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Monessen Aria 36" Ventless Gas Fireplace

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Introducing the Aria 36" Ventless Gas Fireplace – where elegance meets efficiency, and warmth becomes a masterpiece. Unleash the power of big, bold, and beautiful flames that effortlessly transform any space into a cozy haven. 

Designed with a commitment to clean lines and timeless aesthetics, the Aria ensures that the dancing flames become the focal point of your room, seamlessly complementing your unique decor. With an array of options and accessories, you have the freedom to tailor this fireplace to your personal style, creating an ambiance that truly reflects you.

Whether you choose the precise control of Millivolt or the advanced IPI Control, the Aria adapts to your preferences, putting you in command of the warmth and atmosphere. Powered by the revolutionary Natural Blaze Burner Technology, experience the magic of instant dancing yellow flames and an active ember bed that mimics the charm of a traditional wood-burning fireplace.

But that's not all – the Aria boasts Vent-Free Technology, ensuring that every inch of your space is infused with generous, efficient heat without the need for a chimney. Embrace the warmth without limits, as the Aria warmly welcomes you home, providing a sanctuary where style and function unite in perfect harmony. Elevate your living space with the Aria Vent Free Gas Fireplace – because every home deserves a touch of luxury and a blaze that steals the show.


  • Millivolt ignition: Low-voltage system uses pilot flame's heat to ignite gas without external power; if flame goes out, gas flow stops.
  • Intermittent Pilot Ignition (IPI): Efficient gas ignition. Sparks/glow plug lights pilot gas as needed. Saves energy, used in modern gas devices.


  • Millivot and IPI Control are the two ignition modes available.
  • The exclusive Natural Blaze Burner Technology produces instant dancing yellow flames and a bed of active embers.
  • Ventless Technology
  • Up to 37,000 BTUs
  • Black Magic glass liner for maximum flame reflection, porcelain panels, or firebrick are optional accessories.


  •  Fuel Type: Natural Gas and Liquid Propane
  •  NG BTU: 37,000
  •  LG BTU: 36,000
  •  Framing Width: 41-1/4"
  •  Framing Depth: 17-1/2"
  •  Framing Heigth: 35"
  •  Viewing Area: 36 x 21-3/4" (783 sq in)
  •  Certification: ANSI Z223.1, NFPA54 ,ANSI Z21.11


Vented vs. Ventless Gas Logs: A Comprehensive Guide

In the world of gas logs, the debate between vented and ventless logs continues to create a buzz. We're often asked: "Which is better, vented or ventless gas logs?" To answer this question, let's delve into a deeper understanding of the applications, experiences, benefits, and drawbacks associated with both types.

Vented vs. Ventless Gas Logs: The Basics

Before we weigh up the pros and cons of each, it's essential to understand the fundamental differences between vented and ventless gas logs.

Vented Gas Logs work similarly to a traditional fireplace, where the exhaust is sent up through a chimney or flue. On the other hand, Ventless Gas Logs don't require a flue or chimney, potentially saving you considerable venting costs. Though unvented, these logs are designed to burn "clean" with minimum emission ('trace amounts') of fumes into the living space.

The Contender 1: Vented Gas Logs

Vented gas logs are known for their authentic, wood-like aesthetics and the ability to produce a large, roaring fire. However, they necessitate an open chimney flue, which can turn out to be a significant heat culprit. Heat loss through the chimney can sometimes overshadow the warmth produced by the logs, but their incredible realism can make the trade-off worthwhile.

Pros and Cons of Vented Gas Logs


  • Realistic, full-bodied fire.
  • Emits a negligible amount of pollutants into living spaces.
  • Wide variety of styles and flame appearances.


  • Requires chimney or flue for ventilation.
  • This can lead to heat loss due to an open chimney.
  • Less energy efficient in comparison to its ventless counterpart.

The Contender 2: Ventless Gas Logs

Ventless gas logs are all about convenience, conserving heat, and energy efficiency. They produce a lot of heat and don't require a direct vent. However, the flames are typically less appealing and less natural-looking. They also put more moisture into the air, causing windows to fog up or a damp feeling in the home if overused.

Pros and Cons of Ventless Gas Logs


  • It doesn't require venting, enabling use in a variety of settings.
  • Higher heat output.
  • More energy-efficient.


  • Less realistic flame.
  • It may produce moisture, causing dampness when overused.
  • Certain states have restrictions on ventless gas logs for indoor use.

The Verdict

Choosing between vented and ventless gas logs depends upon individual needs, restrictions, and preferences. If you want a realistic fire, vented gas logs offer an authentic fire experience. If energy efficiency and maximum heat output are your priorities, ventless gas logs are your best bet.

So, have you made up your mind? Whether it's vented or ventless gas logs, ensure that you comply with the safety and installation guidelines for a secure and delightful fire experience.

Hearth & Home Technologies LLC


Hearth & Home Technologies LLC (“HHT”) extends the following warranty for HHT gas, wood, pellet and electric hearth appliances (each a “Product” and collectively, the “Product(s)”) and certain component parts set forth in the table below (“Component Part(s)”) that are purchased from a HHT authorized dealer or distributor.


HHT warrants that the Products and their Component Parts will be free from defects in materials and workmanship for the applicable period of Warranty coverage set forth in the table below (“Warranty Period”). If a Product or Component Parts are found to be defective in materials or workmanship during the applicable Warranty Period, HHT will, at its option, repair the applicable Component Part(s), replace the applicable Component Part(s), or refund the purchase price of the applicable Product(s). The maximum amount recoverable under this Warranty is limited to the purchase price of the Product. This Warranty is transferable from the original purchaser to subsequent owners, but the Warranty Period will not be extended in duration or expanded in coverage for any such transfer. This Warranty is subject to conditions, exclusions, and limitations as described below.


