Your browser isn't supported
It looks like you're using an old web browser. To get the most out of the site and to ensure guides display correctly, we suggest upgrading your browser now. Download the latest:

Welcome to the MSE Forums

We're home to a fantastic community of MoneySavers but anyone can post. Please exercise caution & report spam, illegal, offensive or libellous posts/messages: click "report" or email forumteam@. Skimlinks & other affiliated links are turned on

Search
  • FIRST POST
    Vincenzo
    Positive Input Ventilation System
    • #1
    • 6th Jul 07, 3:22 PM
    Positive Input Ventilation System 6th Jul 07 at 3:22 PM
    Hi everyone,

    I have recently let a flat out and the tenants have been complaining of damp. To cut a long story short, it is condensation and while I have helped the tenants to manage it correctly (who have been keen to help solve the problem) I need to find a permanent solution that does not rely on having sensible tenants!

    In anticipation of other suggestions, the property is as follows:
    - ground floor maisonette (detached house)
    - 9" brick solid walls (no cavity)
    - concrete floors and ceilings (quite a cold flat even with the heating on full blast)
    - new double glaxed windows with trickle vents

    During my research I came across the Nuaire Flatmaster 2000 and various other Positive input Ventilation Systems.

    Does anyone have experience of these. They sound great but do they actually work??? At the best part of a grand to install I really don't want to go to all the trouble to find they are all hype and no help!
Page 1
    • economiser
    • By economiser 6th Jul 07, 11:13 PM
    • 894 Posts
    • 308 Thanks
    economiser
    • #2
    • 6th Jul 07, 11:13 PM
    • #2
    • 6th Jul 07, 11:13 PM
    The important thing with any forced fan system is that the air can get out as well as in. There web site shows the air flowing throughout the flat (note that doors would need to be open to achieve this and you either need air bricks (or leaky windows) to let the air out. Notice also that the supply must not be directly into the bathroom or kitchen as it would spread vapour and smells throughout the house.

    There is also no guarantee that the air will ventilate all rooms as shown. It will take the path of least resistance and may be affected by wind pressures.

    Which areas of the flat are experiencing the problem? With bathroom and kitchen local extract fans might be more effective and a lot cheaper. Bedrooms are more difficult as fans are too noisy normally and some sort of permanent vent might be a solution.
    Last edited by economiser; 06-07-2007 at 11:14 PM. Reason: clarity
    • Doozergirl
    • By Doozergirl 6th Jul 07, 11:39 PM
    • 21,278 Posts
    • 59,750 Thanks
    Doozergirl
    • #3
    • 6th Jul 07, 11:39 PM
    • #3
    • 6th Jul 07, 11:39 PM
    Is it possible to reinstall a fireplace, if there was one?

    We had people recommend a system and then a taxi driver told me to just reinstall the fireplace. We did as it was something we'd have liked to have done anyway and the condensation problem just disappeared!
    Everything that is supposed to be in heaven is already here on earth.
  • greyteam1959
    • #4
    • 7th Jul 07, 12:28 PM
    • #4
    • 7th Jul 07, 12:28 PM
    Hi everyone,

    I have recently let a flat out and the tenants have been complaining of damp. To cut a long story short, it is condensation and while I have helped the tenants to manage it correctly (who have been keen to help solve the problem) I need to find a permanent solution that does not rely on having sensible tenants!

    In anticipation of other suggestions, the property is as follows:
    - ground floor maisonette (detached house)
    - 9" brick solid walls (no cavity)
    - concrete floors and ceilings (quite a cold flat even with the heating on full blast)
    - new double glaxed windows with trickle vents

    During my research I came across the Nuaire Flatmaster 2000 and various other Positive input Ventilation Systems.

    Does anyone have experience of these. They sound great but do they actually work??? At the best part of a grand to install I really don't want to go to all the trouble to find they are all hype and no help!
    Originally posted by Vincenzo
    I have installed one of these in my house and one in a friends house.
    http://www.nuaireforhomes.co.uk/drimaster2000.shtml
    This is the version you use if you have a loft space.
    Mine has been installed for over 10 years now and is absolutely brilliant.
    No mildew / no running condensation on windows etc etc
    My problems started when we installed upvc double glazing in the 1910 detached house.... sealed up all the draughts but also sealed in all the moisture and started to get problems with mildew on walls and in wardrobes.
    They seem to be expensive but I can assure you that they do work and in my case work very very well.
    If you want to know anything else just post...............
  • Vincenzo
    • #5
    • 9th Jul 07, 9:13 AM
    • #5
    • 9th Jul 07, 9:13 AM
    Mervyn11,

    I would have to install the Flatmaster but I presume they are fairly similar. Am I correct in thinking there is one inlet for the whole house? Does this mean that it only works well if all the doors are left open? Also does it make any noise or cause drafts?

