gal) 40 40 50 50
Gas Input
(BTUs)
40,000 52,000 40,000 50,000
FHR
(GPH)
73 90 90 96
Energy Factor
EF
0.70 0.70 0.70 0.70
Recovery rate
(GPH)
40 50 40 50
Max. vent length
(inch)
50 125 125 180
Side
connect.
NO NO NO NO
Weight
(Lb
174 176 198 192

Models
---
Specs
JW850S62N
-PV-ES2
JW860S42N
-PV-ES2
JW875T72N
-PV-ES2
Capacity (Gal) 50 60 75
Gas Input
(BTUs)
62,000 42,000 72,000
FHR
(GPH)
110 106 155
Energy Factor
EF
0.70 0.70 0.68
Recovery rate
(GPH)
62 42 72
Max. vent length
(inch)
50 180 125
Side
connect.
YES NO
YES
Weight
(Lb
212 216 277


EnviroSense Power Vent

John Wood EnvirosenseJohn 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 high thermal efficiency of90%. Other great advantages are the 76,000 gas burner that is capable to deliver over 3 gallons of hot water in the continuous flow, 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 and energy saving hot surface ignition, the diffuser dip tube for reduced lime and sediment build-up, and also two commercial grade anodes for rust protection.

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


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(The pictures are courtesy of John Wood website)

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