75496754
Jun 5, 1998
Apr 18, 2000
Ventilation apparatus and heat recovery apparatus, namely, combined ventilating and heat exchange units for stale air extraction and filtered clean air intake, ventilation units with heat recovery and humidity control, filters; heat recovery apparatus, namely, heat exchangers for use in controlling air quality in the home; parts and fittings for all of the aforesaid goods
Environmental Control Apparatus