Skip to content
Our April Sale Is Live! | Click Or Call 833-658-3387

ACiQ 3.5 Ton 16.7 SEER2 Inverter Heat Pump System Extreme Heat Series R454B

By ACiQ | SKU: ACIQ-42-HPD ACIQ-42-AHD | ID: 089636
No Sales Tax - in most states excluding California
Manufacturer Warranty Included
Satisfaction Guarantee - or return within 30 Days
Most Products In Stock - Call or Text (833) 658-3387 for availability
$4,789.00 + FREE SHIPPING

ADD TO CART FOR BEST PRICE


ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

ACiQ 3.5 Ton Inverter Heat Pump – Extreme Heat Series (Model ACiQ-42-HPD) Built for demanding climates, the ACiQ-42-HPD delivers 12,000–50,000 BTUs of adaptive heating and cooling, with 100% heat output at 0°F and 80% at -22°F. Inverter technology, a smart learning condenser, and adaptive sizing ensure energy-efficient comfort year-round. Designed for ducted applications, this unit features eco-friendly R454B refrigerant, quiet performance, and a durable gold fin coil making it a reliable choice even under extreme conditions.

ACiQ-42-HPD 3.5 Ton Extreme Series Central Inverter Heat Pump – Key Features

  • Inverter-Driven Flexibility: Harnesses inverter technology to convert AC power to DC, enabling the compressor to adjust its speed. This allows the system to self-adjust BTU output based on demand—providing between 12,000–42,000 BTU for cooling and 12,000–50,000 BTU for heating, ensuring energy-efficient operation in varying weather conditions.

  • Smart Learning Condenser: Equipped with advanced sensors that monitor indoor and outdoor temperatures, duct pressure, refrigerant temperature, and overall system performance. Upon startup, the system enters a learning mode, optimizing future operations for energy savings and peak efficiency.

  • Adaptive Sizing for Custom Comfort: The ACiQ-42-HPD adjusts its capacity based on heating demands, providing ideal performance year-round. Unlike standard heat pumps, it prevents discomfort during hot months by automatically reducing the system's output for superior cooling performance with minimal humidity.

  • Extreme Heat Technology for Cold Climates: The ACiQ-42-HPD is engineered for extreme cold temperatures, providing reliable heating down to -22°F. It maintains 100% heat output at 0°F and 80% at -22°F, allowing the system to extract maximum heat even during subzero conditions—saving up to 75% on cold-weather heating costs compared to systems that rely on electric backup heat.

  • Versatile Year-Round Performance: This heat pump operates efficiently in both heating and cooling modes from -22°F to 122°F. Whether it's hot or cold outside, the system adjusts its output to maintain a comfortable indoor environment.

  • Environmentally Conscious R454B Refrigerant: Uses R454B refrigerant, which has a low global warming potential (GWP), making it a more sustainable and eco-friendly option for homes and businesses.

  • Gold Fin Condenser Coil Protection: The corrosion-resistant gold fin coating on the condenser coils helps increase the system's longevity and performance, particularly in areas with high humidity or corrosive environments like coastal regions.

  • Quiet and Reliable Operation: Designed for whisper-quiet operation, even during high-demand workloads, making it an ideal choice for both residential and commercial spaces where noise reduction is a priority.

  • Ducted System Compatibility: Easily integrates with existing ducted systems for seamless installation, providing an efficient solution to upgrade from older, less efficient heating and cooling units.

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

ACiQ 3.5 Ton Central Ducted Air Handler – Multi-Position (Model ACiQ-42-AHD) Engineered for high-capacity performance and year-round comfort, the ACiQ-42-AHD 3.5-ton air handler features a variable speed DC blower and smart communicating technology. It works seamlessly with your inverter condenser and thermostat to adjust BTU output automatically, enhancing efficiency and maintaining precise indoor temperatures. This multi-position unit (upflow, downflow, or horizontal) installs easily into your existing ductwork and is fully compatible with R454B refrigerant. Ideal for larger spaces, it provides reliable, quiet air distribution throughout your home.

