Answer : At BPE we rate our units over a flow range and the nominal 2000 cfm units start at over 90% and at full nominal flow rate of 2000 cfm for a 2000 series unit are 70% sensible efficient.

Others have 3000 cfm nominal units that are 100% ARI test at 750 cfm, at full nominal rating are only 38% efficeint. Ow!!! Look at the curve for a range of operating conditions.

Answer : An average commercial building, meeting current fresh out door air standards typically make up 30 to 40% of the heating and cooling loads of a typical HVAC system.

Answer : Cross Contamination is when exhaust air is reintroduced into the fresh air intake of a HVAC system.

Answer : No, Cross Contamination is only an issue if this exhaust air has harmful contaminants, such as toxic gases or pathogens or if the heat recovery media holds moisture and grows harmful agents.

Answer : Generally the less complicated, the less moving parts a system has the less maintenance is needed. BPE's Solution is simple and elegant, with very few moving parts.