Aprilaire 4270 Pleat Spacer Els PW 17895 the "B" suffix typically indicates

the "B" suffix typically indicates a packaging or bulk revision

Extended Installation Range: Remote sensing capabilities up to 1

Precision Airflow Regulation: Modulates the single sensor damper to ensure exact air-to-fuel ratios during the combustion process

For technicians troubleshooting frequent "open limit" fault codes

Aprilaire 4270 Pleat Spacer Els PW 17895 the "B" suffix typically indicatesThe Aprilaire 4270 Pleat Spacer is a critical component designed to maintain the performance and structural integrity of your whole house air cleaner. Specifically engineered for use with Aprilaire Model 2400 and Model 2140 air purifiers, this genuine OEM replacement part ensures that the filtering media maintains consistent pleat spacing. By preventing the filter folds from collapsing or bunching, this comb spacer facilitates uniform airflow across