Add to cart
ACiQ 110,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace ACiQ 110,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace $1,057.95
aciq

ACiQ 44,000 BTU Gas Furnace — 35,200 BTU Output, Multi-Positional Install

Reliable Heat for Your Off-Grid Build

35,200 BTUs output — Consistent heat through cold months
Multi-positional install — Upflow, downflow, or horizontal
18-speed ECM blower — Quiet, consistent airflow control
Dual fuel capable — Natural gas or propane ready
Onboard self-diagnostics — Fast troubleshooting, less downtime
  • FREE Shipping -- LTL freight delivery included on every order
  • 30-Day Performance Guarantee -- Uninstalled returns accepted if specs are not met
  • FREE Consultation -- We help you confirm the right BTU sizing for your space

Price range: $782.95 through $824.95

Add to Cart
ACiQ 44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
$782.95 – $824.95Price range: $782.95 through $824.95

30-day money back · No restocking fee

🔒 100% Secure Checkout

Visa Mastercard American Express Apple Pay Google Pay Klarna Link by Stripe
Free Returns 30-day hassle-free returns.
Free Delivery Every order, every time.
Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • ACiQ 44,000 BTU gas furnace unit
ACiQ 44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace
ACiQ 44,000 BTU Gas Furnace — 35,200 BTU Output, Multi-Positional Install
$782.95 – $824.95Price range: $782.95 through $824.95

Reliable Heat for Your Off-Grid Build

The ACiQ 44,000 BTU 80% AFUE furnace delivers 35,200 BTUs of output heat through a single-stage burner paired with an 18-speed constant torque ECM blower motor. Its multi-positional design—upflow, downflow, or horizontal—gives you real flexibility when building an off-grid or grid-independent heating system. Field-tested for dependable cold-weather operation, this unit includes onboard self-diagnostics for straightforward troubleshooting. Runs on natural gas out of the box, with propane conversion available via a separate kit. Ships free. Finance with Affirm — pay as low as $26/month on approved credit.

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
Multi-Positional Install
35,200 BTU Output
18-Speed ECM Blower
Onboard Diagnostics
44,000 BTU
Heating Input
80% AFUE
Fuel Efficiency
108 lbs
Unit Weight
Heat That Shows Up When Temperatures Drop

Heat That Shows Up When Temperatures Drop

A furnace that quits during a cold snap is not just inconvenient — it is dangerous. Off Grid Vault vets every product for real-world reliability before it earns a spot in our catalog. The ACiQ 44,000 BTU unit uses a silicon nitride hot surface ignitor, chosen for proven durability over repeated ignition cycles. The single-stage burner fires consistently at 44,000 BTU input, converting 80% into 35,200 BTUs of usable heat. No guessing whether it will start when you need it. This is the kind of straightforward, field-tested heating equipment we would install on our own property.

Install It Your Way — Not Just One Way

Install It Your Way — Not Just One Way

Not every home layout accommodates a standard upflow furnace. This ACiQ unit supports upflow, downflow, and horizontal configurations, giving you real options depending on your mechanical room, crawlspace, or attic setup. The cabinet fits 14-inch or 17.5-inch widths, and the direct-drive 18-speed ECM blower operates at 1075 RPM on a .33 HP motor drawing no more than 15 amps. That means straightforward electrical integration without requiring a dedicated circuit upgrade. Whether you are heating a small cabin, a workshop, or a remote home, the installation flexibility eliminates the need to redesign your space around your furnace.

Self-Diagnostics Cut Downtime to Minutes

Self-Diagnostics Cut Downtime to Minutes

When a furnace goes dark in January, waiting days for a service technician is not acceptable. The ACiQ 44,000 BTU unit includes onboard self-diagnostics that report fault codes directly, so you or your installer can identify the issue without trial-and-error parts swapping. The direct ignition system with silicon nitride hot surface ignitor removes the pilot light as a failure point entirely. Fueled by natural gas out of the box — with propane available via a separate field conversion kit — this furnace keeps your heat source simple and serviceable. At 108 lbs, it is manageable for a two-person install without requiring a crane or special equipment.

Is This Furnace Right for Your Setup?

Confirm these compatibility points before purchasing for a clean installation.

