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aciq|SKU:R4H5S42AKAAA

ACiQ 3.5 Ton 14.3 SEER2 Heat Pump Condenser

42,000 BTU Heating and Cooling for Grid-Independent Comfort

42,000 BTU capacity — Heats and cools medium homes reliably
Single-stage scroll compressor — Proven design with fewer failure points
76 dBA operation — Runs without disrupting your property
208/230V single-phase — Matches standard residential electrical panels
Filter drier included — Field-installed for clean refrigerant flow
  • FREE System Design Consultation -- Our team sizes your full HVAC setup for your actual space
  • Free Shipping -- Ships free via LTL freight, no surprise charges

$2,657.95

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ACiQ 3.5 Ton 14.3 SEER2 ACiQ Heat Pump Condenser
ACiQ 3.5 Ton 14.3 SEER2 ACiQ Heat Pump Condenser
$2,657.95

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In the box

  • ACiQ 3.5 Ton Heat Pump Condenser
  • Filter drier (field-installed)
ACiQ 3.5 Ton 14.3 SEER2 ACiQ Heat Pump Condenser
ACiQ 3.5 Ton 14.3 SEER2 Heat Pump Condenser
$2,657.95

42,000 BTU Heating and Cooling for Grid-Independent Comfort

The ACiQ R4H5S42AKAAA delivers 42,000 BTU of both heating and cooling through a single-stage scroll compressor, making it a field-tested workhorse for medium-sized homes and light commercial spaces. At 76 dBA, it runs quietly without sacrificing output. Designed for straightforward installation with a field-installed filter drier included, this weatherproof condenser handles changing seasons reliably. Whether you're outfitting an off-grid homestead or a rural workshop, this unit keeps your climate controlled without depending on the utility grid.

FREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORTFREE SHIPPING30-DAY RETURNSEXPERT SUPPORT
42,000 BTU Output
Scroll Compressor Design
R410A Refrigerant
Filter Drier Included
14.3
SEER2 Efficiency Rating
42,000
BTU Heating & Cooling
76 dBA
Sound Pressure Level
Heating That Doesn't Quit When the Grid Does

Heating That Doesn't Quit When the Grid Does

Most homeowners run their HVAC straight from utility power — which means when the grid drops, so does your climate control. Pair this 42,000 BTU condenser with your off-grid power system and that vulnerability disappears. At Off Grid Vault, every component we carry is vetted to work within real self-reliant setups — not just grid-tied installations that go dark the moment you need them most. The single-stage scroll compressor runs on 208/230V single-phase power, compatible with the hybrid inverters and battery banks serious independence builders already own. No mix-and-match guesswork, no hoping a random marketplace condenser plays nice with your inverter. We stand behind the compatibility because we already checked it.

42,000 BTU Covers Your Whole Living Space

42,000 BTU Covers Your Whole Living Space

This 3.5-ton unit delivers 42,000 BTU of both heating and cooling — enough to handle a medium-sized home in average conditions. The single-stage scroll compressor keeps operation straightforward and serviceable, with fewer moving parts than multi-stage alternatives. At 76 dBA, it runs at a noise level that won't dominate your property, whether you are heating a homestead through a January cold snap or cooling a cabin in August. R410A refrigerant provides proven thermal transfer performance across both modes, and the 14.3 SEER2 rating keeps energy draw manageable — critical when every watt comes from your solar array and battery bank rather than a utility meter.

Specs That Match Your System, Not Guesswork

Specs That Match Your System, Not Guesswork

208/230V single-phase 60 Hz power. 40-amp max breaker. 3/8 inch liquid valve and 7/8 inch suction valve. These are the connection points your installer or your own hands need to integrate this condenser into an existing or new system. The filter drier ships included for field installation, protecting the refrigerant circuit from moisture and contaminants from day one. At 216 lbs and a compact 31 3/16 inch cube footprint, this unit fits where larger multi-stage units cannot. Every specification is straightforward and verifiable — exactly the kind of transparency that matters when you are building a grid-independent system you plan to rely on for years, not seasons.

Is This Condenser Right for Your Setup?

Verify these conditions before adding to your system.

  • Your space requires 3.5 tons (42,000 BTU) of heating or cooling capacity
  • Your indoor coil and line set match 3/8" liquid and 7/8" suction valve sizes
  • You have a minimum 31 3/16" x 31 3/16" footprint with adequate available

Where This Condenser Performs

Built for real-world applications where reliability matters.

Off-Grid Homesteads
Light Commercial Spaces
Rural Workshops

Full specifications

At a glance

Dimensions
31 3/16" H x 31 3/16" W x 31 3/16"
Power
0.25 HP
Warranty
See product page
Full specifications14 data points across 4 categories

Dimensions

Weight (in lbs)216.000000
Dimensions31 3/16" H x 31 3/16" W x 31 3/16"

Power & Performance

Cooling BTU42,000
Heating BTU42,000
SEER2 (Efficiency)14.3
Decibel Level (dBA)76
Horsepower0.25 HP
RefrigerantR410A
Condenser StagesSingle Stage
Compressor TypeScroll
Liquid Valve Size3/8"
Suction Valve Size7/8"

Materials

ConstructionSee product page

Compliance & Warranty

WarrantySee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This is what you can expect from us.

