AIR FOR COMBUSTION AND VENTILATION

Continued

6

DETERMINING AIR FLOW FOR HEATER LOCATION

Determining if You Have a Confined or Unconfined Space

Use this work sheet to determine if you have a confined or unconfined space.

Space: Includes the room in which you will install heater plus any adjoining rooms with doorless passageways or ventilation grills between the rooms.

1. Determine the volume of the space (length x width x height).

Length x Width x Height =

___________________

cu. ft. (volume of space)

Example: Space size 20 ft. (length) x 16 ft. (width) x 8 ft. (ceiling height) = 2560 cu. ft. (volume of space)

If additional ventilation to adjoining room is supplied with grills or openings, add the volume of these rooms to the total volume of the space.

2. Divide the space volume by 50 cubic feet to determine the maximum Btu/Hr the space can support.

____________ (volume of space) ÷ 50 cu. ft. = (Maximum Btu/Hr the space can support)

Example: 2560 cu. ft. (volume of space) ÷ 50 cu. ft. = 51.2 or 51,200 (maximum Btu/Hr the space can support)

3. Add the Btu/Hr of all fuel burning appliances in the space.

Vent-free heater

 

___________________ Btu/Hr

Gas water heater*

 

___________________ Btu/Hr

Gas furnace

 

___________________ Btu/Hr

Vented gas heater

 

___________________ Btu/Hr

Gas fireplace logs

 

___________________ Btu/Hr

Other gas appliances*

+ ___________________ Btu/Hr

Total

= ___________________ Btu/Hr

Example: Gas water heater

 

40,000

Btu/Hr

Vent-free heater

+

 

33,000

Btu/Hr

Total

=

73,000

Btu/Hr

*Do not include direct-vent gas appliances. Direct-vent draws combustion air from the outdoors and vents to the outdoors.

4.Compare the maximum Btu/Hr the space can support with the actual amount of Btu/Hr used.

_________________

Btu/Hr (maximum the space can support)

_________________

Btu/Hr (actual amount of Btu/Hr used)

Example: 51,200

Btu/Hr (maximum the space can support)

73,000

Btu/Hr (actual amount of Btu/Hr used)

The space in the above example is a confined space because the actual Btu/Hr used is more than the maximum Btu/Hr the space can support. You must provide additional fresh air. Your options are as follows:

A.Rework worksheet, adding the space of an adjoining room. If the extra space provides an unconfined space, remove door to adjoining room or add ventilation grills between rooms. See Ventilation Air From Inside Building, page 7.

B.Vent room directly to the outdoors. See Ventilation Air From Outdoors, page 7.

C.Install a lower Btu/Hr heater, if lower Btu/Hr size makes room unconfined.

If the actual Btu/Hr used is less than the maximum Btu/Hr the space can support, the space is an uncon- fined space. You will need no additional fresh air ventilation.

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Vanguard Heating VS24PR Determining AIR Flow for Heater Location, Determining if You Have a Confined or Unconfined Space
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VS18PR, VS30PR, VS24PR specifications

Vanguard Heating offers a range of high-performance heating solutions, including the VS30PR, VS18PR, and VS24PR models. Each unit is engineered to deliver exceptional efficiency and reliability for both residential and commercial heating needs.

The VS30PR model is designed for medium-sized spaces, delivering up to 30,000 BTUs. Its compact design makes it an excellent choice for both homes and businesses where space is at a premium. The VS30PR is equipped with advanced modulating technology, allowing it to adjust its heating output based on the current demand, which significantly enhances energy efficiency. One of its key features is the electronic ignition system that eliminates the need for a standing pilot light, thus enhancing safety and reducing gas consumption.

On the other hand, the VS18PR model is tailored for smaller applications, providing a heating output of up to 18,000 BTUs. This model excels in energy conservation, having earned high efficiency ratings. It includes an integrated fan system that ensures uniform heat distribution throughout the space, mitigating cold spots and enhancing comfort. The VS18PR is ideal for homes with limited heating requirements or smaller commercial spaces. Its durable construction and reliable operation make it a popular choice for those seeking a dependable heating solution without unnecessary excess.

The VS24PR model offers a balanced option for larger areas with a heating capacity of up to 24,000 BTUs. It features dual fuel options, allowing users to switch between natural gas and propane, providing versatility depending on the available fuel source. The VS24PR also includes advanced control systems that allow for programmable settings, enabling users to optimize their heating schedules based on their lifestyle and preferences. An outstanding feature of this model is its compatibility with smart home systems, allowing for remote monitoring and control via smartphone applications.

Overall, Vanguard Heating’s VS30PR, VS18PR, and VS24PR models embody the brand’s commitment to quality, efficiency, and customer satisfaction. Each model incorporates innovative technologies that cater to varying heating needs, ensuring users can find an appropriate solution for their specific requirements. With robust designs and advanced features, these units not only enhance comfort but also contribute to reduced energy costs. Whether for a cozy home setting or a bustling commercial environment, Vanguard Heating’s offerings stand out for their performance and reliability.
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