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

By ACiQ | SKU: ACIQ-42-HPD | ID: 089658
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
$3,479.00 + FREE SHIPPING

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

HPD Installation Manual

HPD Service Manual

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.

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Based on 6 reviews
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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 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 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 16.7 SEER2 Central Heat Pump Inverter Extreme Series R454B ACIQ-42-HPD

HPD Installation Manual

HPD Service Manual

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
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