1. Ventilation with heat recovery;Tommerup,2005
2. Heat recovery ventilators in multifamily residences in the arctic;Ninomura;Ashrae Transactions,1995
3. Comparison of freezing control strategies for residential air-to-air heat recovery ventilators;Phillips;ASHRAE Transactions,1989
4. Mechanical ventilation system with heat recovery in cold climates;Kragh,2005
5. Real heat recovery with air handling units;Roulet;Energy and Buildings,2001