Description
MRCOOL ProDirect 42K BTU 3.5 Ton PSC Air Handler ONLY — HAH042FPA
Professional-Grade Multi-Position Air Handler for Central Ducted Systems
The MRCOOL ProDirect 42K BTU 3.5 Ton PSC Air Handler (HAH042FPA) is a professional-grade, multi-position indoor air handler designed for central ducted HVAC systems. As part of the ProDirect Series — MRCOOL's entry-level professional split system line — this air handler delivers reliable performance with a PSC (Permanent Split Capacitor) motor for dependable airflow distribution throughout spaces up to 2100 square feet.
Built with all-aluminum tubes and fins for long-lasting durability, this air handler is compatible with MRCOOL ProDirect Series condensers and other compatible R-410A condensers. The multi-position design allows installation in upflow, downflow, or horizontal configurations, providing flexibility for various installation scenarios. ETL Listed and AHRI Certified for verified performance and safety compliance.
Technical Specifications
| Specification | Value |
|---|---|
| Model / SKU | HAH042FPA |
| Series | ProDirect Series PSC Air Handler |
| Type | Air Handler ONLY — Multi-Position Central Ducted |
| Capacity | 42,000 BTU |
| Tonnage | 3.5 Ton |
| Coverage Area | 1800–2100 sq ft |
| Motor Type | PSC (Permanent Split Capacitor) |
| Refrigerant | R-410A |
| Voltage | 208-230V / 60Hz |
| Installation Positions | Upflow, Downflow, Horizontal |
| Dimensions | 21" W x 57.5" H x 20.5" D |
| Net Weight | 135 lbs (61.2 kg) |
| Coil Material | All-Aluminum Tubes and Fins |
| Air Leakage | 2% or less |
| Certifications | ETL Listed, AHRI Certified |
| Warranty | 10-Year Registered Parts |
Product Tips
- Air Handler ONLY: This listing is for the indoor air handler unit only. A compatible ProDirect Series condenser (sold separately) is required to complete the system.
- Multi-Position Installation: Can be installed in upflow, downflow, or horizontal configurations. Verify your installation space before ordering.
- R-410A Refrigerant: This unit uses R-410A refrigerant. Ensure your technician is certified for R-410A handling. Note: newer MRCOOL systems use R-454B.
- Professional Installation Required: Central ducted systems require a licensed HVAC technician. Proper vacuum, nitrogen testing, and refrigerant charging must be performed by a certified technician.
- 10-Year Warranty: Register within 90 days of installation for the full 10-Year Registered Parts Warranty.
Frequently Asked Questions
Compatible Accessories
| Accessory | Purpose |
|---|---|
| MRCOOL Central Split System Line Set | Connects indoor air handler to outdoor condenser |
| ProDirect Series Heat Pump Condenser | Matching outdoor unit for complete system |
| Signature Series Heat Kit | Electric heat strip for supplemental heating |
| Standard 24V Thermostat | System control (sold separately) |
Need help selecting the right condenser or accessories?
Contact our HVAC specialists for expert guidance on system configuration, sizing, and installation requirements.
Warranty Information
The MRCOOL ProDirect PSC Air Handler is covered by a 10-Year Registered Parts Warranty when properly registered within 90 days of installation by a licensed HVAC contractor. Keep your installation documentation and AHRI certification number for warranty claims.
Extra Information
Related Products
MRCOOL
SKU: HAH042FEA
MRCOOL ProDirect 42K BTU 3.5 Ton ECM Air Handler ONLY | HAH042FEA | HVACProSales
MRCOOL
SKU: MWMAH42HP230-O
MRCOOL Signature Series 42K BTU 3.5 Ton Air Handler ONLY | HVACProSales
MRCOOL
SKU: HAH018FPA
MRCOOL ProDirect 18K BTU 1.5 Ton PSC Air Handler ONLY | HAH018FPA | HVACProSales
MRCOOL
SKU: HAH036FPA
MRCOOL ProDirect 36K BTU 3 Ton PSC Air Handler ONLY | HAH036FPA | HVACProSales
MRCOOL
SKU: HAH024FPA