1.5 Ton Mitsubishi 16.2 SEER2 R454B Side Discharge Inverter Heat Pump System SUZAA18NL, SVZAP18NL
The Mitsubishi SUZ-AA18NL side discharge inverter heat pump and SVZ-AP18NL multi-position ducted air handler form an AHRI-matched 1.5 ton system (AHRI 215734928) rated at 16.2 SEER2, 12.0 EER2, and 9.8 HSPF2 using low-GWP R-454B refrigerant. The inverter-driven compressor modulates cooling output from 5,700 up to 18,000 BTU/h and delivers 20,000 BTU/h of rated heating at 47°F, making this compact package a smart fit for condos, smaller homes, additions, home offices, and light commercial suites that want quiet, ducted Mitsubishi comfort without the cost and short-cycling of an oversized central system.
Is a 1.5 Ton Heat Pump System the Right Size?
A 1.5 ton heat pump is typically matched to smaller conditioned spaces, often somewhere around 600 to 1,000 square feet in average construction, but the correct size is driven by the space's actual heat gain and heat loss rather than floor area alone. Because the SUZ-AA18NL can throttle down to 5,700 BTU/h in cooling, it is well suited to small zones where a fixed-speed unit would cycle on and off constantly and leave the air clammy.
Insulation levels, window area and sun exposure, ceiling height, duct layout and leakage, local climate, occupancy, and internal heat sources such as kitchens and electronics all change the load. A Manual J load calculation is the best way to confirm the size. For heating, this system keeps running down to -4°F outdoors and is rated at 12,800 BTU/h at 17°F, and an optional 5kW or 8kW heat strip can be added to the air handler for backup heat on the coldest mornings.
Ideal for: Condos and apartments, small single-family homes, bonus rooms and room additions, garage conversions, home offices, and small professional suites served by new or existing ductwork.
Need more capacity? Step up to the 2 Ton Mitsubishi SUZAA24NL & SVZAP24NL Heat Pump System for larger homes or zones that need additional heating and cooling capacity.
Recommended applications are general guidelines only. Actual system requirements depend on a load calculation, insulation, windows, climate, ductwork, occupancy, and desired indoor temperature. Request free sizing assistance, contact Budget Heating, or call 813-885-7999.
What's Included
| Outdoor Heat Pump Unit | SUZ-AA18NL — 1.5 Ton (18,000 BTU/h) Side Discharge Inverter Heat Pump |
|---|---|
| Indoor Air Handler | SVZ-AP18NL Multi-Position Ducted Air Handler |
| Application | Ducted Residential & Light Commercial Heating and Cooling |
| Refrigerant | R-454B (Low-GWP A2L) |
| Compressor | Inverter-Driven Variable-Capacity Compressor |
| Defrost | Reverse Cycle Defrost |
| Electrical | 208/230V, Single Phase, 60 Hz Outdoor Unit |
| Air Handler Electrical | 208/230V via Indoor-Outdoor S1-S2 Connection |
This matched pair pairs the SUZ-AA18NL outdoor unit with the SVZ-AP18NL air handler, so you get Mitsubishi inverter performance through conventional supply and return ducts instead of wall-mounted heads. It is one of several 1.5 ton heat pump systems we carry, and the only one in that size range from Mitsubishi built around a multi-position ducted air handler. Refrigerant connections are 1/4" liquid and 1/2" gas, so a 1/4" & 1/2" insulated copper and 14/4 wire combo handles the line set and communication wiring in one purchase, and the Mitsubishi MHK2 RedLINK wireless thermostat gives you a familiar wall-mounted control.
