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Navien NAS Air Handler Calgary | Variable Speed | ER Plumbing

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Navien NAS Series

Navien NAS Series Air Handler

A complete indoor air distribution solution: blower, aluminum DX coil, and A2L sensor in one package. Available in constant-torque (NASS) and variable-speed (NASV) ECM versions, from 2 to 5 tons.

2–5 TonCapacity Range
Variable SpeedECM Motor Option
5–20 kWElectric Heat Kit Available
10 YrParts Warranty
Navien NAS Air Handler

Everything You Need in One Indoor Unit

Unlike a cased coil (which requires a separate furnace for the blower), the NAS Air Handler is a self-contained unit that includes the blower assembly, the aluminum DX refrigerant coil with factory-installed TXV, and the A2L refrigerant leak sensor — all in a single package.

The NAS is the right choice when you want to pair the NAZ Heat Pump or NAA Air Conditioner with an air handler (without a gas furnace) — or when you want to add electric heat via the field-installed heat kits.

  • Multi-position: upflow, downflow, and horizontal
  • NASS: constant-torque ECM (standard); NASV: constant-CFM variable-speed ECM
  • Corrosion-resistant aluminum DX refrigerant coil
  • Factory installed and calibrated TXV
  • Built-in A2L refrigerant sensor and mitigation control
  • Slide-out blower assembly for easy service access
  • Corrosion- and heat-resistant polymer drain pans
  • 5–20 kW field-installed electric heat kits available (with breaker)
  • Compatible with NAZ heat pump and NAA air conditioner (AHRI matched)
  • R-454B refrigerant
NAS Air Handler components detail NAS filter rack and accessories

NAS Air Handler Models & Specifications

ModelTypeCapacityWidthHeightDepthMax Electric Heat
NASS24B / NASV24BConstant Torque / Variable Speed2 Ton17.5″43″21″10 kW
NASS36C / NASV36CConstant Torque / Variable Speed3 Ton21″48″21″15 kW
NASS48D / NASV48DConstant Torque / Variable Speed4 Ton24.5″58.8″21.75″20 kW
NASS59D / NASV59DConstant Torque / Variable Speed5 Ton24.5″58.8″21.75″20 kW

All models: 208–230V / 60 Hz / 1-Phase. R-454B refrigerant. Zero clearance on top, back, and sides.

NAZ + NAS: The All-Electric Heat Pump System

Pair the NAZ Heat Pump with the NASV variable-speed air handler for an all-electric heating and cooling system — no gas required, up to 19.5 SEER2 and 9.3 HSPF2.

See the Heat Pump System →
✓ AHRI Matched with NAZ & NAA ✓ Variable-Speed ECM Option ✓ Field Electric Heat Kits (5–20 kW) ✓ 10-Year Parts Warranty (Registered) ✓ Supplied & Installed by ER Plumbing

Need an Air Handler for Your System?

ER Plumbing & Heating will select and install the right NAS model for your home and outdoor unit. We handle sizing, electrical connections, electric heat kit installation, and ductwork tie-in.

  • NASS or NASV selection guidance
  • Electric heat kit sizing and installation
  • Full system commissioning and A2L sensor test
  • 10-year warranty registration

Also explore: NAZ Heat Pump · NAA Air Conditioner · NAM Cased Coil