Combi Boilers

Bosch Space Heating & DHW Greenstar Combi Pro

The Greenstar Combi Pro boilers have the same superior features found in our standard Greenstar Combi boilers, with the auxiliary accessories removed. These combi boilers provide both space heating and domestic hot water, while maintaining AFUE efficiencies of 95.0%. With domestic hot water flow rates up to 4.0 GPM (72° ΔT) and a variety of different venting options, these combi boilers are the preferred choice for apartment and home-owners alike.

Limited lifetime heat exchanger and 5-year parts & 1-year labor warranty (*for registered products)
All models available as NG or LP (Field convertible)
Special insulation ensures ultra-quiet operation
Compact dimensions and built-in frost protection offer flexibility for location of installation
ECO mode for energy saving fuel consumption
Exclusive safety feature - keypad safety lock prevents unwanted tampering with heating controls
Eligible for Tax Credit where offered.

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Navien Combi

Navien NCB-E is the first high efficiency condensing combination boiler with the capacity to supply both heat and domestic hot water for larger homes — enough hydronic heat for a whole house, plus hot water to run two showers and a dishwasher all at the same time.

The Navien NCB-E saves installation time and reduces call backs. In addition, the NCB-E takes up 80% less space than a traditional floor standing boiler and tank water heater. Your customer now has more room, saves energy and enjoys all the hot water they need, whenever they want it.

Dual inputs of up to 120k BTU/H for heating and 199k BTU/H for DHW

Supplies all the heat and domestic hot water that most houses require.
PVC Venting

Low exhaust gas temperatures allows use of PVC, CPVC, ULC S636 and polypropylene vent systems, reducing installation time and costs. System can use 2" venting for up to 60', or up to 150' with 3" venting.
4.5 GPM@77° temperature rise for domestic hot water

Separate stainless steel flat plate heat exchanger for DHW creates the highest flow rate for any combi boiler in the industry.
Low gas pressure operation

Our negative pressure gas valve ensures maximum performance all the way down to a minimum gas pressure of 3.5" of water column.
Turn down ratio of 6:1 for heating and 11:1 for DHW

The sophisticated gas flow control system provides a high turn down ratio, reducing energy waste and excessive boiler cycling and enhances temperature control for DHW.
Uses existing ½" gas piping

Save time and effort in retrofit applications with ½" gas lines for up to 24'.
Dual stainless steel heat exchangers

Resist corrosion better than copper to provide longer life.
Space saving design

Occupies 80% less space than a traditional floor standing boiler and storage tank.
Field gas convertibility

Dual venturi system allows for easy field convertibility from NG to LP operation. Orifice for LP conversion included.
Linkability

For extraordinarily largedomestic hot water flow demand, the NCB-E can be cascaded with our NPE units.

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Combi Boilers

Bosch Space Heating & DHW Greenstar Combi Pro

Navien Combi

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