The DVS Air Warmer is designed to pre-warm (or take the chill off)
cooler air from the roof space during winter months before it enters the home.
This pre-warmed air will not feel hot; it will only be a similar temperature to
that already in your home. Even with the DVS Air-Warmer operating,
normal home heating will still be required to maintain a comfortably heated
living environment and to assist in controlling condensation.