Weather Compensation Technology

By taking advantage of Viessmann weather compensation technology, you can save an amazing 15% extra on your fuel bills.

Not only could you be saving money, but carbon emissions too. Which need to be net-zero by 2050, accordingly to the latest government guidelines, so a step in the right direction.

New conventional boilers offer a saving of 35%, with an opportunity to save an additional 15% if you invest in Viessmann’s weather compensating technology with very clever controls.

Technical Information:

So how does it work? In short the weather compensation controls ensure the boiler burns exactly the amount of fuel required to match the heat loss from the building.

A small temperature sensor is located on the outside of the building. This is wired into the internal controls of the boiler and information about the outside temperature is sent to the boiler controller constantly.

When the temperature changes outside the boiler responds and starts to increase or decrease the radiator temperature to compensate. This pro-active mechanism means that people inside the building won’t even notice that the temperature has changed.

So weather compensation controls enable the boiler to respond to outside temperature changes and adjust the radiator output, to maintain a constant temperature indoors.

The diagrams below shows the comparison of a heating system without weather compensation.

This also means the boiler isn’t working to hard, which in turn adds to its life span.

Condensing Effect:

Viessmann weather compensation technology enables the condensing boiler, which already has dramatically increased efficiency, by recovering latent heat in the flue. But also by enabling the boiler to operate at lower temperatures meaning it can condense for longer.

Controls:

The Viessmann Vitodens 200-W weather compensating controls are very sophisticated. Giving a heat curve that can be adjusted to finely tune the household and the type of building construction. These controls also gives you the added benefit of:

  • Night set-back option.
  • Built-in 7 day programmer.
  • Built-in pump logic for optimised pump over-run to reduce power consumption.
  • Morning booster function, it lifts the flow temperature by 20% first thing in the morning to heat the house faster.

Out with the Old

Out with the Old . . and in with the New.

Out with the old and in with the new. Another new Viessmann Vitodens 200-W boiler installed and another happy customer in Abbotts Ann, Andover.

We removed an old boiler and cylinder, as the customer had concerns about storing the water in the loft. For instance the damage the water could cause if it were ever to leak.

Having experienced issues with the the old boiler, our customer from Abbotts Ann, Andover decided it was time for its replacement. So it was out with the old and in with the new!

Technical Information:

We, therefore installed a Viessmann Vitodens 200-W B2KF 26kW combination boiler, complete with horizontal flue and weather compensation. As with all of our installation we carried out a powerflush of the system. Along with the installation of a Spirotech magnetic filter to protect the boiler from debris which appears over time within all heating systems. The Viessmann Vitodens boilers have been voted Which? best buy for the last 4 years. Showing that they are loved by consumer and installer alike.

Weather Compensation:

The Viessmann 200-W is fully weather compensated, which is amazing Viessmann technology giving the boiler the ability to measure the outside temperature and adjust the boiler output accordingly. The weather compensation ensures that the radiators will feel warm, but won’t get very hot and then cool, meaning you have a steady temperature throughout. Meaning huge savings on running costs, which can be up to 15%. Not to mention the importance on being more eco-friendly.

The Viessmann 200-W 26kW combination boiler also delivers 13 litres of water a minute. Which given a standard shower needs 9 litres, gives ample hot water. With the removal of the cylinder the customer also gained more space in the cupboard.

Viessmann offer a 5 year manufacturer parts and labour warranty as standard for complete piece of mind. With options to extend the warranty to 12 years if desired.

We are delighted with the work done by AHS. Their engineers are a pleasure to deal with and took great care to ensure that the installation is as neat as possible. This is the second time that we have used AHS and will certainly use them again in future requirements.

Neil Barrett.
Viessmann Extended Warranty

Viessmann Extended Warranty.

Viessmann have extended their warranty options of their Viessmann Vitodens range of domestic boilers. Giving Viessmann customers the reassurance that if their boiler breaks down we will be there to help. At no extra costs.

As a trained Viessmann installed and valued partner, Alexandra Heating Services, are able to undertake warranty work on behalf of Viessmann and are always happy to help.

