| Field Controls TRIO Pro Commercial-Grade H13 HEPA and UV-C Air Purifier | aihomecamera.com | 379.99 USD | 499.99 USD | −24% |
| TRIO Pro Commercial Portable Air Purifier | shops.fieldcontrols.com | 957.95 USD | — | — |
| TRIO Plus Portable Air Purifier Canada | shops.fieldcontrols.com | 611.95 USD | — | — |
| TRIO Plus S Portable Air Purifier for home and commercial use | shops.fieldcontrols.com | 611.95 USD | — | — |
| TRIO Portable UV Air Purifier | shops.fieldcontrols.com | 598.95 USD | — | — |
| 4" Replacement Cartridge Air Filter for TRIO-16 and TRIO-20 (6-pack) | shops.fieldcontrols.com | 530.95 USD | — | — |
| SWG 4HD Power Vent Replacement Motor (old Style Squirrel Cage) #B1025 | fireplacestovedeals.com | 499.99 USD | — | — |
| SWG 4AF Power Vent Replacement Motor Kit #B1024 | fireplacestovedeals.com | 439.99 USD | — | — |
| Air Cleaner Airow3 | jahnda.com | 438.6 USD | — | — |
| 8" Diameter Black Barometric Damper w- Tee | northlineexpress.com | 402.99 USD | 0 USD | — |
| Field Controls Airow 3 | myfiltercompany.com | 340.97 USD | — | — |
| Field Controls CAC-120 Control for Multiple Appliances | plumbingplanet.com | 274.14 USD | — | — |
| TRIO Plus 5 Stage Portable Air Purifier | shops.fieldcontrols.com | 264.95 USD | — | — |
| Field Controls UVAire 602616241 UVX-16-24 In-Duct Air Cleaning System | myfiltercompany.com | 256.2 USD | — | — |
| FlexFilter™ Replacement Air Filters | shops.fieldcontrols.com | 252.95 USD | — | — |
| 6" Diameter Black Barometric Damper with Tee | northlineexpress.com | 251.99 USD | 0 USD | — |
| 8116324 Field Controls Automatic Vent Damper | witmermotor.com | 240.97 USD | — | — |
| Field Controls 602614100 T1-20RK Kit | myfiltercompany.com | 224.95 USD | — | — |
| Eliminator Crawl Space Vent Fan | shops.fieldcontrols.com | 161.95 USD | — | — |
| UV Replacement Lamp | 46365402 | furnace.direct | 155 USD | — | — |
| UV Replacement Lamp | 46365402 | cooling.direct | 152.95 USD | — | — |
| Field Controls Type RC/BT Draft Control For Coal Or Wood Stoves | bowlingfeedandhardware.com | 126.99 USD | — | — |
| Field Controls Type RC/BT Draft Control For Coal Or Wood Stoves | allensbrandenburg.com | 119.99 USD | — | — |
| 46000101A Field Controls Draft Regulator | witmermotor.com | 115.97 USD | — | — |
| ClearWave® Descaler Prevents and Removes Hard Water Scale | shops.fieldcontrols.com | 108.95 USD | — | — |
| Field Controls 46568600 20x25x5 MERV11 - Replacement Filter Media FC11-2025HS – 3-pack | myfiltercompany.com | 99.95 USD | — | — |
| Field Controls 46586000 20x25x5 MERV 8 - Replacement Filter Media FCRM8-2025 - 3 - Pack | myfiltercompany.com | 99.95 USD | — | — |
| Field Controls 46585900 16x25x5 MERV 8 - Replacement Filter Media FCRM8-1625 - 3 Pack | myfiltercompany.com | 99.95 USD | — | — |
| Type RC/BT Draft Control for Wood or Coal Residential Equipment | shops.fieldcontrols.com | 95.95 USD | — | — |
| Clarycarb ChloraGuard Activated Carbon Sediment Filter Polypropylene 5 Micron 10 x 2½ | shops.fieldcontrols.com | 79.95 USD | — | — |
| HVAC UVC Replacement Lamps | shops.fieldcontrols.com | 73.95 USD | — | — |
| 5" Replacement Cartridge Media Air Cleaner Filters | shops.fieldcontrols.com | 73.95 USD | — | — |
| 4" Replacement Cartridge Media Air Cleaner Filters | shops.fieldcontrols.com | 69.95 USD | — | — |
| Clarycarb Activated Carbon Wrap Sediment Filter Polypropylene 5 Micron 10 x 2½ | shops.fieldcontrols.com | 66.95 USD | — | — |
| Clarycarb CL2 Carbon Block Sediment Filter Polypropylene 5 Micron 10 x 2½ | shops.fieldcontrols.com | 66.95 USD | — | — |
| TRIO PRO Portable Air Purifier Replacement Filter Kit | shops.fieldcontrols.com | 60.95 USD | — | — |
| Field Controls GVD-5FC6 Automatischer Ventilator Klappenregler 24VAC GVD-5 6” | industriewaren.com | 59.99 EUR | — | — |
| Air Boosters | shops.fieldcontrols.com | 58.95 USD | — | — |
| TRIO-1000 Portable Air Purifier Replacement Filter and Lamp Kits | shops.fieldcontrols.com | 57.95 USD | — | — |
| Field Controls Dehumidifier Filter Combo for 60DH and 85DH | myfiltercompany.com | 54.95 USD | — | — |