  • Your venting system uses metal flue (PVC not compatible at 80% AFUE)
  • Your electrical panel supports a 15-amp breaker for this unit
  • Your heating load falls within 35,200 BTU output capacity

Where This Furnace Performs

Built for small-footprint heating in demanding environments.

Remote Cabin Heat
Off-Grid Homestead
Workshop & Outbuilding

Full specifications

At a glance

Dimensions
14", 17.5"
Power
.33 HP
Warranty
See product page
Full specifications15 data points across 4 categories

Dimensions

Cabinet Width14", 17.5"
Weight108.00 lbs

Power & Performance

Heating BTU44,000
Furnace Efficiency / AFUE80%
Blower MotorMulti 18-Speed Constant Torque (MCT) ECM Motor
Drive TypeDirect
Motor RPM1075
Horsepower.33 HP
Exhaust Flue RequirementMetal
Max Breaker Size15 Amps
Connection1/2" NPT
Maximum Inlet Pressure13.6"wc
ConfigurationUpflow/Downflow/Horizontal

Materials

Cabinet ConstructionSee product page

Compliance & Warranty

Warranty DetailsSee product page

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This furnace is no exception.

Free ShippingShips free to your door — no minimums, no thresholds, no fine print.
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 help you size your heating system for your actual space and climate — no guesswork.
★★★★★
“I installed this in my 900 sq ft cabin in northern Arizona last November. Heats the place evenly, the ECM blower is noticeably quieter than my old unit, and the onboard diagnostics saved me a service call when I had a flame sensor issue I could fix myself. Built-to-survive construction for the price. Runs on propane after the conversion kit.”
D
Dale L.Flagstaff, AZ

44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

The ACiQ 44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace is an affordable furnace option designed to provide reliable comfort for your home. With a basic efficiency rating, it is capable of adequately heating your space even during the coldest parts of the year. This model features a 44,000 BTU input and operates at 80% AFUE (Annual Fuel Utilization Efficiency), meaning 80% of the fuel consumed is converted into usable heat while 20% is lost through the flue and standard furnace operations. This results in an output of 35,200 BTUs. As an 80% efficiency furnace, it requires metal flue venting; if you prefer PVC or plastic venting, a furnace rated at 90% or higher efficiency is needed.

The ACiQ 44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace is typically suitable for small homes in ideal conditions and offers flexible installation options. Its multi-positional design allows it to be installed in upflow, downflow, or horizontal configurations, enhancing its adaptability for various home layouts. It includes a single-stage burner paired with a multi-speed blower to maintain consistent indoor temperatures. The furnace also features onboard self-diagnostics for easy troubleshooting and maintenance.

While this unit comes configured for natural gas, it can be field-converted to propane with an optional LP conversion kit, available separately. However, it is important to note that the N80MSN0451412A is not Low NOx or Ultra Low NOx compliant. If shipping to California, a mitigation fee may apply. Additionally, this model is not designed for use in mobile homes unless specified otherwise. Its durable outer casing ensures long-lasting performance, offering dependable comfort for years to come.

This gas appliance must be installed by a trained and qualified technician. Incorrect installation of gas lines, flue connections, or venting can lead to serious injury or even death. By purchasing this unit, you confirm that a trained professional will be responsible for the installation. We are not liable for any personal injury or property damage resulting from improper installation or service. The individual performing the installation or maintenance assumes full responsibility for any associated risks. Please note that many local jurisdictions require a licensed professional to install this type of equipment.


44,000 BTU 80% AFUE Single Stage Multi-Positional Gas Furnace

ACiQ 44,000 BTU 80% Gas Furnace Specs

  • Weight: 108.00 lbs
  • Exhaust Flue Requirement: Metal
  • Furnace Efficiency / AFUE: 80%
  • Heating BTU: 44,000
  • Blower Motor: Multi 18-Speed Constant Torque (MCT) ECM Motor
  • Drive Type: Direct
  • Motor RPM: 1075
  • Horsepower: .33 HP
  • Configuration: Upflow/Downflow/Horizontal
  • Max Breaker Size: 15 Amps
  • Connection: 1/2″ NPT
  • Maximum Inlet Pressure: 13.6″wc
  • Burner Stages: Single
  • Ignition Type: Direct Ignition with Silicon Nitride Hot Surface Ignitor
  • Fuel Type: Propane, Natural Gas
  • Certification: AHRI Certified
  • Dimensions: 33 1/3″ H x 14 3/16″ OR 17 1/2″ W x 29″ D


