Rettig integrates ventilation with radiator heating systems

Published:  02 May, 2004

Purmo unit
Installed neatly under and behind a Rettig Compact or Plan radiator, the Purmo Air ventilation unit addresses ventilation issues by delivering warmed and filtered air.

A system to improve ventilation in buildings such as offices, hotels, schools and homes without compromising comfort has been introduced to the UK by Rettig Heating. The concept was developed to address growing health concerns such as asthma and toxic mould associated with inadequate ventilation in increasingly airtight buildings.

The Purmo ventilation unit is installed behind a radiator such as the Rettig Compact or Plan VKO models on an outside wall and delivers filtered and heated fresh air to the space. An extract fan in the ceiling provides the necessary air movement. Paths for the air to flow around the building are provided by installing grills in doors in air gaps above the doorsills. It is not necessary for every radiator to be fitted with a ventilation unit, nor for every room to include one.

The concept has been used in Scandinavian countries for a number of years and has been developed to comply with the European Standard EN442. Suitable radiators can have a Purmo ventilation unit added easily, since the forward movement of the radiator is said to be so small that the plumbing is not affected.

Air is drawn in through a 100 mm diameter duct, which can have a flow limiter inserted into it if required. The specially designed filters can be easily cleaned and replaced.

Although the air movement around the radiator effectively increases its output, the radiator should be size to deliver a heat output equal to the total of the heat losses from the room and the ventilation.

To achieve the best performance from the radiators, pressure difference in the room should not be too high, and this will depend on the relative leakiness of the building. The shape and size of the air duct behind the radiator combined with the outlet grille creates pressure loss, which would be included in design calculations.

uk@rettigheating.co.uk

For more information on this story, click here:May 04, 70

comments powered by Disqus

Search

Welcome

Welcome to Modern Building Services Online, the web edition of Modern Building Services (MBS) journal and the UK's most popular Building Services engineering site. Modern Building Services covers the entire Building Services Engineering industry. This site contains archived content from the journal, plus web-specific content.

When you go to our digital edition, you can also access the archive of digital editions.
October 2017: DIGITAL EDITION
ARCHIVE OF DIGITAL EDITIONS

Modern Building services has a group
on Linkedin - join us!

Show

Jobs

  • Intermediate / Senior Mechanical Engineer

    The Mechanical team undertake the design and specification of a range of Mechanical building services in a lead or supporting role, depending on project complexity and scale. You should demonstrate a flexible approach to design and team working and wil......

  • Senior Urban Designer

     Applicants will be Master’s Degree qualified Architects / Urban Designers, with a strong portfolio of work highlighting a variety of projects at a range of scales and types, with strong focus on regeneration, infrastructure-led projects and major develo......

  • Principal Structural Engineer

    We are currently recruiting on behalf of a global client, with a diverse range of award winning projects to their name. Their experience spans a host of market sectors, including transport, infrastructure, defence, scientific, education, high-tech and ......

more jobs »

Poll

"Is the Building Services industry lagging behind in the implementation of BIM?"



Calendar