Viessmann Vitodens 100 boilers

Homeowners and business owners looking to invest in an energy-efficient, versatile and value-driven boiler that fits any space and budget can find their solution in the Vitodens 100-W product line. Vitodens 100-W is a gas-fired, wall-mounted condensing boiler available in two sizes: 94,000 and 125,000 BTUs. 

Shipped from the factory ready for natural gas (NG) operation, it has the capacity to operate with liquefied petroleum (LP), otherwise known as propane. The newest model, the Combi boiler, provides space heating with on-demand domestic hot water (DHW). The superior utility of these units lies within the streamlined infrastructure.


The underlying structure of the Vitodens 100-W boilers is designed for efficiency, longevity and cost savings. Viessmann developed and manufactured high-quality stainless steel elements using innovative, leading technology that maximizes performance and dependability. The boiler has a fully modulating stainless steel cylinder burner and patented Inox-Radial heat exchanger surface. 

The key to a condensing boiler's optimal efficiency and performance is the height of the heat exchanger. The Viessmann heat exchanger is ideally positioned to produce 95% annual fuel utilization efficiency (AFUE) across all models.

The mechanics of the unit lends itself to easy servicing by a technician. The unit has a backlit menu-driven LCD touch screen and enhanced programming, and is equipped with an outdoor reset control. The wiring is a simple three-point appliance plug. 

With only two screws, the jacket removal is effortless. The design allows for trouble-free purging of the system as part of maintenance. Only two tabs need to be opened to access the controls, circulator pump, gas valve, blower assembly, ignition electrode and ionization signals. The whole burner assembly comes off with four bolts.

Benefits overview

Salient features of each Vitodens 100-W boiler include high efficiency, low-energy combustion, high performance and quiet operation. The self-cleaning property of the stainless steel heat exchanger contributes to the boiler's longevity and reliability. The versatility lies in the multiple venting options and fuel flexibility.

The unit is perfect for limited-space installation. Compact and lightweight, the design accommodates mini-boiler rooms typical of apartments, condos, cottages and small single-family houses. Clear access to pipe connections at the bottom, serviceable parts located in the front, uncomplicated wiring connections and simple programming units render a straightforward install process as well as efficacious servicing and maintenance.

The easy-to-use room thermostat and boiler controls automatically adjust the boiler water to outdoor temperatures. This facilitates product efficiency and creates a physically comfortable indoor environment. The product line is Energy Star-qualified and certified by the Air Conditioning, Heating & Refrigeration Institute (AHRI).

Additional benefits of the Combi boiler

The B1KA Combi boiler conjoins domestic hot water with space heating. It encompasses all the benefits of the 100-W boiler with the added benefit of a built-in DHW tank center. No additional storage tank is needed. The diverting valve and three-speed circulator pump will either drive all the water to the space heating or DHW tank center. The compact size makes it the optimum solution for small mechanical rooms and/or one DHW draw point. The on-demand indirect-fired DHW production makes it an energy-saving and low-cost machine.

For more information, the Veissmann website offers access to product specifications, educational webinars, technical support, contractor partnership rewards and a pro toolbox for industry partners. Homeowners interested in a quote on the system and installation can reach out to a qualified, local licensed heating contractor. Residential customers receive a limited lifetime warranty. Contractors can contact sales representatives for support through the Canadian sales network.

Contact The Boiler Shoppe

Toronto & Area:
1255 The Queensway, Unit 11
Toronto, ON M8Z 1S1
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