Viessmann Vitodens 050-W

Provided with a 7 year standard warranty for Viessmann trained installers, however, new Viessmann extended warranty is now available! So you can now increase the Vitodens 050-W by 3 years. Providing a total 10 year warranty for just £120.00.

Viessmann Vitodens 100-W

Provided with a 5 year standard warranty for Viessmann trained installers, however, new Viessmann extended warranty is now available! So you can now increase the Vitodens 100-W by 3 years, 5 years or a further 7 years. Providing a total 12 year warranty for just £180.00.

Viessmann Vitodens 111-W

Provided with a 5 year standard warranty for Viessmann trained installers, however, new Viessmann extended warranty is now available! So you can now increase the Vitodens 100-W by 3 years, 5 years or a further 7 years. Providing a total 12 year warranty for just £180.00.

Viessmann Vitodens 200-W

Provided with a 7 year standard warranty for Viessmann trained installers, however, new Viessmann manufacturer’s warranty is also now available! So you can now increase the Vitodens 200-W by 5 years or a further 7 years. Providing a total 12 year warranty for just £420.00.

Viessmann Vitodens 222-F

Provided with a 7 year standard warranty for Viessmann trained installers, however, new Viessmann manufacturer’s warranty is also now available! So you can now increase the Vitodens 200-W by 5 years or a further 7 years. Providing a total 12 year warranty for just £420.00.

All prices above are including VAT.

Inox-Radial Stainless Steel Heat Exchanger Winchester

Heat Exchangers: Stainless Steel v’s Aluminium

Stainless steel is the key and here is why. . .

Heating technology should work together to ensure the smooth operation of the entire system – from boiler via burner, control unit and heat exchanger, to deliver the highest possible operational reliability. Today, domestic and commercial boiler technology demands the most reliable, energy efficient components. Contact us for a quotation

A key component in choosing the right system, is the heat exchanger within the boiler, as maintenance costs, durability and product lifetime should all be considered when buying a boiler. As the two most common types of heat exchanger in the UK condensing boiler market, we have examined the differences between stainless steel and aluminium to offer a comparison of quality and longevity.

Heat Exchanger (half)

Stainless Steel Heat Exchangers:

Used by Viessmann throughout its entire condensing boiler range, stainless steel heat exchangers provide a high resistance to corrosion in a wide variety of pH levels, therefore increasing the useful life of your boiler. This provides long term value for money and requires less system downtime due to maintenance.

Important points to consider:

  • Increases useful life of your boiler.
  • Less downtime due to maintenance.
  • Does not require use of system inhibitors.
  • Recommended for filling with potable water (drinking water) no inhibitors required.
  • Self-cleaning.
  • Higher grade corrosion resistant material.

Heat Exchanger (close up)

Aluminium Heat Exchangers:

A lightweight and alternative option, Aluminium heat exchangers also provide high heat transfer but require special inhibitors when maintaining the system, which if not used can result in a high risk of damage to the boiler. Annual maintenance is also vital to remove aluminium oxides, which can build up and clog the condensate line.

Important points to consider:

  • pH treatment critical to longevity of the heat exchanger.
  • Artificially softened water not permitted.
  • Aluminium material corrodes through aluminium oxide build up and erodes further at high flow rates.
  • Reduced lifetime of the heat exchanger.
  • Cheaper to manufacture than stainless steel.

Heat Exchanger Steel v's Aluminium

All Viessmann gas condensing boilers are equipped with stainless steel Inox-Radial heat exchangers. This technology brings with it an extremely high efficiency rate of 98 percent and exceptionally reliable and efficient operation during its long service life.

Viessmann guarantees the Inox-Radial heat exchanger for ten years against leaks resulting from corrosion.

Contact us for a quotation

New Boiler Installation

Viessmann Installation at a New Forest Hotel

It’s hard not to be impressed at the work our engineers undertake especially when it comes to an installation such as this.

What a beautiful building for the installation to take place at.

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Now down to the main plant room. . .

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Two Viessmann gas boilers installed and awaiting to be fully connected and turned on.

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To an untrained eye, such as mine, even I can see the work that has gone into this Plant Room by the sheer size of the new cylinders and pipework.  All the old dropping pipework is coming out to be replaced by new straight and completely secured 2 ½” iron pipework and fittings.

