Vent Free Features

The UVS27, Models 4030, 4036. 4040, 4046, 4085, 4090, is an unvented gas heating appliance tested and listed to the ANSI standard Z21.11.2b-2004. This ap- pliance is specifically configured to burn either Natural Gas or Propane fuel, as indicated on the metal rating plate attached to the rear shroud. The UVS27 is not fuel convertible.

The stove is shipped fully assembled and ready for installation.

The UVS27M is equipped with an SIT control for manual use only.

The UVS27R is equipped with a Honeywell control valve that allows thermostatic control, on/off switch or a remote switch (not supplied).

Both models incorporate variable regulators that al- low you to adjust burner heat output between HIGH, (28,000 BTU), and LOW, (19,500 BTU). See the Opera- tion Section for details.

The standing pilot incorporates an Oxygen Depletion System (ODS/pilot) designed to shut off the appliance if enough fresh air is not available.

Fresh Air Requirements for Combustion

and Ventilation

WARNING

This heater must have fresh air for proper opera- tion. If not, poor fuel combustion could result. Read the following instructions to insure proper fresh air for this and other fuel-burning appliances in your home.

Modern construction standards have resulted in homes that are highly energy-efficient and that allow little heat loss. Your home needs to breathe, however, and all fuel-burning appliances within it require fresh air in order to function properly and safely. Exhaust fans, clothes dryers, fireplaces, and other fuel burning appli- ances all use the air inside the building. If the available fresh air is insufficient to meet the demands of these appliances, problems can result.

The UVS27R/M Unvented heater has specific fresh air requirements. You must determine that these fresh air requirements will be met within the space where the appliance will be installed. The following informa- tion will help you insure that adequate fresh air is avail- able for the heater to function properly.

UVS27 Vent-Free Gas Heater

Provide For Adequate Ventilation

Any space within a home can be classified in the follow- ing categories:

1)Unusually Tight Construction

2)Confined Space

3)Unconfined Space

First, determine which classification defines the intend- ed space.

Unusually Tight Construction

You must provide additional fresh air if the space falls into this classification. Unusually Tight Construction is defined as construction wherein:

a.walls and ceilings exposed to the outside atmo- sphere have a continuous water vapor retarder with a rating of one perm or less with openings gasketed or sealed and

b. weather stripping has been added on openable win- dows and doors and

c. caulking or sealants are applied to areas such as joints around window and door frames, between sole plates and floors, between wall-ceiling joints, between wall panels, at penetrations for plumbing, electrical, and

gas lines, and at other openings.

If your home meets all of the three criteria above, you must provide supplemental fresh air for the appliance from outside the home as detailed on page 7, B.

If your home does not meet the above criteria, follow the procedure below.

Determine if You Have a Confined

or Unconfined Space

Use the following formula to determine if you have a confined or unconfined space.

Space is defined as the room in which you will install the heater plus any adjoining rooms with doorless pas- sageways or ventilation grilles between the rooms.

The National Fuel Gas Code ANSIZ223.1/NFPA54 defines a confined space as a space whose volume is less than 50 cubic feet per 1,000 BTU per hour, (4.8

m3 per kw), of the aggregate input rating of all appli- ances installed in that space and an unconfined space as a space whose volume is not less than 50 cubic feet per 1,000 BTU per hour, (4.8 m3 per kw), of the ag- gregate input rating of all appliances installed in that space. Rooms communicating directly with the space in which the appliances are installed, through openings not furnished with doors, are considered a part of the unconfined space.

1.Determine the volume of space, (length x width x

height). Include adjoining rooms connected by doorless passageways or ventilating grilles.

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Vermont Casting 4030 - 4049 manual Vent Free Features, Fresh Air Requirements for Combustion Ventilation
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4030 - 4049 specifications

Vermont Castings is renowned for its commitment to producing high-quality wood and gas stoves, fireplace inserts, and outdoor grills. Among their esteemed lineup, the Vermont Castings 4030 and 4049 models showcase a blend of traditional craftsmanship and modern technology, epitomizing the brand's philosophy of combining functionality with aesthetics.

The Vermont Castings 4030 is particularly celebrated for its efficiency and robust design. One of its standout features is the advanced catalyst system that allows for cleaner burning and reduced emissions. The stove operates with a specially designed catalytic combustor, enhancing the combustion process and increasing overall efficiency. This results in longer burn times and a warmer, cozier atmosphere with less frequent refueling.

The 4049 model builds upon this foundation, delivering enhanced heating capacity suitable for larger spaces. It boasts a high BTU output, ensuring that even expansive areas remain comfortably warm during the coldest months. One of the defining characteristics of the 4049 is its impressive ability to provide a long-lasting heat source, thanks to its large firebox and innovative design.

Both models feature a beautiful cast iron construction, which not only exudes an old-world charm but also allows for superior heat retention. This heavy-duty material ensures that once heated, the stoves radiate warmth over a long period, making them efficient choices for home heating.

A unique feature found in both models is the air wash system. This technology keeps the glass panel clean, allowing homeowners to enjoy the mesmerizing view of the flames without worrying about soot buildup. The stoves are also designed with adjustable airflow controls, giving users the ability to fine-tune the heat output and fuel efficiency according to their preferences.

Aesthetically, the Vermont Castings 4030 and 4049 are designed to complement a variety of home decors, featuring multiple finishes and door styles to suit individual tastes. The craftsmanship extends to decorative features, including embossed designs that add elegance to any room.

In summary, Vermont Castings 4030 and 4049 are exemplary models that embody the brand's dedication to quality. Their advanced technologies, efficient heating systems, and timeless designs make them ideal choices for homeowners seeking both functionality and beauty in their heating solutions. Whether you're looking for a reliable source of warmth or an impressive centerpiece for your living space, these stoves represent an investment in comfort and style.
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