Technical Help

Technical Help
Choosing the perfect fire and fireplace can be a tricky affair.

We are at hand to give you as much technical advice as we can over the phone but it is much more useful to pop in with any ideas, dimensions, photos or plans etc.
It would be more advisable to make an appointment with our in house Technical Advisor or he can make a site visit.
Even though we can generally overcome any scenarios, options, problematic situations in theory - it is still necessary to have a site survey carried out by a competent installer prior to installation.
This can be arranged on your behalf, just go to the Contact Us page and request either a showroom appointment, a survey or more info/brochures etc.

The main consideration when choosing a gas fire will be the compatibility with your existing flue provision. Whether your property has a flue, chimney or none at all, although it is still possible to purchase a fire for all of these situations.

We have therefore provided the following information to explain the different flue types and alternatives available to you. However whilst the pictures and information below may be of help to you, they are in no way a substitute for having an on site professional survey carried out by a Gas Safe or HETAS registered installer which we strongly recommend. This should be done in all cases to check the compatibility of your chimney or flue with the type of appliance you intend to purchase, prior to making any final decision to avoid disappointment and additional unforeseen expense, which we cannot accept, any liability for on your behalf.

Brick Chimney ( Class 1 application )
A brick chimney is easily recognised by a chimney stack, with either a pot or gas terminal on your roof, which relies on the natural circulation of air through the room and up your chimney to expel the products of combustion. The minimum internal diameter will be 7" and it may have had a real solid fuel fire in previously, especially in the case of older properties sometimes identifiable by an existing chairbrick at the back of the fire opening.
If you have a chimney you will be pleased to know that you will be able to have most types of gas , electric or Solid Fuel appliances installed.

Pre Fabricated flues ( Class 1 & 2 applications)
These are usually a metal interlocking single or twin wall flue pipe connected to a flue box, with a gas terminal on your roof. Creating the same circulation of air as a chimney. A flue pipe with a minimum internal diameter of 7" or more is recognised as a class 1 flue and a flue pipe of less than 7" generally around 5" internal diameter is recognised as a class 2 flue.
Again there is both a large selection of gas appliances for class 1 & 2 applications available, dependant on the size of flue and flue box you have in your property.

Precast Flue ( Class 2 application)
This flue is manufactured into rectangular hollow concrete or clay blocks that travel vertically, up through the cavity wall of your property, to a ridge vent or metal flue terminal on the roof. These flues tend to be very shallow in depth, although suitable deeper appliances may be able to be installed with the use of either a spacer kit or deeper rebate on the fireplace.

Power flue (No chimney application)
A power flue is an open fronted gas appliance with an electronically driven fan system either semi recessed or surface mounted on the outside of the wall to expel the flue gases and as such a sound is to be experienced when the fan is turned on. When the fire is not in use, some natural air circulation may occur through the flue terminal, which is quite normal. Paragon Fires however have developed a unique system which stops air travelling in through the fan when the fire is off.
There are two types of power flue options available, a rear flue or side flue for left and right applications in instances where it is not possible to rear flue through the chosen wall (conditions apply). It may also be possible to install a deep power flue gas fire for added realism, subject to the depth of rebate on a surround if applicable or if installed with a spacer kit where available.

Balanced Flue ( No chimney application )
A balanced flue is a glass fronted gas appliance, which is completely sealed from the room into which they are installed and vents directly to an outside wall. Air is drawn in from the outside for combustion purposes increasing its efficiency through an outer pipe whilst the inner pipe vents the combustion gases safely away to the outside of the property.
There is no electric supply required; hence no sound or natural air circulation is experienced as with a power flue appliance. There is also a choice of either outset or inset versions available.

Flueless appliances have been around for some time and incorporate the latest in gas fire technology using a catalytic converter which the combustion gases pass through converting all harmful gases into carbon dioxide and water vapour. The result is an appliance, which is 100% efficient with low running costs.
Flueless appliances can be easily installed into most rooms providing there is a gas supply, excluding bedrooms & bathrooms and the room meets the minimum size and ventilation requirements. There is a choice of both free standing and inset models available.



I would just like to convey my gratitude to your fitters for installing my beautiful fireplace. I greatly appreciated the time and advice I was given on my first visit to the showroom. Following this visit the professional service and installation of the fireplace.

Thank you very much, I am so delighted and continue to suggest that anyone considering a new fireplace, should visit 'Gasco' first and will find they will need to go nowhere else, just make their choice and order it.

B M, Yeovil, Somerset