PUR Air Filter Part Number – Legacy Cross Reference Guide
Find updated replacement filter part numbers for older PUR Distribution air purifier systems. This reference guide helps homeowners, businesses, technicians, and returning customers quickly match discontinued or legacy filter numbers with the latest compatible PUR replacement filters.
PUR Distribution air purifier systems that used original filter part numbers have since been updated. To simplify ongoing maintenance and replacement ordering, this page provides a direct cross-reference between previous filter part numbers and the latest compatible PUR replacement filters.
Whether you are replacing a HEPA filter, carbon prefilter, UVC germicidal light, VOC filter, or Photo Catalytic Oxidation (PCO) filter, this guide ensures you can confidently identify the correct replacement component for your PUR air purifier system.
PUR replacement filters are engineered to help reduce airborne contaminants including dust, pollen, smoke, bacteria, viruses, VOCs, odours, mold spores, and fine particulate matter while supporting healthier indoor air quality in residential and commercial environments.
Updated PUR Replacement Filter Part Numbers
Use the reference table below to match your older PUR air filter part number with the new replacement part number.
| Product Name | Filter Name | Legacy Part # | Update Note | New Part # |
|---|---|---|---|---|
| PDHEPA400 VS | HEPA | DMH4-0400 | The DMH4-0400 has been updated to the P4-00 HEPA. | P4-00 |
| PDHEPA400 VS | PREFILTER | DMH4-0855 | The DMH4-0855 has been updated to the P4-55 prefilter. | P4-55 |
| PDHEPA400 VS | CARBON PREFILTER | DMH4-0810 | The DMH4-0810 has been updated to the P4-10 carbon prefilter. | P4-10 |
| PD900 SERIES | HEPA | DMH4-0400 | The DMH4-0400 has been updated to the P4-00 HEPA. | P4-00 |
| PD900 SERIES | CARBON PREFILTER | DM900-0855 | The DM900-0855 has been updated to the P9-55 carbon prefilter. | P9-55 |
| PD900 SERIES | UV LIGHTS | DM900-0191 | The DM900-0191 has been updated to the P9-91 UV lights. | P9-91 |
| PD900 SERIES | PCO | DM900-0450 | The DM900-0450 has been updated to the P9-50 PCO. | P9-50 |
| PD900 SERIES | CARBON POTASSIUM | DM900-0810 | The DM900-0810 has been updated to the P9-10 carbon potassium filter. | P9-10 |
| PD900 SERIES | 2-3 YEAR FILTER KITS | DM900-1003 | The DM900-1003 has been updated to the P9-03 2-3 year filter kit. | P9-03 |
| PDHEPA 350 | CARBON PREFILTER BLANKET | W3-0855 | The W3-0855 has been updated to the PW3-55 carbon prefilter blanket. | PW3-55 |
| PDHEPA 350 | TRUE HEPA | W3-0840 | The W3-0840 has been updated to the PW3-40 True HEPA. | PW3-40 |
| PDHEPA 350 | INNER CARBON VOC BLANKET | W3-0810 | The W3-0810 has been updated to the PW3-10 inner carbon VOC blanket. | PW3-10 |
| PDHEPA 450 / PDHEPA 375 VSC | CARBON PREFILTER BLANKET | W4-0855 | The W4-0855 has been updated to the PW4-55 carbon prefilter blanket. | PW4-55 |
| PDHEPA 450 / PDHEPA 375 VSC | TRUE HEPA | W4-0840 | The W4-0840 has been updated to the PW4-40 True HEPA. | PW4-40 |
| PDHEPA 450 / PDHEPA 375 VSC | INNER CARBON VOC BLANKET | W4-0810 | The W4-0810 has been updated to the PW4-10 inner carbon VOC blanket. | PW4-10 |
| PDHEPA 650 | CARBON PREFILTER BLANKET | W6-0855 | The W6-0855 has been updated to the PW6-55 carbon prefilter blanket. | PW6-55 |
| PDHEPA 650 | TRUE HEPA | W6-0840 | The W6-0840 has been updated to the PW6-40 True HEPA. | PW6-40 |
| PDHEPA 650 | INNER CARBON VOC BLANKET — OPTIONAL | W6-0810 | The W6-0810 has been updated to the PW6-10 inner carbon VOC blanket. | PW6-10 |
| PDHEPA550 | CARBON PREFILTER | W5-0810 | The W5-0810 has been updated to the PW6-10 carbon prefilter. | PW6-10 |
| PDHEPA550 | TRUE HEPA | W5-0860 | The W5-0860 has been updated to the PW6-40 True HEPA. | PW6-40 |
| PDHEPA550 | CARBON VOC AFTER FILTER | W5-0820 | The W5-0820 has been updated to the PW6-55 carbon VOC after filter. | PW6-55 |
| PDHEPA 600M-3 | CARBON PREFILTER | W5-0810 | The W5-0810 has been updated to the PW5-10 carbon prefilter. | PW5-10 |
| PDHEPA 600M-3 | TRUE HEPA | W5-0860-3 | The W5-0860-3 has been updated to the PW5-60-3 True HEPA. | PW5-60-3 |
| PDHEPA 600M-3 | CARBON VOC AFTER FILTER | W5-0820 | The W5-0820 has been updated to the PW5-20 carbon VOC after filter. | PW5-20 |
| PDHEPA 600M-3 | CARBON / POTASSIUM VOC AFTER FILTER — OPTIONAL | W5-0885 | The W5-0885 has been updated to the PW5-85 carbon / potassium VOC after filter. | PW5-85 |
Why Replacing Air Purification Filters Matters
Proper filter maintenance is essential to maintaining peak indoor air quality performance. Over time, HEPA filters, VOC filters, carbon prefilters, and UVC components become saturated or lose effectiveness, reducing their ability to capture airborne pollutants and neutralize contaminants.
Contact us today and ensure your PUR air purifier system is operating at its best.
Routine replacement helps maintain:
- HEPA filtration efficiency
- VOC and odour reduction
- Protection against airborne allergens
- UVC germicidal performance
- Healthy airflow and system performance
PUR Distribution Air Purifiers – FAQ
What happened to older PUR filter part numbers?
Many legacy PUR filter numbers were updated as the product catalog evolved. The filters themselves remain compatible, but the part numbers have been standardized for the new PUR website and ordering system.
Can I still replace discontinued PUR filters?
Yes. Most older PUR filter part numbers now have updated direct replacement filters listed on this page.
How do I find the replacement for my old PUR filter?
Use the cross-reference table above to match your older filter number with the updated replacement part number and product page.
Are the new filters compatible with older PUR systems?
Yes. The replacement filters listed on this page are designed to remain compatible with applicable older PUR air purification systems.
How often should PUR filters be replaced?
Replacement intervals vary depending on filter type and usage. HEPA filters typically last 2–4 years, while carbon and VOC filters may require replacement every 3–12 months depending on environmental conditions.