Heat Pump & Air Handler Features
SUZ-AA18NL Outdoor Heat Pump
- Inverter-driven compressor modulates cooling from 5,700 to 18,000 BTU/h
- 16.2 SEER2 and 12.0 EER2 cooling efficiency, 9.8 HSPF2 heating efficiency
- 20,000 BTU/h rated heating at 47°F with up to 23,800 BTU/h maximum
- 12,800 BTU/h rated heating at 17°F outdoor temperature
- Heating operation down to -4°F outdoor ambient
- Cooling operation up to 115°F and down to 23°F (0°F with optional wind baffle)
- Reverse-cycle defrost and linear expansion valve refrigerant control
- Precharged with R-454B for line sets up to 25 ft
- Up to 100 ft of piping and up to 50 ft of height difference
- Side discharge cabinet measures 33-1/16" W x 13" D x 34-5/8" H
SVZ-AP18NL Multi-Position Air Handler
- Installs horizontal left, horizontal right, vertical upflow, or downflow
- Selectable 0.30, 0.50, or 0.80 in.WG external static with three fan speeds at each setting
- 471, 573, and 675 CFM airflow settings
- Quiet operation from 36 to 45 dB(A)
- Totally enclosed direct-driven DC brushless (ECM) fan motor, 121 W
- Positive pressure cabinet with less than 1.0% air leakage at 1.0 in.WG
- Blow-through design allows coil cleaning once the blower is removed
- 1" R4.2 fiberglass-free insulation and hot-dip coated (ZAM) steel cabinet
- Built-in refrigerant leak detection sensor for R-454B safety
- Washable 20 x 16 x 1 filter included; 17" W x 21-5/8" D x 39-13/16" H, 97 lbs
Specifications & Manuals
Product documentation includes technical and performance data for the SUZ-AA outdoor unit, installation and service manuals for both the outdoor unit and the SVZ-AP air handler, replacement parts lists, and the SVZ-AP18NL submittal sheet to assist with system selection, installation, and service.
Frequently Asked Questions
What size home or zone is the SUZ-AA18NL system designed for?
The SUZ-AA18NL and SVZ-AP18NL are a 1.5 ton (18,000 BTU/h) system, which typically suits smaller homes, condos, and individual ducted zones. Because loads vary widely with insulation, windows, and climate, we recommend a load calculation before you buy, and our team can help with sizing.
Is the SUZAA18NL the smallest system in this Mitsubishi SVZ ducted lineup?
Yes. Budget Heating offers this ducted inverter series in 1.5, 2, 2.5, and 3 ton sizes, and the 1.5 ton SUZ-AA18NL is the entry point. It uses smaller 1/4" and 1/2" refrigerant connections and the most compact air handler cabinet in the group.
What refrigerant line sizes and line lengths does the 1.5 ton SUZ-AA18NL allow?
The SUZ-AA18NL uses a 1/4" liquid line and a 1/2" gas line with flared connections. It is precharged for 25 ft of line, accepts up to 100 ft of total piping, and allows up to 50 ft of height difference between the indoor and outdoor units. Lines longer than 25 ft need additional R-454B charge per the manual.
How cold can it get outside before the SUZ-AA18NL stops heating?
Mitsubishi rates the SUZ-AA18NL for heating operation down to -4°F outdoor temperature. Heating capacity drops as it gets colder, with 12,800 BTU/h rated at 17°F, so an optional electric heat strip is a good idea in colder climates.
Which electric heat strips fit the SVZ-AP18NL air handler?
The SVZ-AP18NL submittal lists 3kW (EH03-SVZ-S), 5kW (EH05-SVZ-S), and 8kW (EH08-SVZ-S) electric heater kits. The 5kW and 8kW kits are available as options on this system.
Where does a 1.5 ton ducted Mitsubishi heat pump get installed most often?
Common installations include condos, starter homes, in-law suites, finished bonus rooms, garage conversions, and small offices or retail suites that already have ductwork and want inverter efficiency without wall-mounted indoor units.
Mitsubishi SUZ Technical SpecificationsMitsubishi SUZ Installation InstructionsMitsubishi SUZ Parts ListMitsubishi SUZ Service ManualMitsubishi SVZ Installation InstructionsMitsubishi SVZ Parts ListMitsubishi SVZ Service ManualMitsubishi SVZ-AP18NL Submittal Sheet