    Cheers.
  • greyteam1959
    • #6
    • 15th Jul 07, 3:34 PM
    • #6
    • 15th Jul 07, 3:34 PM
    Yes only one inlet for the whole house.
    Doesnt really matter if the doors are open or shut cos a door is never really sealed that tight.
    They do make a slight noise but you soon get used to it and a slight draught can be felt if you stand ( under it in my case) near it.
    The slight drawbacks are far outweighed by the massive improvement in the problems associated with lack of ventilation.
  • dubainikolai
    • #7
    • 24th Jul 07, 1:44 PM
    • #7
    • 24th Jul 07, 1:44 PM
    Hello there

    I was wondering if anybody knew of the merits of a Heat Recovery Ventilation system as an alternative to the Positive Input Ventilation System in terms of combatting condensation in flats?. I know that the HRV systems are usually used in houses, with the inflow at ground level, but I guess flatmaster type unit could be used in houses as well flats?
  • onlyoneme
    • #8
    • 5th Nov 07, 4:01 PM
    • #8
    • 5th Nov 07, 4:01 PM
    Hi
    Does anyone know howmuch it cost to install one of these (Flatmaster), including the actual equipment.

    Thanks
  • tactical observer
    • #9
    • 16th Dec 09, 5:34 PM
    • #9
    • 16th Dec 09, 5:34 PM
    Yes only one inlet for the whole house.
    Doesnt really matter if the doors are open or shut cos a door is never really sealed that tight.
    They do make a slight noise but you soon get used to it and a slight draught can be felt if you stand ( under it in my case) near it.
    The slight drawbacks are far outweighed by the massive improvement in the problems associated with lack of ventilation.
    Originally posted by mervyn11
    Hi there - shot in the dark I know but I wonder if you are still around !
    im looking into these kind of systems for my late 19the century house, do you still have a good opinion of them - did you have any kind of surveys done before you had it fitted?
    Any other information would be great.
  • sparky101
    Condensation, Damp and Mould.
    Hi,

    A friend of mine recently bought an old barn conversion that was done about a year ago. Since moving in he has had problems with condensation, damp and mould. I/we have looked in to what we can do, done a bit of research on the internet and spoken to a few different ventilation companies, both have suggested heat recovery units and/or positive air input units to combat the problem. If you do a google search for positive input units it brings up various ventilation companies and some of them will do a free survey and recommend one of there products to use which we have yet to do. Once we have done this I will report back with what they say, but if anyone could give us anymore information regarding this matter we would be grateful.
    Cost wise, your looking at anything from £100 to £300 plus installation for a heat recovery unit maybe more, and anything from around £200 to £800 or more plus installation for a positive air input unit, all depending on the size of your property and so on.
    I myself am an electrician in Bristol and will be looking in to all this a bit more. If anyone requires or can give me anymore info please contact me on here or at reachsparky@yahoo.co.uk
  • tunster
    Hi sparky101 have you anymore info on the piv system? I just got a quote locally for £6k?? Seems way too much for my budget.If i can buy a unit somewhere i will install it myself. Can anyone tell me where to buy and how much i should pay.
    • muckybutt
    • By muckybutt 23rd Jan 12, 7:50 PM
    • 3,622 Posts
    • 3,419 Thanks
    muckybutt
    Hi sparky101 have you anymore info on the piv system? I just got a quote locally for £6k?? Seems way too much for my budget.If i can buy a unit somewhere i will install it myself. Can anyone tell me where to buy and how much i should pay.
    Originally posted by tunster
    Why comment on a thread from last year never mind 2007 ???

    Would have been easier to start a new thread as it avoids confusion as is more upto date.

    Anyhow all you need to do is google whole house ventilation, there are many systems available and even the heat recovery ones are less than the £6k you have been quoted.
    You may click thanks if you found my advice useful
  • tunster
    [QUOTE=muckybutt;50458309]Why comment on a thread from last year never mind 2007 ???

    Commented on the thread cos i need one now! Does it matter when the thread was posted? Last week,last year- 2007!
    All i want is a decent price for a system.
  • ogcabrera
    Hi tunster,

    I think 6k is way too much. I am about to install one of these and it shouldn't cost more than few hundred pounds + fitting.

    Google preservationsupplies and have a look at the condensation control units.

    I hope it helps.
  • castanley
    Nuaire PIV system
    I have had a Nuaire loft mounted PIV for several years. It does work - the condensation has gone away. However my family constantly moan about the cold air being pumped in from the loft. In the winter it is very cold.
  • mundania62
    For those considering this method of ventilation, here is a report by the Building Research Establishment. Seems positive. As a new user I am not allowed to post links so if you want to read it, cut and paste it to your browser.

    projects.bre.co.uk/positivevent/index.html

    From personal experience, and picking up on a post by another member;-
    I live in a 1930's art deco apartment block. Some flats have condensation problems and others do not. The ones which do have the problems invariably have blocked up the fire places in their living rooms.
Welcome to our new Forum!

Our aim's to save you money quickly and easily. We hope you like it!

Forum Team Contact us

Live Stats

476Posts Today

4,309Users online

Martin's Twitter
  • I'm on way to @GMB for my 740 Deals of the Week incl cheap prepay energy, £2.60 prosecco trick, Laura Ashley code, free Legoland tix & more

  • Finally cheaper prepay energy tariffs https://t.co/QBA3ZZEBrh pls share this with anyone you know who has a key/card meter.

  • RT @DollyDoDah: Just saved mum £337 a year by switching her dual fuel pre payment meters thanks to @MartinSLewis ????????????

  • Follow Martin