Nantong Deli manufactures replacement evaporative water panels for furnace-mounted and whole-house bypass humidifiers. Same plant-fibre composite media used by major HVAC brands — factory direct, without the retail markup. Free samples in 7 days.
What Is a Furnace Humidifier Filter?
A furnace humidifier filter — also called an evaporative water panel, humidifier pad, or water pad — is the replaceable evaporative media inside a whole-house bypass humidifier connected to your forced-air HVAC system. As furnace-heated air passes through the water-saturated panel, moisture is released into your home's ductwork and distributed room-by-room.
Unlike portable humidifiers, whole-house furnace humidifiers operate continuously during the heating season. The evaporative pad must handle:
- High airflow rates (100–400 CFM depending on unit size)
- Continuous water flow from the saddle valve feed
- Hard water scale accumulation (calcium and magnesium carbonate deposits)
- Temperature cycling as the furnace cycles on and off
This makes material quality and structural integrity the two dominant factors in how to choose a furnace humidifier filter — not simply absorption rate.
Compatible Models — Furnace Humidifier Filter Replacement
| Brand | Compatible Model Numbers | Panel Size | Deli Part # |
|---|---|---|---|
| Aprilaire | 35, 45 | 10" × 13" × 1.75" | DL-FH-AP35 |
| Aprilaire | 110, 350, 360 | 10" × 13" × 1.75" | DL-FH-AP110 |
| Aprilaire | 500, 500M | 10" × 13" × 1.75" | DL-FH-AP500 |
| Aprilaire | 550, 558 | 10" × 16" × 2" | DL-FH-AP550 |
| Aprilaire | 600, 600M | 10" × 16" × 2" | DL-FH-AP600 |
| Aprilaire | 700, 760 | 11" × 22" × 1.75" | DL-FH-AP700 |
| Skuttle | 000-0445-041, Model 60 | 10" × 13" × 1.75" | DL-FH-SK60 |
| Skuttle | Model 86, Model 90 | 11" × 11" × 2" | DL-FH-SK86 |
| GeneralAire | GA35-1042, Elite 65, Elite 70 | 10" × 13" × 1.75" | DL-FH-GA35 |
| GeneralAire | DS35, DS1042 | 10" × 13" × 1.75" | DL-FH-GADS |
| Honeywell TrueEASE | HC22A1007, HE120, HE220 | 10" × 13" × 1.75" | DL-FH-HW22A |
| Honeywell TrueEASE | HC26A1008, HE240, HE260 | 10" × 13" × 2.5" | DL-FH-HW26A |
| Honeywell | HE300A, HE360A | 10" × 16" × 2" | DL-FH-HW300 |
| Lennox | WB2-17, HCWB317 | 10" × 13" × 1.75" | DL-FH-LX17 |
| Bryant / Carrier | HUMCCWBP1218 | 10" × 13" × 1.75" | DL-FH-BR12 |
| Emerson | MoistAir MA0950 | 10" × 13" × 2" | DL-FH-EM950 |
NT Deli is an independent OEM manufacturer. Brand names listed are trademarks of their respective owners. Our panels are aftermarket replacements, not manufactured by or affiliated with those brands.
