Viessmann Heat Pump Review

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Viessmann Heat Pump

Viessmann Heat Pumps In Brief:

Viessmann launched their first air source heat pump in 1978 as part of their continued efforts to help with the ongoing energy crisis that was evident at the time. The German company has only gone on to further their efforts as the world endeavours to become more environmentally friendly in recent years. Perhaps the most notable achievement is their Efficiency Plus campaign which aims to reduce the company’s carbon footprint. In addition, the manufacturer has continued its development of renewable energy systems like heat pumps to help others become more carbon conscious too. 

Viessmann Company Overview:

First established in 1917, Viessman, a German company, was founded by Johann Viessmann in Hof an der Saale. The manufacturer specialises in heating and refrigeration systems, and have been at the forefront of technology changes for many decades.

The German company first expanded into the solar energy sector in 1976, and as we have previously mentioned they also launched their first air source heat pumps in 1978. Since then, they have only continued to expand further into the renewable energy sector.

Pros And Cons Of Air Source Heat Pumps

While energy costs continue to spiral, with the addition of the fight against climate change, there are plenty of motivators that are convincing UK households to purchase renewable energy systems. Whether it be solar panels, insulation, or a heat pump, there are plenty of benefits and drawbacks to the new ‘green’ energy solutions that are available on the market – and all of these must be considered before you dive into purchasing any Viessmann heat pump.

Advantages Of Heat Pumps

  • A heating And Cooling Device: Air source heat pumps have a dual purpose as they are able to both heat and cool your home. Not only will the technology work to maintain a high temperature inside your home during the winter months, but it will also keep your home cooler during the summer. Throughout the year, a heat pump will ensure your house is as comfortable as possible.  
  • Reduce Your Carbon Footprint: Unlike traditional central heating systems and combi boilers, an air source heat pump does not require the burning of fossil fuels in order to work. Instead, an air pump works by extracting the heat from outside your home and bringing it inside, making it a renewable energy source that is vastly more environmentally friendly than the alternative.
  • Low Maintenance Alternative: Heat pumps are also extremely low maintenance. The only tasks you will need to complete to ensure the system is working effectively is to keep the system clean and ensure it does not get damaged, and to then get rid of any obstructions that may arise that will prevent the system from taking in air to extract heat as effectively.

Disadvantages Of Heat Pumps

  • High Initial Costs: Heat pumps, like other alternative heating solutions, require a high initial investment. However, heat pumps also require electricity in order to work, which can be more expensive compared to traditional gas boilers. The significantly higher efficiency level that comes with heat pumps, however, (usually 300% or more) means that you may only see a marginal increase when it comes to air source heat pump running costs, and in most cases you’ll actually be making a saving each month compared to your older heating system. 
  • Your Property May Not Be Suitable: Heat pumps have a large amount of equipment required in order to work currently, which in turn requires a lot of space. Outside you will require room for the heat pump itself, whereas inside you will need to make room for a hot water cylinder.
  • Potential Unforeseen Costs: In order to get the most out of your heat pump, you will need to ensure that your property has large radiators and/or underfloor heating. Otherwise your home may not get heated to your desire without them.
  • Receiving Planning Permission Can Be Difficult: Finally, in order to install an air source heat pump on your property, you may need to access planning permission before installation can commence. This can be difficult to achieve, especially if you reside in a listed property or within a conservation area.

Viessmann Heat Pump Specifications

Viessmann has continued to strengthen its position as a market leader in the production of air source heat pumps since it launched its first over 40 years ago. The German company’s Vitocal range has become one of the most highly rated varieties available on the market in recent years. There are three ranges available with various models under each section, these ranges are known as:

Each of Viessmann’s heat pumps come with a two year warranty as standard. However, upon registering your new heat pump you will be able to access an extended warranty period. Any registration processes must be completed within 30 days of having your heat pump installed.

Viessmann Heat Pump Product Ranges

Viessmann Offices

Vitocal 150-A

One of the most environmentally friendly heat pumps available on the market, the Vitocal 150-A utilises refrigerant R290 (propane) which is considered to be very environmentally friendly. Propane is also considered to be cost effective, which will allow your household to make further savings. Additionally, the Vitocal 150-A has a low noise pollution rating, which is ideal for those that are worried about the additional noise a heat pump may bring.