ACiQ-42-AHD 3.5 Ton Air Handler – Key Features

  • Variable Speed DC Blower
    The ACiQ-42-AHD Air Handler features a variable speed DC blower for precise airflow control, resulting in enhanced comfort and energy efficiency. This advanced blower automatically adjusts its speed to meet your home’s heating and cooling needs in real time.

  • Communicating Technology for Intelligent Performance
    Designed with smart communicating technology, this air handler works in tandem with your inverter condenser and thermostat to self-adjust BTU output. This ensures optimal comfort, lower energy use, and a smoother system operation year-round.

  • 42,000 BTU Capacity (3.5 Ton)
    With a 42,000 BTU (3.5 ton) capacity, the ACiQ-42-AHD is ideal for larger residential spaces that require powerful, reliable climate control across multiple zones or rooms.

  • Efficient Air Distribution Through Existing Ductwork
    This air handler is made for central ducted systems and integrates seamlessly with your home’s existing ductwork. It delivers even heating and cooling throughout your space while maintaining quiet operation.

  • Flexible Multi-Positional Installation
    The multi-positional design allows for upflow, downflow, or horizontal left/right installation, making it a great fit for a wide range of system layouts and mechanical room configurations.

  • 24V Thermostat Compatible
    Compatible with any 24V thermostat, the ACiQ-42-AHD gives homeowners the flexibility to pair it with their preferred smart or programmable thermostat.

  • Eco-Friendly R454B Refrigerant Compatibility
    Built to work with R454B refrigerant, this air handler supports a more environmentally responsible HVAC system by reducing your carbon footprint and meeting future compliance standards.

Installation and Maintenance

Installing the ACiQ central ducted air handler is similar to replacing a standard air handler. A qualified technician will handle all necessary electrical, refrigerant, thermostat, and communication connections, and integrate the unit with your existing return and supply ductwork.

Designed for flexibility, this multi-positional air handler can be installed in upflow, downflow, or horizontal configurations. It’s compatible with any 24v thermostat that supports two-stage heating. For added comfort during colder months, optional supplemental electric heat kits are available as a backup heat source.

Routine maintenance is made simple with an intelligent control board that displays fault codes, helping quickly identify any issues within the system.

Please Note:
This air handler must be installed alongside a compatible condenser and other essential components, which may be sold separately if not included in your product bundle. If you intend to use straight electric heating, a compatible electric heat kit is required and available at an additional cost.


ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

Brand ACiQ SKU ACiQ-42-HPD
Refrigerant Charge 25' Weight (in lbs) 232.360000
Brand/Manufacturer ACiQ Replaces ACiQ-42-HPB
Product Features Inverter, Low Ambient Heating, Two Stage Condenser, Variable Speed Condenser
HSPF2 9.5 Cooling BTU 42,000 BTU
Heating BTU 50,000 BTU Maximum CFM 3037
Decibel Level (dBA) 65 Electric Heat Heat Pump
Refrigerant R454B SEER2 (Efficiency) 16.7
Condenser Stages Variable Speed Compressor Type Rotary
Liquid Valve Size 3/8" Suction Valve Size 3/4"
Electrical 208/230V 1 Phase 60 Hz Max Breaker Size 40 Amps
Min. Breaker Size 38 Amps Tonnage 3.5 Ton
BTU/Tonnage 42,000 BTU / 3.5 Ton Min/Max Outdoor Temp for Heating -22°F - 75°F
Min/Max Outdoor Temp for Cooling -22°F - 122°F Ambient Temperature Range -22°F - 122°F
Height 38.4" Width 38.6"
Depth 16.3" Warranty 12 Years Compressor and 7 Years Parts with Online Registration

