Z-Flex Z-Dens 2" Concentric Horizontal & Vertical Vent Kits

Global Protankless Supply is now carrying the Z-Flex Z-Dens 2" Concentric Horizontal Kit (2ZDHK2) and also the Z-Dens 2" Concentric Vertical Kit (2ZDVK2).  The concentric horizontal and vertical vent kits are ULC-S636 listed polypropylene gas venting systems suitable for venting positive or negative pressure residential and commercial gas and oil fired Category II and IV condensing heating appliances with a maximum continuous flue gas temperature of 248°F (120°C).

There are several distinct advantages with the Z-Dens Concentric horizontal and vertical vent kits. This polypropylene piping is long lasting and easy to install as no cure time is required. Acidic flue gas condensate resistance provides a means of reducing boiler contamination. Lastly, in the event of expansion and contraction of the venting run, the Z-Flex Z-Dens venting eliminates the inherent dangers found with PVC/CPVC glued pipe joints.

Z-Flex Z-Dens 2" Concentric Horizontal Kit (2ZDHK2)

The Z-Flex Z-Dens 2" Concentric Horizontal Kit 2ZDHK2 comes with a concentric termination horizontal, adaptor collinear to concentric, 2 locking clamps & 2 Adaptors CPVC / PVC Coupling to PP.

Z-Flex Z-Dens 2" Concentric Vertical Kit (2ZDVK2)

The Z-Flex Z-Dens 2" Concentric Vertical Kit 2ZDVK2 comes with a concentric termination vertical, adaptor collinear to concentric, 2 locking clamps & 2 Adaptors CPVC / PVC Coupling to PP.

Global Protankless Supply also offer 2"/4" concentric venting straight pieces and elbows for additional vent length run.

The Z-Flex Z-Dens 2"/4" horizontal and vertical vent kits work well with the New Bosch Greentherm 9000 series gas tankless water heaters.  Please see the models listed below that work for the venting kits.

Bosch Greentherm T9900SEi 199
Bosch Greentherm T9900SE 199
Bosch Greentherm T9900SE 160
Bosch Greentherm T9800SE 199
Bosch Greentherm T9800SE 160

The Z-Dens 2"/4" Concentric Horizontal Vent Kit (2ZDHK2) is also available in 3"/4" (2ZDHK3) and 4"/6" (2ZDHK4).

The Z-Dens 2"/4" Concentric Vertical Vent Kit (2ZDVK2) is also available in 3"/4" (2ZDVK3) and 4"/6" (2ZDVK4).

For further questions please call Global Protankless Supply at 866-289-4652

New Greentherm PP Concentric up and out vent kit

New for the Bosch Greentherm C 950 ES & C 1050 ES is the polypropylene concentric up-and-out venting kit consisting of the appliance adapter, a 90° elbow, and a termination. This is the simplest and quickest venting option possible for a condensing tankless unit. The outer metal pipe and the inner polypropylene pipe make it both lightweight and rigid. The termination is telescopic to allow for varying wall thicknesses.

This new PP concentric up and out vent kit is approved for the New Green Therm C950ES & C1050ES tankless water heaters.  The PP concentric up and out vent kit is also approved for the Bosch Therm C950ES & C1050ES.  

Before attaching the appliance adapter to the top of the heater, a second metal plate comes with the kit and would cover the other intake air hole.  Then you would want to remove the exhaust collar from the top middle of the heater and then attach the appliance adapter as this will enable the heater to exhaust to the outside and also take its combustion air down the outer side of the same hole.

Bosch Greentherm PP concentric up and out vent kit (7738003210)

The Greentherm models C 950 ES & C1050ES are also approved for PP twin-pipe venting systems. Availability of generic PP vent pipe has increased and systems are becoming more popular due to ease of installation.  The twin pipe installation would be used if the customer needed to go out a different area out the sidewall or through the roof and would need to take the combustion air from the outside also.



PP Common Venting Systems for Cascaded Units

New for the Greentherm C 950 ES and C 1050 ES, and the Therm C 1210 ES and C 1210 ESC, is a common venting system of polypropylene pipe for up to four appliances. Offered in either a side by side or back to back configuration, the kits allow for a single vent pipe for all units. Combustion air must be taken from the room for multiple units common vented.  A 3" PVC 90 degree elbow would want to be placed on either the left or right air intake hole for the combustion air to keep anything from falling into the heater.  This is mandatory for commercial applications, with multiple units installed and that the multiple units are common vented with either the side by side or back to back venting option.  All other applications such as residential, single units, etc. must take the combustion air from the outside using 3" PVC or 3" dia PP pipe.  Please refer to the installation manual for the Bosch tankless water heater for the combustion air requirements for the heater. 

Side by side with horizontal termination (left),

back to back with vertical termination (right)



The new polypropylene pipe (PP) common venting system features different kits for cascaded units of 2, 3 or 4 units.  Kits would have to be ordered as needed:

Kit A - side by side, units #1 & #2 (2 heaters) (7736501100)

Kit B - side by side, units #3 & #4 (1 heater) (7736501254)

Kit C - back to back, units #1 & #2 (2 heaters) (7736501253)

Kit D - Extension back to back, units #3 & #4 (2 heaters) (7736501252)

There are also additional 6" diameter PP venting pieces available.  There are additional:

Horizontal Termination Dia 6"  (7736501117)

Vertical Termination Dia 6"  (7736501119)

Extension rigid straight pipe 20" Dia 6"  (7736501137)

Extension rigid straight pipe 40" Dia 6"  (7736501135)

Extension rigid straight pipe 80" Dia 6"  (7736501133)

Rigid 90 degree elbow Dia 6"  (7736501132)

For example:

Say you were common venting and cascading 4 units side by side and venting up through the roof then you would want 1 - Kit A for units #1 & #2, 1 - Kit B for unit #3 and then 1 - Kit B for unit #4.  You would also then need 1 - 90 degree elbow, how many extra feet of extension straight pipe and then the vertical termination.