So, is this model lp (as shown in title) or nat gas (as shown in description)? i need lp.

The Bosch C950ES LP is for Liquid Propane and the Bosch ProTL 199L is for Liquid propane also. There must be an error in the description but these are liquid propane units. Globaltowne is an Authorized Bosch Distributor.

does this unit require 115v ?

Yes, the Bosch Greentherm C950ES LP has electronic ignition and requires to be plugged into a regular 110V outlet. GlobalTowne is a Bosch Authorized Distributor.

All of these Greentherm models come with automated, fully modulating bypass. What is automated, fully modulating bypass?

The Bosch C950ES LP has a modulating bypass that mixes water in the unit to keep a more consistent temperature. GlobalTowne is an Authorized Bosch Distributor.

Brand	Bosch Thermotechnology
Special Feature	Max flow rate of 9.2 GPM at 35 degrees rise
Color	Gray
Voltage	120 Volts (AC)
Maximum Flow Rate	9.3 Gallons Per Minute
Efficiency	0.93
Mounting Type	Wall
Is Electric	No
Manufacturer	Bosch
UPC	052575110424
Global Trade Identification Number	00052575110424
Part Number	Greentherm C 950 ES LP
Item Weight	74 pounds
Product Dimensions	11.25 x 17.87 x 30.5 inches
Item model number	C 950 ES LP
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Certification	Energy Star
Special Features	Max flow rate of 9.2 GPM at 35 degrees rise
Batteries Included?	No
Batteries Required?	No
Warranty Description	3 - 15 Years depending on application

Bosch C 950 ES LP Greentherm Tankless Water Heater, Propane

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