Furnace Humidifier Water Panel Specifications
| Specification | NT Deli Standard Panel | NT Deli Premium Panel |
|---|---|---|
| Media Composition | Plant-fibre + textile-fibre composite | Plant-fibre + ceramic-coated aluminium mesh hybrid |
| Antimicrobial Treatment | ✅ Integrated inorganic (lifetime, not surface-coat) | ✅ Integrated inorganic + silver-ion |
| Wicking Rate | High — full saturation in <8 min | Very high — full saturation in <5 min |
| Structural Substrate | Hot-melt bonded PET frame | Aluminium oxide honeycomb frame |
| Mineral Scale Resistance | Moderate — standard replacement cycle 1 season | High — extended service in hard water areas |
| Max Operating Temperature | 60°C (140°F) | 80°C (176°F) |
| Max Airflow | 350 CFM | 500 CFM |
| Available Sizes | Standard OEM match + custom | Standard OEM match + custom |
| Certifications | ISO 9001:2015, ISO 14001, RoHS | ISO 9001:2015, ISO 14001, RoHS, SGS tested |
| MOQ | 300 pcs | 500 pcs |
| Sample Lead Time | 7–10 business days | 10–14 business days |
Why Furnace Humidifier Filters Fail Early — And How to Avoid It
The Hard Water Problem
In regions with water hardness above 150 ppm (Western US, Midwest, Texas), calcium and magnesium carbonate deposits accumulate rapidly on evaporative water panels. This mineral scale:
- Blocks the capillary channels in the panel substrate, reducing effective wicking surface area
- Increases airflow resistance through the pad, reducing humidification output
- Creates an environment for mold and bacteria to colonize if antimicrobial treatment is insufficient
The fix: Use panels with integrated (not surface-applied) antimicrobial treatment and a substrate that resists mineral bridging. Our Premium Panel's ceramic-aluminium oxide hybrid substrate is specifically engineered for hard water environments.
The Generic Panel Problem
Generic furnace humidifier pads sold on Amazon typically use a single-density cellulose substrate without integrated antimicrobial treatment. These panels:
- Use a surface-applied biocide wash that degrades after 2–4 wet cycles
- Have a coarser substrate structure with fewer capillary contact points per cm²
- Use weaker adhesive bonding at the frame that fails under thermal cycling
The cost difference between a generic pad and an OEM-grade panel is $1–3 per unit. The cost of a service call when a failed pad causes mold growth in your ductwork is $200–800.
The OEM Markup Problem
Aprilaire replacement filter 35 retails at $14–22 depending on the channel. At our factory-direct pricing for wholesale quantities:
| Quantity | Price per panel |
|---|---|
| Sample (1–10 pcs) | Contact for pricing |
| 300–999 pcs | From $1.20/pc |
| 1,000–4,999 pcs | From $0.95/pc |
| 5,000+ pcs | From $0.75/pc |
The manufacturing cost of an Aprilaire-compatible panel is well-established. What you pay in retail is channel margin. Factory direct eliminates that.
Who Buys Furnace Humidifier Filters from NT Deli?
HVAC Distributors & Wholesalers
Stocking NT Deli panels as private-label or under your own brand for HVAC contractor supply. We support custom packaging with your logo and part numbering system.
Amazon & E-Commerce Sellers
Sourcing OEM-grade panels for Amazon FBA or Shopify DTC. We provide FNSKU-ready packaging and FBA prep-compliant carton specs.
Appliance & HVAC OEM Brands
Integrating our panels into new humidifier product lines. We provide engineering samples, dimensional drawings, and material certification packages.
Property Management Companies
Fleet replacement programs for apartment complexes, hotels, and commercial buildings. We support standing orders with scheduled delivery.
NT Deli vs OEM Retail — Side-by-Side Comparison
| Feature | NT Deli Factory Direct | Aprilaire OEM Retail | Generic Amazon |
|---|---|---|---|
| Media composition | Plant-fibre composite (patented) | Cellulose + binder | Cellulose (unspecified) |
| Antimicrobial | Integrated inorganic treatment | Integrated (varies by model) | Surface wash-off coating |
| Structural frame | Hot-melt bonded PET, temp-rated | Polymethylpentene (PMP) | ABS plastic, lower temp rating |
| Hard water performance | Moderate–High (Premium: High) | High | Low–Moderate |
| Certifications | ISO 9001, ISO 14001, RoHS | FCC, UL listed (unit level) | Usually none |
| MOQ | 300 pcs | N/A (retail) | N/A (retail) |
| Price (wholesale, 1k+) | From $0.95/pc | $14–22/pc retail | $3–6/pc |
| OEM labeling | ✅ Available | ❌ | ❌ |