Posts filed under "Ventilation Solutions"

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  • Home ventilation systems – what’s blowing in the wind?

    There's a lot of talk these days about mechanical home ventilation systems. We've seen them on the telly, or on billboards, or our friends have installed one. Opinions about them vary, but in New Zealand they are certainly becoming more common-place. Around 10% of New Zealand homes are now thought to have one. This seems to be the result of an increased awareness of the importance of having a warm, dry home (something New Zealanders are only just coming to realise is achievable and - gasp! - preferable to what we're used to), a frustration with living in damp houses (think

  • Using DVS and Heat Pump together

    Greetings, I have a DVS and heat pump in my home and these cold nights I am sure my DVS is putting cold air back into rooms (testing the outlet with my hand). I read somewhere that some DVS systems work against heat pumps. Is this true or have I read wrong, because there is definitely cold air at roof level in my lounge most nights even when my pump is working to 25degrees. We are warm but I cant work out if the two systems work together.... or not. I'd be really grateful for any feedback about

  • Mechanical Ventilation to reduce condensation and heat the bedrooms?

    Has anyone here had a Lossnay ventilation system installed, or any other system that draws fresh air from outside (not the roof)? I already have a heat pump, but need something to reduce condensation and heat the bedrooms. But I'm worried about noise, and the

  • Heater in Linen Cupboard

    I have a Bretts 100 watt Damp Chaser heater in my linen cupboard. Could you advise how much this electric bar costs per month (30 days) of 24/7 use?  Robert

  • Moisture master or oil heater

    We have both and they both seem to LOVE those kilojoules! We want to know which to use under which circumstances to keep costs and energy use down. Any hits or knowledge

  • Glazed-in, controllable passive ventilation to reduce condensation

    Hi there. I've read through your answer to the FAQ about reducing condensation, and it's very well written. I agree with the opinion that going to the expense of installing a forced air or heat recovery system is often not warranted. You touch on achieving cross-flow passive (natural) ventilation by opening windows and using security stays for added security, which is correct, but I'd also like to draw your attention to the option of installing trickle (passive) vents in the windows. This is a very cost-effective way of providing continual cross-flow ventilation, without any of the security concerns from open windows. They

  • How effective are DVS and similar systems? Feedback welcome!

    Direct ventilation systems (such as those marketed under the brand names DVS and HRV) consist of a fan mounted in the attic which forces dry filtered air from the attic space through a system of ducts into the living areas of the house. The creates positive air pressure which forces moisture-laden air out through gaps in the building envelope. The DVS brand has been appraised by BRANZ as offering a solution to reducing condensation and improving ventilation, in buildings where no specific building code requirements exist for mechanical ventilation. However recent research from Otago University* has cast doubts on whether these

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