  • Maximum Flow Temperature: -10°C to 70°C.
  • Efficiency Rating: A+++.
Vitocal 150-A 150-A04 230 to 150-A08 230
150-A04 230150-A06 230150-A08 230
Nominal Heat Output
Operating point A7/W35 kW4.04.85.6
Operating point A-7/W35 kW3.85.66.5
Cooling Capacity Max kW4.05.06.0
Sound Power Level dB(A)515151
Energy Efficiency %
At W35185180175
At W55140141137
Weight kg
Indoor Unit474747
Outdoor Unit162162162
Dimension (LxWxH) mm
Indoor Unit360 x 450 x 920360 x 450 x 920360 x 450 x 920
Outdoor Unit600 x 1144 x 841 600 x 1144 x 841 600 x 1144 x 841 

Vitocal 151-A

Building upon the environmentally friendly, low noise production, and cost effective nature of the Vitocal 150-A system, the 151-A variant offers higher power capabilities (as seen in the table below). However, offsetting the power benefits, the 151-A has a slightly higher sound power level and a reduced maximum flow temperature operating window. Additionally, both indoor and outdoors units are marginally bigger, meaning they will require more space within your property. But the greater performance you’ll notice may well be worth the compromises necessary to install the heat pump. 

  • Maximum Flow Temperature: -10°C to 60°C.
  • Efficiency Rating: A+++.
Vitocal 151-A 151.A10 SP 230 to 151.A16 SP 230
151.A10 SP 230151.A13 SP 230151.A16 SP 230
Nominal Heat Output
Operating point A7/W35 kW7.38.19.1
Operating point A-7/W35 kW9.711.112.4
Cooling Capacity Max kW14.415.717.0
Sound Power Level dB(A)565656
Energy Efficiency %
At W35190178178
At W55145141141
Weight kg
Indoor Unit170170170
Outdoor Unit191191191
Dimension (LxWxH) mm
Indoor Unit597 x 600 x 1900597 x 600 x 1900597 x 600 x 1900
Outdoor Unit600 x 1144 x 1382600 x 1144 x 1382600 x 1144 x 1382

Vitocal 200-A

The final Viessmann heat pump system we will look at is the 200-A variant. Not only is this system considered powerful, energy efficient, and environmentally friendly, but the monobloc design of the 200-A ensures that it does not take up too much room when installed. However, this Viessmann model is not the cheapest available on the market and is not the most suitable addition for homes that are located in colder climates.

  • Maximum Flow Temperature: -10°C to 70°C.
  • Efficiency Rating: A+++ to A++.
Vitocal 200-A 201.A04 to 201.A08
Heat Performance
Operating point A7/W35 kW4.04.85.6
Operating point A-7/W35 kW3.85.66.7
Rated Cooling Capacity kW4.54.95.4
Sound Power Level dB(A)353535
Energy Efficiency Ratio (EER)
Weight kg
Indoor Unit102102103
Outdoor Unit40-4140-4140-41
Dimension (LxWxH) mm
Indoor Unit370 x 450 x 880370 x 450 x 880370 x 450 x 880
Outdoor Unit546 x 1109 x 753546 x 1109 x 753546 x 1109 x 753

Viessmann Heat Pumps FAQs

Q: Do Heat Pumps Produce A Lot Of Noise?

A: If you are worried that purchasing a heat pump will cause an increase in noise pollution for your household and any potential neighbours, you will be happy to hear that you would be mistaken. One of the most common misconceptions of heat pumps is that they are loud whilst they are running.

However, they are not much more noticeable than a background hum. In fact, many heat pumps can produce as low as 40 decibels of noise. There are three main contributors that impact the level of noise an air pump can make. These are:

  • The acoustic environment where your heat pump has been installed.
  • The quality of the system.
  • The running conditions of your air pump.

Q: Can I Get Financial Help To Purchase An Air Source Heat Pump?

A: There are two main schemes available that can help with the financial burden of purchasing an air source heat pump. 

The first being the Boiler Upgrade Scheme (BUS), which is available to households in England and Wales. If you have an Energy Performance Certificate (EPC) rating and up to date insulation, then you will be able to apply for up to £7,500 to help pay for the cost and installation of either an air source heat pump or a ground source heat pump. 

Alternatively, if you live in Scotland, then the Home Energy Scotland scheme may be able to help you.

Viessmann Heat Pumps Review Summary

With over 40 years of experience developing and manufacturing air source heat pumps for residential usage, Viessmann has been able to perfect the process of creating energy efficient, cost effective, and powerful renewable energy heating systems. 

Depending on your household’s power requirements, budget, and available space (both indoors and outdoors), the German manufacturer will have an air source heat pump that will fulfil your needs. There current heat pump range includes the following models:

  • Vitocal 150-A.
  • Vitocal 151-A.
  • Vitocal 200-A.

If you are questioning which heat pump is the best option for your household, then why not get in touch with our heat pump specialists? They will be able to answer any questions you may still have, and help you find the perfect heat pump installers with the best reputations in your local area. 

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Ollie Creevy
Ollie has been writing content online about home improvements for over 3 years. With a real interest and in-depth knowledge of heat pumps and ECO home improvement measures you can use to save on your energy bills. Ollie also keeps up to date with all the Government grants available for you to take advantage of like ECO4 and the Boiler Upgrade Scheme.