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Boiler Viessmann Vitocrossal 300 CU3A Series Capacity 199,000 BTU

  • Rating
  • Capacity 199000
  • AFUE 95%
  • Fuel Type Propane, Natural Gas
  • Energy Star Yes
  • Collection Vitocrossal 300
  • Warranty Up to 10 years on parts
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The comprehensive product range from Viessmann

Viessmann’s comprehensive range offers individual solutions and efficient systems for many application areas. This includes a complete line of high-efficiency oil and gas-fired boilers, solar thermal systems, and control technology.

Whether the project is new construction or retrofit, single-family home, or district heating networks, Viessmann has an ideal heating solution. From individual system components to fully integrated systems – all products are future-proof and economical.


Viessmann offers a comprehensive range of home comfort products that sets the standards for sustainability and efficiency. The Vitocrossal 300 is Viessmann’s top-of-the-line boiler for residential and light commercial applications. The Vitocrossal 300 is known for its high-temperature heating and water volume, all while maintaining an impressive 95% AFUE rating. Perfect for homes with multi-zone or high mass radiators, the Vitocrossal 300 features wide water passageways that allow for simplified piping with full system flow. An intelligent combustion control along with a user-friendly Vitotronic 200 control makes the Vitocrossal 300 a favourite among owners looking for power and efficiency.

The Viessmann Vitocrossal 300 features a unique heat exchanger that provides space for a large amount of water. This allows the boiler to efficiently serve high-demand space heating sources, such as high-temperature fin-tube and high mass radiators.

The Vitocrossal 300 includes an Inox-Crossal heat exchanger that offers ideal conditions for intensive utilization of hot gases. The vertical orientation of the heat exchanger allows condensate to run off downwards, creating a self-cleaning effect.

The Viessmann-made Vitotronic 200, KW6B control manages the entire heating system and ensures maximum performance and comfort at all times. This user-friendly control features a backlit display, multi-line text, and graphics for the hassle-free boiler control.

The Vitotronic 200 control includes an outdoor reset mode that can reduce fuel consumption by up to 15%. The outdoor reset adapts the boiler’s operating temperature to the changing outdoor temperature, allowing for excellent returns on an initial investment.

Equipped with the state-of-the-art Lambda Pro combustion management system, the Vitocrossal 300 adapts combustion to changing gas qualities and operating conditions to optimize performance and efficiency.


  • Model Vitocrossal 300
  • Boiler Type Gas
  • Depth 31-1/2 in
  • Input MBH 199 MBH
  • Energy Star Yes
  • NSF Certified No
  • Supply Pipe Connection 1-1/4 in
  • ANSI Specifications ANSI Z21.13
  • BTU 199000
  • CSA Certified CSA 4.9, CSA B51, CSA C22.1
  • Energy Star Compliant Yes
  • Height 61-1/2 in
  • Length 31-1/2 in
  • Power Source Gas
  • UL Listed No
  • BTU Heat Rating 185000 Btu/h
  • Fuel Type Propane, Natural Gas
  • Ignition System Gas Fired
  • Maximum Pressure 30 psig
  • Return Pipe Connection 1-1/4 in
  • Width 26 in
Boiler Viessmann Vitocrossal 300 CU3A Series Capacity 199,000 BTU
 Boiler Viessmann Vitocrossal 300 CU3A Series Capacity 199,000 BTU
*Product With Installation


How do I choose the right size of central AC for my home?
Various factors need to be considered such as
• Specific region and climate in which you live
• Orientation of your home (for example, if it faces west)
• Size and age of your windows
• Your home’s ventilation system and ductwork
• Quality and quantity of your home’s insulation
• Age of your home
How does a new high efficiency AC will help me save energy bills?
Choose ENERGY STAR® certified ACs
ENERGY STAR certified central air conditioners have higher seasonal energy efficiency ratio (SEER) ratings and use less energy than conventional new models*. Our experts can help you choose an ENERGY STAR certified AC that’s right for your needs. Schedule a no-obligation, in-home consultation with a Home Comfort Advisor today.
How long does an installation take? What time will they arrive? Do I need to be home for the installation?
Every installation is different, and every project presents unique installation challenges, but we aim to have all installations completed in one day. Technicians will arrive at the prearranged agreed upon time and will keep you updated on the progress throughout the day. We always recommend that homeowners are present during installation, but if that’s not possible, we require someone over the age of 18 to be home during installation.
Can I buy it online and install by myself?
HVAC or Boiler installation requires electrical, gas and refrigerant knowledge as well as familiarity with local bylaws and building codes. Failure to properly install HVAC equipment can create safety concerns and performance issues as well as void manufacturer warranties. For those reasons, we always recommends professional installation.
What Are Maintenance Needs of the Air Conditioner?
Scheduling preventive maintenance is essential if you want to protect your investment in your air conditioner. Routine basic maintenance helps prevent problems from occurring and extends the life of your air conditioning unit.
Along with your air conditioning installation, ask about the preventative maintenance service of your contractor. What is included, and what is the cost?
When Can You Install My New Air Conditioner?
There’s just one more thing to do. You should consider the best time to install your new air conditioner.
If you have an existing air conditioner that is not working and summer is approaching then you may want to get this done soon. Even if you have a functioning air conditioner, the installation process will mean you will be without air conditioning for at least some time. There will also be some disruption in your home while work is completed.
Discuss your preferred installation timescale with your home comfort advisor. They will explain the process and work with you to keep disruption to a minimum.

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