Dwell-Vent is a revolutionary approach to the ventilation of houses and flats, with substantial benefits:

• Energy savings - The 'supply-air' window used in the Dwell-Vent system leads to energy savings amounting to 10% - 20% of household fuel bills.
• Comfort - The air entering rooms is pre-warmed in winter to avoid draughts and make rooms feel comfortable.
• Health - The provision of reliable and generous levels of ventilation avoids problems of mould growth and other allergens detrimental to health.
• Passive operation - The system functions without the input of electricity or any moving parts resulting in low running and maintenance costs.

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