Durastar DRUM4260S2A & DRU1H42S2A 42,000 BTU 16.7 SEER2 Multi-Position Air Handler Sirius Heat Heat Pump System - R454B

You're right—thanks for the catch. Here’s the corrected long description using the submittal’s specs for the DRUM4260S2A & DRU1H42S2A pairing:

Durastar DRUM4260S2A & DRU1H42S2A – 42,000 BTU R-454B Multi-Position Air Handler Mini-Split Heat Pump System
The Durastar DRUM4260S2A and DRU1H42S2A system delivers 42,000 BTU of ducted comfort with Sirius Heat™ technology for reliable heating down to –22 °F . With a versatile multi-position air handler and an inverter-driven outdoor unit, it provides quiet, efficient performance for large residential or light commercial spaces.

General Information
System Type: Multi-position air handler mini-split heat pump system (indoor & outdoor)
Indoor Model: DRUM4260S2A
Outdoor Model: DRU1H42S2A
Capacity: 42,000 BTU Heating & Cooling
Room Size: Ideal for large homes or light commercial spaces
Operating Modes: Cool, Heat, Aux Heat, Dry, Fan, Auto
ENERGY STAR®: Several pairings available (varies by AHRI rating)
Refrigerant: R-454B, low-GWP, pre-charged (liquid 3/8″ , suction 3/4″ )

Key Features
• Sirius Heat™ : Full heating capacity at 0 °F ; operation to –22 °F
• Inverter Technology : Variable-speed compressor for efficiency and comfort
• Multi-Position Installation : Vertical upflow/downflow or horizontal left/right
• Quiet Operation : Indoor down to ~34 dB(A) (Lo); outdoor 65 dB(A)
• Smart Control : DRSTAT101 programmable thermostat compatible
• All-Aluminum Coil with Golden Fin anti-corrosion coating
• Built-In Base Pan Heater for winter readiness
• A2L Leak Detection and auto-protection safety features
• IAQ Ready : Humidifier ports and 24V thermostat compatibility
• Optional Electric Heat : Compatible with 3–10 kW heater kits
• Moisture Removal : Up to 195.3 pints/day

Specifications (Rated Conditions)
Cooling Capacity (Rated/Range): 42,000 BTU | 15,600 – 51,000 BTU
Heating Capacity (Rated/Range): 50,000 BTU | 15,500 – 57,300 BTU
SEER2 / EER2: 16.7 / 11.7
HSPF2 (Region 4 / Region 5): 9.5 / 8.0
COP (47 °F / 17 °F / 5 °F): 3.4 / 2.7 / 1.9
Airflow (Indoor – CFM): 1,601 (Turbo) – 1,095 (Lo)
Operating Temp Range (Cooling/Heating): –22 °F – 122 °F / –22 °F – 75 °F
Electrical: Indoor 115/208/230 V • 1-Ph • 60 Hz ; Outdoor 208/230 V • 1-Ph • 60 Hz
Indoor Unit Dimensions/Weight: 53″H × 24-1/2″W × 22-5/8″D • 162.9 lb
Outdoor Unit Dimensions/Weight: 38-9/16″W × 16-3/8″D × 38-3/8″H • 201.1 lb

Included Components
• DRUM4260S2A multi-position air handler
• DRU1H42S2A Sirius Heat™ outdoor condenser
• Built-in base pan heater

Ideal For
Contractors and homeowners needing a high-capacity, cold-climate-ready ducted system for large homes or commercial spaces—delivering reliable year-round comfort with flexible installation and low-temperature performance.