Tips and Tricks

Getting the best out of your DVS

The need for ventilation and heating

According to BRANZ, both adequate heating AND continuous ventilation are needed to prevent the excess moisture in your home that causes condensation, mould and mildew. BRANZ (and the Consumers’ Institute) make recommendations to assist in controlling condensation during colder weather.

If indoor temperatures are not maintained at reasonable levels, even normal levels of moisture inside the home can result in condensation during colder periods, even in homes that are well ventilated by a DVS ventilation system.

Owners of DVS Ventilation Systems may find it necessary to use a little more home heating, or to change the times of day the home is heated during colder weather, in order to balance the flow of cooler, drier air required to adequately control condensation and dampness. This is particularly so in the first few months or first winter after the DVS is installed. Once the home is drier, whatever home heating you use will be more effective. Owners of the Reclaim Heat Exchange Ventilation System will be able to reclaim and recycle heat generated inside the home (through cooking, showers, paid heating etc) that would ordinarily be lost through the ceilings.

Most DVS customers find that any additional heating required in colder winter months is more than compensated for by less heating being required during other times of the year. This is due to the DVS making use of free solar heat from the roof space on warmer days, and a drier home requiring less energy to heat than a damp home.

The warming benefits of a DVS ventilation system

Even when no additional heating is installed, many owners of a DVS Ventilation System say their homes feel warmer, even while their heating costs remain the same or even reduce over a full year of operation. This is due to some or all of the following effects from the DVS:

  • Free solar heated air from the roof space which can supplement or replace normal home heating on warm or sunny days (Classic and Reclaim with solar gain option installed);
  • Recycling of warmth trapped below the ceiling, and a more even distribution of existing heating throughout the home;
  • As the home dries out, less energy is required to heat dry air than moist air to maintain the same temperature.

The Reclaim heat exchange ventilation system offers even more warming benefits than the Classic DVS as it can actually reclaim up to 95% of the energy that passes through its heat exchanger. And that means you’ll need to spend less on direct heating or cooling to reach the desired temperature in your home.

Home heating

We recommend you consider your current home heating levels and take the opportunity to also invest in additional heating if needed, such as:

  • Our Tempervents which offer a cost-effective way to warm the air that comes into your home through the ceiling vents.
  • A Fujitsu or Mitsubishi Heat Pump from DVS is today’s safe, easy and economical way to keep individual rooms or your whole home comfortable all year round.
  • A DVS Air-Warmer can pre-warm incoming air on cold days or nights.
  • Atlantic® panel heaters.
  • Any electric (e.g. oil column heater) or flued gas heater (not unflued LPG or bayonet fitting heaters) or solid fuel burners (e.g. wood pellet fires). The use of unflued or bottled gas heating is not recommended by DVS.

For further information, please click here to fill in our online request form or call 0800 387 387.

Home insulation

We also recommend you consider improving your home’s insulation to increase the efficiency of existing and any additional heating. Improved insulation can reduce (but not eliminate) the need for additional heating. Talk to your local DVS consultant for more advice on insulation.

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