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This not only shows the magnitude of the work involved, but that careful thought and design consideration has been made, to fit into the space available and to make all the equipment accessible and serviceable in the future.  Not forgetting that until it is time to switch over to our new system the old system has to be running as the hotel is fully booked as the work continues.

The Technical Side:

I would like to give you a rundown of the equipment used in this installation:

– 2 x Viessmann-W 200 Vitodens 60kW boilers
– 2 x Viessmann Vitocell 300-B 500L Cylinder
– Viessmann Low Loss Header and insulation
– Spirotrap MBL 2 ½ “
– Spirovent Dearerator 2 ½ ”
– Pumps
– 2 ½” Pipework
– Controls – Weather Compensated

Which means:

Our customer will have complete control of the heating and hot water system within the hotel.

The main plant room has 1 underfloor heating circuit for the conservatory, used as the dining room.  Then 3 individual fully weather compensated heating circuits for the main house ground floor, 1st floor bedrooms and 2nd floor bedrooms.  Meaning different temperatures and timings can be set for the different sections of the hotel.

So from an atmospheric conventionally flued system to include boilers and water heaters, they now have a balanced system with Viessmann high efficiency condensing technology with full weather compensation.

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What a difference we can make!

Written by ‘The Girl in the Office’.

Case Study - Viessmann Vitorondens 200-T Oil Boiler

Viessmann Installation at a Grade II Listed Home

When the owner of a former listed rectory dating back to around 1600 in a small village outside Salisbury, Wiltshire, came to replace the property’s fifty year old boiler and gravity fed heating system, he naturally had high expectations.

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The project needed to significantly reduced running costs (the old system consumed 2,000 litres of oil per month), provide a constant space heat temperature and enable the heating, hot water and secondary hot water circuits to be controlled independently and remotely. Salisbury-based Viessmann partner, AHS Ltd., specified a Viessmann Vitorondens oil-fired boiler, with weather compensation and Vitotrol 300A remote controls. The result is a modern, fuel efficient heating system which is saving £8,000 per year, or around 70 per cent of his previous expenditure on oil.

The Technical Side:
  • 60kW Vitorondens 200.
  • Vitocell 300-B 500L.
  • 3 x Header Divcon Units with mixers.
  • Vitocom 100 with Virotrol App.
  • Vitotrol 300A remote control (3 heating circuits).
  • Wilo Comfort COR-2 pressure booster set.
  • Break tank.
  • 2 x large expansion vessels.

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Viessmann Vitorondens oil-fired boiler, with weather compensation and Vitotrol 300A remote controls.

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The new heating system comprises three fully weather compensated heating circuits and one constant temperature circuit for under-floor heating.

Which means:

Saving space, saving oil.

With oil bills of almost £13,000 per year at the 6,660 sq. ft., six bedroom, four bathroom home, fuel efficiency was a major priority. The Viessmann system – attractive because of its product build quality, system performance and user- friendly controls – was also the only one to come with weather compensation controls. These would fully optimise the Vitorondens 200’s efficiency and improve internal comfort, regardless of external temperature.

The installed system provides three fully weather compensated heating circuits and one constant temperature circuit for under-floor heating. One cylinder loading circuit with controls operates the heating and hot water and also the secondary hot water circuits. A welcome benefit of the advanced Vitotrol 300A controls is that AHS can monitor the system remotely on behalf of its client.

Noise was also a key consideration as the boiler’s flue would terminate above an outside seating area. The Vitorondens outperformed its competitors on noise levels.

AHS was called in as one of the few companies who could take on the complexities of the equipment and the task of designing, specifying and constructing a new, 9 ft by 6 ft plant room, in an outbuilding next to the main house. Tight for space and access, there was a lot of kit to install and most of it had to be dismantled and built inside the room. Thanks to the swift work of AHS, the crossover to the new plant room was achieved in just two days.

Overall the installation has resulted in a huge reduction in heating costs and oil consumption of around 70 per cent. Says a satisfied AHS Customer:-

In a property with no particular thermal efficiency, the installation of a highly efficient oil boiler and the very latest in temperature curve control programming has achieved a massive shift in performance.

Written by ‘The Girl in the Office’.