ACiQ 44,000 BTU 80% Gas Furnace Specs

  • 44,000 BTU input, delivering approximately 35,200 BTU output at 80% efficiency.
  • 80% AFUE, meaning 80% of the fuel is converted into usable heat.
  • Multi 18-Speed Constant Torque (MCT) ECM motor for enhanced airflow control.
  • Designed for upflow, downflow, or horizontal installations.
  • Direct ignition with a silicon nitride hot surface ignitor for reliable starts.
  • Natural gas, with an optional LP conversion kit available for propane use.
  • Requires metal flue venting; not compatible with PVC venting.
  • Onboard self-diagnostics for easier maintenance and troubleshooting.


Your Satisfaction with ACiQ is Guaranteed:

  • 20 Year Heat Exchanger and 10 Year Parts with Online Registration
  • Lowest Price Guarantee

Additional information

Cabinet Width

14", 17.5"

Reviews

There are no reviews yet.

Be the first to review “ACiQ 44,000 BTU Gas Furnace — 35,200 BTU Output, Multi-Positional Install”

Your email address will not be published. Required fields are marked *

Frequently Asked Questions

For a small home or cabin in a moderate climate, the math is straightforward. A 90%+ AFUE furnace costs significantly more upfront and requires PVC venting, which adds installation complexity. If your heating load aligns with 35,200 BTUs of output, this 80% AFUE unit delivers reliable heat at a lower purchase price. The fuel cost difference between 80% and 90% efficiency on a small heating load often takes years to recoup through savings alone. For properties where the heating season is shorter or the space is modest, this furnace respects your investment without overcomplicating the setup.
Off Grid Vault evaluates every product for build quality and real-world performance before listing it. When you buy from us, you get a 30-day performance guarantee — if the unit does not perform as specified, we make it right. We also provide post-purchase support from people who understand heating equipment, not a generic returns queue. Free shipping is included on every order, including the LTL freight delivery this 108 lb furnace requires. No surprise charges at checkout.
Heating requirements depend on your square footage, insulation quality, ceiling height, climate zone, and window area. A rough reference: in a well-insulated home in a moderate climate, 35,200 BTUs of output can heat approximately 800–1,100 square feet. In colder climates or poorly insulated structures, that coverage drops. For an accurate sizing calculation, contact us for a free consultation — we will help you determine the right BTU capacity for your specific situation rather than guessing.
For a qualified installer, a straightforward replacement in an existing configuration typically takes 4–6 hours. A new installation where ductwork and gas lines need to be run will take longer, often a full day. The multi-positional design helps reduce complexity since the unit adapts to your existing layout rather than forcing you to reconfigure around it. The 108 lb weight is manageable for two people, and the 15-amp max breaker requirement means most standard circuits can accommodate it.
Warranty terms are set by the manufacturer and vary by model year and registration. We are an authorized dealer, which means warranty claims go through us — not through a faceless ticket queue. If a component fails under the manufacturer's warranty period, we handle the claim directly. For the first 30 days, our own performance guarantee applies: if the unit does not perform as specified and is uninstalled in original packaging, we will make it right. Contact us for the exact warranty terms on current inventory.
At 80% AFUE, this furnace requires metal flue venting. The 20% of fuel energy not converted to heat exits through the flue at temperatures that demand metal pipe — PVC or plastic venting will not hold up. If your existing setup uses PVC venting, or if you prefer PVC for installation simplicity, you need a 90%+ AFUE condensing furnace instead. This is a straightforward specification, not a limitation — just match the venting material to the furnace efficiency rating.
SKU: N80MSN0451412A Category: Brand:

The Off Grid Vault Promise

Every product we carry is vetted for real-world performance. This furnace is no exception.

Free Shipping Ships free to your door — no minimums, no thresholds, no fine print.
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 help you size your heating system for your actual space and climate — no guesswork.

Related products

About aciq Furnaces

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

View all aciq products →

Related Categories

AC/DC Enclosure 2 products Air Handlers 8 products Air Heaters 2 products Amp Hub 2 products Awnings 15 products Batteries 3 products
Join the Grill Island Community

Expert Picks, Straight to Your Inbox

No spam. Just the gear worth knowing about.

No spam. Unsubscribe anytime.