Heat and energy recovery ventilators and methods of use

An energy recovery ventilator comprising:

• a housing comprising
• a first integral half formed from a molded high density expanded polystyrene having a density of greater than about 2 lb./ft3, the polystyrene integrally forming
• a first half supply inlet, a first half supply inlet chamber, a first half return inlet, a first half return inlet chamber, a return outlet chamber, and a return outlet and
• a second integral half matingly engaged to the first integral half and formed from a molded high density, expanded polystyrene having a density of greater than about 2 lb./ft3, the polystyrene integrally forming
• a second half supply inlet, a second half supply inlet chamber, a second half return inlet, a second half return inlet chamber, a supply outlet chamber, and a supply outlet, wherein
• the first half and second half supply inlets form the supply inlet,
• the first half and second half supply inlet chambers form the supply inlet chamber,
• the first half and second half return inlets form the return inlet, and
• the first half and second half return inlet chambers form the return inlet chamber;
• a heat exchanger comprising an axle having a first end connected to the first integral half and a second end connected to the second integral half, the heat exchanger adapted to rotate about the axle between the supply inlet chamber and the return inlet chamber;
• a first fan to circulate a first air stream through the supply inlet, supply inlet chamber, supply outlet chamber, and supply outlet;
• a second fan to circulate a second air stream through the return inlet, return inlet chamber, return outlet chamber, and return outlet;
• and
• a fan motor driving the first and second fans.