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

Brand ACiQ SKU ACiQ-42-AHD
Weight 190.920000 Manufacturer ACiQ
Replaces ACiQ-42-AHB Cooling BTU 42,000 BTU
Maximum CFM 1601 Decibel Level (dBA) Up to 52 Decibels
Electric Backup Heat Capabilities 5, 10, 15, 20 Kilowatts Configuration Multi-Positional
Refrigerant R454B Liquid Line 3/8"
Suction Line 3/4" Electrical 208/230V 1 Phase 60 Hz
Max Breaker Size 15 Amps Min. Breaker Size 14.5 / 11.0 Amps
Tonnage 4 Ton BTU/Tonnage 42,000 BTU/3.5 Ton
Mini Split Type Multi-Positional Zone Compatibility Single Zone
Connection Flared Height 53"
Width 24.5" Depth 21"
Warranty 12 Years Compressor and 7 Years Parts with Online Registration

ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

Warranty Type Parts Compressor
Standard Warranty 5 year parts 7 year parts
Registered Warranty 7 year parts 12 year parts

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

Warranty Type Parts Compressor
Standard Warranty 5 year parts 7 year parts
Registered Warranty 7 year parts 12 year parts

ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

HPD Installation Manual

HPD Service Manual

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

AHD Installation Manual

AHD Owner's Manual

3.5 Ton HPD / AHD Submittal

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
Questions & Answers loading...

Our Real Customer Reviews

See what our customers have said about us.

Based on 6 reviews
100%
(6)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
very reliable company and great prices

Bought a few units from this company and they were very friendly and easy to work with. Either matched prices or beat the price and had fast shipping also.

Excellent company to purchase from

I wasn’t to sure about if this company could deliver it quickly but it arrived within a week. No issues. I needed this one for parts as my first one that I installed a year ago had the ecm go out on the blower fan. Parts are hard to come by for this Chinese brand. I think the ecm went out due to condensation in the main supply plenum dripping onto fan motor. I do like this ac unit but hope the fan lasts longer than a year. I covered the fan ecm with flex seal tape.

Goodman 5 Ton System

Excellent value, customer sales support (a human called to confirm online order... greatly appreciated!), fast shipping. Very happy customer.

A + Company

Great price, communication and service I will be buying another furnace from them Fantastic !

Sale representative Lopez was very experienced and professional. I would recommend this company to any one and I am looking forward to work with Lopez again.


ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

ACiQ 3.5 Ton Inverter Heat Pump – Extreme Heat Series (Model ACiQ-42-HPD) Built for demanding climates, the ACiQ-42-HPD delivers 12,000–50,000 BTUs of adaptive heating and cooling, with 100% heat output at 0°F and 80% at -22°F. Inverter technology, a smart learning condenser, and adaptive sizing ensure energy-efficient comfort year-round. Designed for ducted applications, this unit features eco-friendly R454B refrigerant, quiet performance, and a durable gold fin coil making it a reliable choice even under extreme conditions.

ACiQ-42-HPD 3.5 Ton Extreme Series Central Inverter Heat Pump – Key Features

  • Inverter-Driven Flexibility: Harnesses inverter technology to convert AC power to DC, enabling the compressor to adjust its speed. This allows the system to self-adjust BTU output based on demand—providing between 12,000–42,000 BTU for cooling and 12,000–50,000 BTU for heating, ensuring energy-efficient operation in varying weather conditions.

  • Smart Learning Condenser: Equipped with advanced sensors that monitor indoor and outdoor temperatures, duct pressure, refrigerant temperature, and overall system performance. Upon startup, the system enters a learning mode, optimizing future operations for energy savings and peak efficiency.

  • Adaptive Sizing for Custom Comfort: The ACiQ-42-HPD adjusts its capacity based on heating demands, providing ideal performance year-round. Unlike standard heat pumps, it prevents discomfort during hot months by automatically reducing the system's output for superior cooling performance with minimal humidity.

  • Extreme Heat Technology for Cold Climates: The ACiQ-42-HPD is engineered for extreme cold temperatures, providing reliable heating down to -22°F. It maintains 100% heat output at 0°F and 80% at -22°F, allowing the system to extract maximum heat even during subzero conditions—saving up to 75% on cold-weather heating costs compared to systems that rely on electric backup heat.

  • Versatile Year-Round Performance: This heat pump operates efficiently in both heating and cooling modes from -22°F to 122°F. Whether it's hot or cold outside, the system adjusts its output to maintain a comfortable indoor environment.

