Bosch Thermotechnology ZWB42-3
Bosch Thermotechnology ZWB42-3
Hover to zoom
1 Of 5

Bosch Greenstar Combi 151P - 134K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent

Model:

ZWB42-3

Recommended
Write a Review
$2,649.00
Free Shipping
&
Lift Gate
  Learn More About Free Freight
Factory-Direct
Ships in 3-4 Weeks
Factory items ship direct from the manufacturer. Shipping times vary.
synchrony card logo
$47 / Month
With our 86 months 11.99% APR*
86 fixed monthly payments required.
Bosch Greenstar Combi 151P - 134K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Bosch Greenstar Combi 151P - 134K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Model: ZWB42-3
$2,649.00
Accessories
Features
Specifications
Reviews
Product Q&A
How-To Articles
Manuals
Share

Recommended Accessories

eComfort expert image
Expert Recommended Accessories Selected by Bob, our Expert
Required Accessories 9
These accessories are required to properly setup/install this product.
Optional Accessories 10

Features

    The Bosch greenstar boiler represents today's best efficiency technologies brought together in a single package. Astounding efficiency ratings can be achieved with the use of Bosch's condensing technology, squeezing every last BTU out of your home's gas supply. An included 3-speed Grundfos pump and a wide variety of pipe venting options allow the boiler to be installed in nearly any home imaginable. This boiler includes a domestic hot water coil, allowing the boiler to act as a tankless hot water heater as well as a hydronic boiler.
  • Condensing Technology Improves Efficiency
  • The ZWB42-3 is a condensing boiler, using the leftover energy in the boiler's flue exhaust to further heat your home. Keep your home warmer for less energy cost!
  • Included DHW Coil
  • This Bosch greenstar boiler contains an internal domestic hot water coil. This allows the boiler to function as a tankless hot water heater as well as a hydronic water boiler.
  • Fully Modulating Fan
  • The boiler includes a fully modulating fan to control the boiler's burning rate, allowing optimum efficiency to be achieved during a wide variety of outdoor conditions.
  • Small Size and Low Installation Clearances
  • Low installation clearances on all sides, wall mounting configuration, and small footprint translate into a boiler that can be installed almost anywhere.
  • Product Note
    Please note the ZWB42-3 does not include an expansion tank or controller.
California residents see
Warning: This product can expose you to chemicals including Lead which is known to the State of California to cause Developmental Harm.
For more information go to: www.p65Warnings.ca.gov

Specifications

ZWB42-3
specs product image PID-37395
General Information
Product Line
Greenstar
Medium Learn More
Hot Water
Fuel Type Learn More
Natural Gas
Combustion Type Learn More
Condensing
Vent Type Learn More
Direct Vent
DHW Production Learn More
Yes
Modulating/Staging Learn More
Modulating
Mount Type
Wall
Minimum Altitude
0 Feet
Maximum Altitude
4500 Feet
Includes Pump
Yes
Assembly Type
Packaged
Gas Conversion Kit
Included
Performance
AFUE Learn More
95 %
Maximum Input Capacity Learn More
151600 BTU
Minimum Input Capacity
36000 BTU
DOE Heating Capacity Learn More
134400 BTU
Net I=B=R Capacity Learn More
117000 BTU
Ultra Low NOx Emissions Learn More
Yes
Turndown Ratio
5:1
Electrical Data
Phase
1
Frequency
60 Hz
Dimensions
Flue Connection Size
3 Inches
Gas Connection Size
3/4 Inch
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
33 1/2 Inches
Product Width
17 19/48 Inches
Product Depth
13 43/48 Inches
Product Weight
110.2 Pounds
Shipping Weight
118 Pounds
Certifications
Country of Origin
United States
CSA Listed
Yes
ASME Certified
Yes
AHRI Certified
Yes
Warranty Information
Parts Warranty Learn More
5 Years
Heat Exchanger Warranty
Limited Lifetime Years

Reviews

(5)
Bosch Thermotechnology ZWB42-3 Reviews & Ratings

Product Q&A

(2)
Product Questions Answered by Bob, the Heating Product Expert
Can this unit be retrofitted to use propane gas?
John McNew 
from New Mexico 
May 31, 2016
What would be the appropriate pressure setting for the relief valve?
Angie 
from New York 
September 09, 2015

How-To Articles

How to Pick the Perfect Boiler
How to Pick the Perfect Boiler
The boiler is at the heart of every radiated heating system. It's responsible f...
Direct Vent Boiler Options
Direct Vent Boiler Options
There's a no-nonsense beauty in the direct vent boiler for home heating. The di...
Hydronic System Accessory Guide
Hydronic System Accessory Guide
How warm does a coat keep you without gloves and a hat?   Accessories are someti...
eComfort How-To Library
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts

Manuals

 
Media Gallery
Bosch Greenstar Combi 151P - 134K BTU - 95.0% AFUE - Combi Gas Boiler - Direct Vent
Bosch Thermotechnology ZWB42-3
Customer Review Images