Warranty coverage begins at the date of installation. In the case of new home constructions, Warranty coverage begins on the date of first occupancy of the dwelling or six months after the sale of the Product(s) by an independent, authorized HHT dealer or distributor, whichever occurs earlier. However, the Warranty coverage shall commence no later than 24 months following the date of Product shipment from HHT, regardless of the installation or occupancy date. The term “Lifetime” in the table below is defined as: 20 years from the beginning date of warranty coverage for gas appliances, 10 years from the beginning date of warranty coverage for wood and pellet appliances, and 5 years from the beginning of warranty coverage for standalone gas log sets. These time periods reflect the minimum expected useful lives of the designated Component Parts under normal operating conditions.


  • Because HHT cannot control the quality of any Products sold by unauthorized sellers, this Warranty only covers Products that are purchased through an HHT authorized dealer or distributor unless otherwise prohibited by law; a list of HHT authorized dealers is available on the HHT branded websites.
  • This Warranty is only valid while the applicable Product remains at the site of original installation. • This Warranty is only valid in the country in which the HHT authorized dealer or distributor that sold the applicable Product is authorized to sell applicable Product.
  • Contact your installing distributor or dealer for Warranty service. If the installing dealer or distributor is unable to provide necessary parts, contact the nearest HHT authorized dealer or supplier. Additional service fees may apply if you are seeking Warranty service from a dealer other than the dealer from whom you originally purchased the applicable Product.
  • No HHT consumer should bear cost of warranty service or costs incurred while servicing warranty claims (i.e., travel, gas, or mileage) when the service is performed within the terms of this Warranty. Check with your dealer or distributor in advance for any costs to you when arranging a warranty call. Travel and shipping charges for parts are not covered by this Warranty.


This Warranty does not cover the following:

  • Changes in surface finishes as a result of normal use. As a heating appliance, some changes in color of interior and exterior surface finishes may occur. This is not a flaw and is not covered under the Warranty.
  • Damage to printed, plated, or enameled surfaces caused by fingerprints, accidents, misuse, scratches, melted items or other external sources and residues left on the plated surfaces from the use of abrasive cleaners or polishes.
  • Repair or replacement of parts that are subject to normal wear and tear during the Warranty Period are not covered. These parts include: paint, wood and pellet gaskets, firebricks, grates, flame guides, batteries and the discoloration of glass.
  • Minor expansion, contraction, or movement of certain parts causing noise. These conditions are normal and complaints related to this noise are not covered by this Warranty.
  • Damages resulting from: (1) failure to install, operate, or maintain the applicable Product in accordance with the installation instructions, operating instructions, and listing agent identification label furnished with the applicable Product; (2) failure to install the applicable Product in accordance with local building codes; (3) shipping or improper handling; (4) improper operation, abuse, misuse, continued operation with damaged, corroded or failed components, accident, or improperly/incorrectly performed repairs; (5) environmental conditions, inadequate ventilation, negative pressure, or drafting caused by tightly sealed constructions, insufficient make-up air supply, or handling devices such as exhaust fans or forced air furnaces or other such causes; (6) use of fuels other than those specified in the operation instructions; (7) installation or use of components not supplied with the applicable Product or any other components not expressly authorized and approved by HHT; (8) modification of the appliance not expressly authorized and approved by HHT in writing; and/or (9) interruptions or fluctuations of electrical power supply to the applicable Product.
  • Non-HHT venting components, hearth connections or other accessories used in conjunction with the applicable Product.
  • Any part of a pre-existing fireplace system in which an insert or a decorative gas applicable Product is installed.
  • HHT’s obligation under this Warranty does not extend to the Product’s capability to heat the desired space. Information is provided to assist the consumer and the dealer in selecting the proper Product for the application. Consideration must be given to the Product location and configuration, environmental conditions, insulation and air tightness of the structure.

This warranty is void if:

  • The applicable Product has been over-fired, operated in atmospheres contaminated by chlorine, fluorine, or other damaging chemicals. Over-firing can be identified by, but not limited to, warped plates or tubes, deformation/warping of interior cast iron structure or components, rust colored cast iron, bubbling, cracking and discoloration of steel or enamel finishes.
  • The applicable Product is subjected to prolonged periods of dampness or condensation.
  • There is any damage to the applicable Product due to water or weather damage which is the result of, but not limited to, improper chimney or venting installation.


  • EXCEPT TO THE EXTENT PROVIDED BY LAW, HHT MAKES NO EXPRESS WARRANTIES OTHER THAN THE WARRANTY SPECIFIED HEREIN. The owner’s exclusive remedy and HHT’s sole obligation under this Warranty or in contract, tort or otherwise, shall be limited to replacement of the Component Part(s), repair of the Component Part(s), or refund of the original purchase price of the applicable Product(s), as specified above; provided, however, that (i) if HHT is unable to provide replacement of the Component Part(s) and repair of the Component Part(s) is not commercially practicable or cannot be timely made, or (ii) the customer is willing to accept a refund of the purchase price of the applicable Product(s), HHT may discharge all such obligations by refunding the purchase price of the applicable Product. In no event will HHT be liable for any incidental or consequential damages caused by defects in the applicable Product. Some States do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This Warranty gives you specific legal rights and you may also have other rights which vary from State to State. THE DURATION OF ANY IMPLIED WARRANTY IS LIMITED TO DURATION OF THE EXPRESSED WARRANTY SPECIFIED ABOVE FOR THE APPLICABLE PRODUCT. Some States do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Last updated on February 11th 2024.



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