Upgrade & Maintenance Kits
Annual maintenance kits and upgrade kits for whole-home air quality equipment: Lennox PureAir and Healthy Climate air purifier kits, Aprilaire humidifier pad kits and air cleaner upgrade kits, and Santa-Fe dehumidifier hang and duct kits. Each kit is matched to specific models, so start with your unit's model number.
Our most popular brands are Lennox and Aprilaire upgrade and maintenance kits. Need only a replacement pad? See humidifier filters and pads.
Kit guide: find the right kit for your model ▾
Match the kit to your unit
Every kit lists the models it fits. Find the model number on your unit's label, then choose the kit that names it.
| Kit | Fits |
|---|---|
| Lennox X8796 | PureAir PCO16-28 |
| Lennox X8795 | PureAir PCO20-28 |
| Lennox X8797 | PureAir PCO14-23 |
| Aprilaire 4792 | Aprilaire 500 humidifier |
| Aprilaire 4793 | Aprilaire 550 humidifier |
| Aprilaire 4837 | Aprilaire 560 humidifier |
| Aprilaire 4839 | Aprilaire 600 humidifier |
| Aprilaire 4750 | Aprilaire 700 humidifier |
| Aprilaire 4785 | Aprilaire 350 and 360 humidifiers |
| Aprilaire UK213 / UK211 | 1210, 2210, 2216, 3210 and 4200 (20x25) |
| Aprilaire UK313 / UK311 | 1310, 2310, 3310 and 4300 (20x20) |
| Aprilaire UK413 / UK411 | 1410, 2410, 2416, 3410 and 4400 (16x25) |
| Aprilaire U1213 / U1413 | 2120 and 2200 / 2140 and 2400 |
Maintenance, upgrade or conversion?
- Annual maintenance kits bundle the parts that are replaced on a yearly schedule, such as humidifier pads or PureAir filter media.
- Aprilaire upgrade kits include a 3F MERV 11 or MERV 13 filter with conversion rails or a conversion frame, so an older cabinet takes current filters.
- Lennox conversion kits (Y4592, Y4593) move a first-generation Healthy Climate PCO unit to the second-generation design.
- Santa-Fe kits add hanging hardware, risers or supply and return ducting to Santa-Fe dehumidifiers.
When to replace
Annual kits are usually fitted once a year. Many homeowners change humidifier pads before the heating season starts.