  • Environmentally Conscious R454B Refrigerant: Uses R454B refrigerant, which has a low global warming potential (GWP), making it a more sustainable and eco-friendly option for homes and businesses.

  • Gold Fin Condenser Coil Protection: The corrosion-resistant gold fin coating on the condenser coils helps increase the system's longevity and performance, particularly in areas with high humidity or corrosive environments like coastal regions.

  • Quiet and Reliable Operation: Designed for whisper-quiet operation, even during high-demand workloads, making it an ideal choice for both residential and commercial spaces where noise reduction is a priority.

  • Ducted System Compatibility: Easily integrates with existing ducted systems for seamless installation, providing an efficient solution to upgrade from older, less efficient heating and cooling units.

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

ACiQ 3.5 Ton Central Ducted Air Handler – Multi-Position (Model ACiQ-42-AHD) Engineered for high-capacity performance and year-round comfort, the ACiQ-42-AHD 3.5-ton air handler features a variable speed DC blower and smart communicating technology. It works seamlessly with your inverter condenser and thermostat to adjust BTU output automatically, enhancing efficiency and maintaining precise indoor temperatures. This multi-position unit (upflow, downflow, or horizontal) installs easily into your existing ductwork and is fully compatible with R454B refrigerant. Ideal for larger spaces, it provides reliable, quiet air distribution throughout your home.

ACiQ-42-AHD 3.5 Ton Air Handler – Key Features

  • Variable Speed DC Blower
    The ACiQ-42-AHD Air Handler features a variable speed DC blower for precise airflow control, resulting in enhanced comfort and energy efficiency. This advanced blower automatically adjusts its speed to meet your home’s heating and cooling needs in real time.

  • Communicating Technology for Intelligent Performance
    Designed with smart communicating technology, this air handler works in tandem with your inverter condenser and thermostat to self-adjust BTU output. This ensures optimal comfort, lower energy use, and a smoother system operation year-round.

  • 42,000 BTU Capacity (3.5 Ton)
    With a 42,000 BTU (3.5 ton) capacity, the ACiQ-42-AHD is ideal for larger residential spaces that require powerful, reliable climate control across multiple zones or rooms.

  • Efficient Air Distribution Through Existing Ductwork
    This air handler is made for central ducted systems and integrates seamlessly with your home’s existing ductwork. It delivers even heating and cooling throughout your space while maintaining quiet operation.

  • Flexible Multi-Positional Installation
    The multi-positional design allows for upflow, downflow, or horizontal left/right installation, making it a great fit for a wide range of system layouts and mechanical room configurations.

  • 24V Thermostat Compatible
    Compatible with any 24V thermostat, the ACiQ-42-AHD gives homeowners the flexibility to pair it with their preferred smart or programmable thermostat.

  • Eco-Friendly R454B Refrigerant Compatibility
    Built to work with R454B refrigerant, this air handler supports a more environmentally responsible HVAC system by reducing your carbon footprint and meeting future compliance standards.

Installation and Maintenance

Installing the ACiQ central ducted air handler is similar to replacing a standard air handler. A qualified technician will handle all necessary electrical, refrigerant, thermostat, and communication connections, and integrate the unit with your existing return and supply ductwork.

Designed for flexibility, this multi-positional air handler can be installed in upflow, downflow, or horizontal configurations. It’s compatible with any 24v thermostat that supports two-stage heating. For added comfort during colder months, optional supplemental electric heat kits are available as a backup heat source.

Routine maintenance is made simple with an intelligent control board that displays fault codes, helping quickly identify any issues within the system.

Please Note:
This air handler must be installed alongside a compatible condenser and other essential components, which may be sold separately if not included in your product bundle. If you intend to use straight electric heating, a compatible electric heat kit is required and available at an additional cost.


ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

Brand ACiQ SKU ACiQ-42-HPD
Refrigerant Charge 25' Weight (in lbs) 232.360000
Brand/Manufacturer ACiQ Replaces ACiQ-42-HPB
Product Features Inverter, Low Ambient Heating, Two Stage Condenser, Variable Speed Condenser
HSPF2 9.5 Cooling BTU 42,000 BTU
Heating BTU 50,000 BTU Maximum CFM 3037
Decibel Level (dBA) 65 Electric Heat Heat Pump
Refrigerant R454B SEER2 (Efficiency) 16.7
Condenser Stages Variable Speed Compressor Type Rotary
Liquid Valve Size 3/8" Suction Valve Size 3/4"
Electrical 208/230V 1 Phase 60 Hz Max Breaker Size 40 Amps
Min. Breaker Size 38 Amps Tonnage 3.5 Ton
BTU/Tonnage 42,000 BTU / 3.5 Ton Min/Max Outdoor Temp for Heating -22°F - 75°F
Min/Max Outdoor Temp for Cooling -22°F - 122°F Ambient Temperature Range -22°F - 122°F
Height 38.4" Width 38.6"
Depth 16.3" Warranty 12 Years Compressor and 7 Years Parts with Online Registration

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

Brand ACiQ SKU ACiQ-42-AHD
Weight 190.920000 Manufacturer ACiQ
Replaces ACiQ-42-AHB Cooling BTU 42,000 BTU
Maximum CFM 1601 Decibel Level (dBA) Up to 52 Decibels
Electric Backup Heat Capabilities 5, 10, 15, 20 Kilowatts Configuration Multi-Positional
Refrigerant R454B Liquid Line 3/8"
Suction Line 3/4" Electrical 208/230V 1 Phase 60 Hz
Max Breaker Size 15 Amps Min. Breaker Size 14.5 / 11.0 Amps
Tonnage 4 Ton BTU/Tonnage 42,000 BTU/3.5 Ton
Mini Split Type Multi-Positional Zone Compatibility Single Zone
Connection Flared Height 53"
Width 24.5" Depth 21"
Warranty 12 Years Compressor and 7 Years Parts with Online Registration

ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

Warranty Type Parts Compressor
Standard Warranty 5 year parts 7 year parts
Registered Warranty 7 year parts 12 year parts

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

Warranty Type Parts Compressor
Standard Warranty 5 year parts 7 year parts
Registered Warranty 7 year parts 12 year parts

ACiQ 3.5 Ton 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

HPD Installation Manual

HPD Service Manual

ACiQ 3.5 Ton Central Ducted Air Handler Multi-Position 21" Cabinet R454B ACIQ-42-AHD

AHD Installation Manual

AHD Owner's Manual

3.5 Ton HPD / AHD Submittal

We ship freight to the 48 contiguous states, excluding Hawaii and Alaska. Some shipping restrictions may apply. Liftgate services may incur an additional fee, which can be added at checkout.

Order Processing: Orders are processed within 1-3 business days (excluding weekends). Orders placed on Fridays will be processed the next business day. Once shipped, you’ll receive an email confirmation with tracking details. Backordered products may have longer processing times, and we will notify you of any delays.

Arrival of Goods: Freight delivery times depend on the carrier's schedule and routing. Estimated delivery times are provided at checkout. The carrier will contact you to arrange delivery, and you must be present to sign for the shipment.

Damages: Upon delivery, inspect your shipment carefully for any damage or discrepancies. Note any issues on the carrier’s delivery receipt and notify us within 24 hours. Claims made after this timeframe may be denied. Photographic proof is required for processing claims. Report damages or discrepancies immediately at support@hvacstore.com.

Returns: For returns unrelated to damage, contact us at support@hvacstore.com for authorization. Return shipping costs are the customer’s responsibility, and a 20% restocking fee applies. Items must be in original packaging and condition for a refund.

Delivery Receipt: Before signing the delivery receipt, inspect the shipment for any damage. Your signature confirms acceptance of the delivery unless issues are noted.

Policy Updates: Our shipping policy may change, and updates will be communicated via our website or other channels. For any questions, contact The HVAC Store at support@hvacstore.com or call (833) 658-3387.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)