This is simply intended as information for anyone thinking of doing as my family did - namely purchasing a DVS Ventilation System.

Without outrageous expectations and bearing in mind we have a full complement of roof vents - we discovered the system does not perform as we perceived it would from advertising.   Of course, we rang the company and followed their advice to re-programme the system for our specific needs especially in Winter.

However, we have condensation occurring in part of our home during the Day Only.   Walls / windows / mirrors run with moisture if we are forgetful and close even one door in the affected sector of the home being a bedroom area.   We adhere to all the rules below except we do not have heating going in this relatively unused area and we shut the hall door at night to keep our lounge warm.   Only when the bedrooms are in use/heated at night no condensation occurs whether doors are shut or not which seems to suggest that the key is in fact the temperature of that portion of the house.

Relative to our bedroom because we DO NOT comply with the rules and leave our door shut window condensation is consistent.   Thank goodness for squeegees mops.    

In fairness to the DVS our lounge area only suffers from condensation on the coldest of Winter nights now.

If you too discover your DVS is not performing as you would reasonably expect that company will send you the following 5 rules.      If for any reason you are not able to comply with ALL of these rules to the letter you cannot expect the DVS Ventilation System to perform to your satisfaction.

Every 6 months we buy the top of the range filter which is another expense to anticipate.   Filters can be fitted by crawling into roof space (think dust / cobwebs) or paying another approx. $60.00 for fitting.

Our house presently is kept clean of condensation and mildew during Winter in the trouble spots noted by using elbow grease and a squeegee which ironically is how it used to be before the DVS!

Our family would  not have purchased this costly system if we had been able to see it in action prior to purchase.   We have since discovered there are other methods of eliminating condensation and we urge others to be more cautious than us by checking out all available options prior to purchase.

1.   MAINTAIN adequate heating, especially on colder nights.

2.  AVOID using unflued, LPG or bottled gas heaters in your home.

        3.  Keep internal doors OPEN, not just slightly ajar.

4. Keep external doors and windows CLOSED during colder weather.

5.            ENSURE adequate airflow can reach window surfaces.

DVS’s Five Orange Rules

‘Getting the Best from Your

DVS® Home Ventilation System’

Ann & Craig Rook