Free ShippingShips free to your door — LTL freight included on large systems, no surprise charges.
30-Day Performance GuaranteeIf it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free System Design ConsultationOur engineers size your system for your actual consumption — no guesswork, no incompatible components.
★★★★★
“Paired this with my EG4 system and a matching coil. 42,000 BTU is plenty for my 1,400 sq ft cabin — keeps it comfortable in both summer and shoulder season. The single-stage design is exactly what I wanted: simple, serviceable, no proprietary circuit boards to worry about. Off Grid Vault confirmed my compatibility questions before I ordered, which saved me from making a costly mismatch.”
F
First L.Prescott, AZ

ACiQ Single Stage – 3.5 Ton 14.3 SEER2 Heat Pump

The ACiQ R4H5S42AKAAA is a versatile and reliable heat pump condenser designed to offer optimal comfort without breaking the bank. Built to meet the demands of various environments, this unit is a highly effective solution for both residential and light commercial applications. It provides efficient heating and cooling, making it a practical choice for homeowners and businesses looking for a dependable system that can adapt to changing seasons.

This condenser stands out as an affordable option, delivering strong performance and durability while remaining cost-effective. Whether you’re upgrading an existing system or installing a new one, the ACiQ R4H5S42AKAAA offers an all-around solution that balances comfort, efficiency, and budget. Its standard design ensures compatibility with a wide range of heat pump setups, making it a solid choice for almost any application, from single-family homes to small offices.


ACiQ 3.5 Ton 14.3 SEER2 ACiQ Heat Pump Specs

ACiQ 3 Ton 14.3 SEER2 Heat Pump
  • Weight (in lbs): 216.000000
  • Dimensions: 31 3/16″ H x 31 3/16″ W x 31 3/16″
  • Cooling BTU: 42,000
  • Heating BTU: 42,000
  • Decibel Level (dBA): 76
  • Horsepower: 0.25 HP
  • Refrigerant: R410A
  • SEER2 (Efficiency): 14.3
  • Condenser Stages: Single Stage
  • Compressor Type: Scroll
  • Liquid Valve Size: 3/8″
  • Suction Valve Size: 7/8″
  • Electrical: 208/230v 1 Phase 60 Hz
  • Phase: Single Phase
  • Max Breaker Size: 40 Amps
  • Min. Breaker Size: 24.7 Amps
  • Tonnage: 3.5 Ton


ACiQ 3.5 Ton 14.3 SEER2 ACiQ Heat Pump Features

  • 3.5 ton, 14.3 SEER2 heat pump condenser
  • Can cool up to a medium house in average conditions
  • Single stage compressor
  • Filter drier included to be field-installed


Your Satisfaction with ACiQ is Guaranteed:

  • Lowest Price Guaranteed
  • Limited 10 Year Warranty

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Frequently Asked Questions

When you pair this 42,000 BTU heat pump with a solar and battery system, every BTU of heating and cooling comes from your own power generation rather than utility rates that climb year over year. The single-stage scroll compressor draws consistently manageable power on a 40-amp breaker, integrating cleanly into an off-grid architecture. The 14.3 SEER2 rating keeps that draw efficient. If your current winter heating runs $200 to $400 per month through a utility meter, redirecting that cost into your own system creates a calculable return timeline.
Off Grid Vault is an authorized dealer for the brands we carry. That matters because warranty claims go through us directly — not through a support ticket queue with no accountability. If this condenser does not perform as specified within the first 30 days and is uninstalled in original packaging, we make it right with our performance guarantee. For installed systems, manufacturer warranty claims are handled through us as your authorized dealer. You are not buying from a marketplace listing with no after-offer support.
This 3.5-ton condenser uses standard 3/8 inch liquid line and 7/8 inch suction line connections, which match common residential and light commercial configurations. The single-stage operation keeps it compatible with a wide range of air handlers designed for heat pump use. For exact compatibility with your specific indoor unit, take advantage of our free system design consultation — tell us your existing setup or planned configuration, and our team will confirm whether this condenser integrates correctly. No guesswork, no mismatched components.
Single-stage scroll compressors are a field-tested design with fewer failure points than variable-speed alternatives — fewer electronics, fewer sensors, fewer things that can go wrong. This condenser uses R410A refrigerant with an included filter drier to protect the refrigerant circuit from moisture and contaminants from installation day forward. For off-grid setups where service access may be limited, simpler architecture is an advantage, not a compromise. The 14.3 SEER2 efficiency is achieved without the complexity that drives up repair costs on multi-stage units.
This condenser ships free via LTL freight to your location. Installation requires a qualified HVAC technician — the filter drier is included but must be field-installed, and the refrigerant lines need proper brazing and evacuation. Electrical connection is straightforward: 208/230V single-phase on a 40-amp max breaker. If you are building a new system, our free system design consultation can help you spec the matching indoor components before this unit arrives, so your installer has everything on site when the truck pulls up.
This condenser delivers 42,000 BTU of heating capacity — the same rating as its cooling output. In average conditions, that covers a medium-sized home. In extreme cold, heat pump efficiency drops, which is why serious off-grid builders pair a heat pump with a secondary heat source like a propane furnace or wood stove. This unit is a strong primary heating and cooling component within a layered approach. It is not marketed as a sub-zero miracle — it is a 42,000 BTU workhorse that handles the bulk of your seasonal load efficiently.
SKU: R4H5S42AKAAA Category: Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This is what you can expect from us.

Free Shipping Ships free to your door — LTL freight included on large systems, no surprise charges.
30-Day Performance Guarantee If it doesn't perform as specified, we make it right — uninstalled returns accepted within 30 days.
Free System Design Consultation Our engineers size your system for your actual consumption — no guesswork, no incompatible components.

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About aciq Heat Pump Condensers

aciq is a trusted manufacturer of premium heat pump condensers. OffGridVault is an authorized dealer offering the full aciq lineup with free delivery, price match guarantee, and expert support.

View all aciq products →

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