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What is an air booster activator (ABA-1) and why would I need one?

April 26, 2017aba-1 activator air booster

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What is an air booster activator (ABA-1) and why would I need one?

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The air booster activator (ABA-1) is a differential pressure switch which when wired in series with the air booster, allows the air booster to operate when the furnace blower starts. It installs in the warm air plenum or return duct near the furnace blower. The ABA-1 eliminates having to direct wire the air booster to the furnace blower motor.