Genuine Honeywell HRF201BC HEPAClean Dual Action HEPA-Type Replacement Filter (U) for Air Purifiers This OEM genuine Honeywell HEPAClean Dual Action HEPA-Type filter U is extremely efficient in capturing harmful particles like pollen, dust, smoke, pet dander and dust mite debris (1). Filter back contains carbon pre-filter layer to help reduce odours. This filter fits model series: HHT270C (requires 1 filter), HHT290C (requires 2 filters). (1) Of particles 2 microns and larger. All performance claims are based on the room air passing through the filter when used as directed with the recommended Honeywell models. Genuine Honeywell HRF-B2C Household Gas Odour Reducing Replacement Pre-Filter (B) for Air Purifiers This OEM genuine Honeywell Household Gas Odour Reducing Replacement Pre-Filter B Plus is extremely efficient in deodorizing the air, reducing odours trapping larger particles such as dust, lint, fibers and pet fur (1). This filter fits model series: HHT-080C, HHT-081C, HHT-090C, HHT-145 149 series, HHT-011C, HHT-022C, HPA-051C, HPA060C, HPA-151C, HPA160C (1) All performance claims are based on the room air passing through the filter when used as directed with the recommended Honeywell models. This product does not reduce or absorb carbon monoxide gas. Make sure appliances are well ventilated.For best performance, replace the Honeywell HRF201BC HEPAClean filter 3x per year and the Honeywell HRF-B2C Pre-Filter every 3 months. Use only genuine Honeywell replacement filters to ensure stated product performance. The Honeywell HRF201BC HEPAClean Dual Action HEPA-Type Replacement Filter fits Honeywell HHT270C (requires 1 filter), HHT290C (requires 2 filters) air purifiers, while the Honeywell HRF-B2C Pre-Filters fit various Honeywell air purifier models like HHT-080C, HHT-081C, HHT-090C, HHT-145 149, HHT-011C, HHT-022C, HPA-051C, HPA060C, HPA-151C, HPA160C. This bundle includes 1 Honeywell HRF201BC HEPAClean Dual Action HEPA-Type Replacement Filter and 2 Honeywell HRF-B2C Household Gas Odour Reducing Replacement Pre-Filters for optimal air purification and odour reduction. The Honeywell HRF-B2C Household Gas Odour Reducing Replacement Pre-Filter deodorizes the air, reducing harmful Ammonia Benzene gases, household gases from cleaning products, paint furnishings, mildew odours, odours from bathrooms, pets, tobacco and cooking smoke with activated carbon and zeolite (Hydrated Aluminium Silicate). The Honeywell HRF201BC HEPAClean Dual Action HEPA-Type Replacement Filter captures up to 99 of microscopic allergens, 2 microns and larger, like pollen, dust, smoke, pet dander, and dust mite debris from the air that passes through the filter.