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Vent-Axia

Tool 2 - Online Sizing Guide for Underfloor Heating Products

Products Applicable
- Electric underfloor heating

The electric underfloor heating sizing and quotation tool will provide you with a product selection for our electric underfloor heating mats, thermostatic controllers and insulation boards, the tool will also email you a trade priced pdf quotation. The whole process should take no longer than a couple of minutes.

Quotation and sizing tool

There is some basic information you will need in order to complete the selection and quotation such as the room size and floor construction and floor covering planned.

We have also included a comprehensive four step guide to give you more information on how to measure your room and select the appropriate product for your project.

Calculating your requirements

Step 1 - Measuring up
Step 2 - Unheated areas
Step 3 - Heated areas
Step 4 - Product Selection and Sizing
Typical product selections

Calculating your requirements

Step 1 - Measuring up
Step 2 - Unheated areas
Step 3 - Heated areas
Step 4 - Product Selection and Sizing

How to Measure up


Quotation and sizing tool

Step 1. - Calculating Total Area


Measure the length and width of your room, In this example the bathroom is 3m x 4m giving a total of 12m2 .

Total Area

Width 3m
Length 4m
Total Area 12m2

Step 2. - Calculating Unheated Areas

Quotation and sizing tool


When installing underfloor heating you have to ensure that the heat can escape into the room. When calculating the heated area we deduct any fixed furniture such as kitchen cupboards. In this example we will deduct the bath, basin, shower tray toilet and cupboard, the unheated area.

Total Unheated Area

Bath 1.4m2
Sink and toilet 1m2
Shower and Cupboard 1.7m
Total Unheated Area 4.1m2

Step 3 - Calculating heated Areas

Quotation and sizing tool


The heated area is calculated by taking the unheated areas away
from the total area. In this case:

Total heated Area

Total Area 12m2
Total Unheated Area 4.1m2
Total Heated Area 7.9m2

Step 4. - Product Selection and Sizing

Quotation and sizing tool


Mats are selected at 90% of the total heated area allowing room for the required spacing around the perimeter of the room and between the mat on it's return.

In this example the area is 7.1m2 for mat installation, rounded down to the nearest kit size of 7m2.

Insulation boards - 110% of the total heated area requirement due to the wastage when cutting.

Product Selection

Mat Area selection 7.1m2
Insulation Board Area Selection 8.7m2

The application guide below shows the typical product choice for differing rooms and locations.

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Vent-Axia are leading manufacturers and suppliers of heating, ventilation and air conditioning systems, both in the UK and around the world. For over 75 years, we have led the industry in air ventilation products, systems and services. Whatever your requirement, budget or setting, Vent-Axia can provide the solution you need. From extraction fans for the home to large commercial ventilation solutions, our wide HVAC range features a product for every air handling purpose.

Vent-Axia's popular Lo Carbon range combines all the style and durability you expect from a Vent-Axia product with even greater energy efficiency, helping you to make your property as eco friendly as possible. Together with the Lo Carbon range, demand energy recovery ventilation and heat recovery (HRV) and mechanical extract systems are also available to aid new sustainable building projects to adhere to the Code for Sustainable Homes.

In combination with our exceptional ventilation product range we also offer a comprehensive range of heating products ideal to heat your home, our range of electric heating includes, storage heaters and combination storage heaters,  panel heaters, towel rails, portable heating, fan heaters, convector heaters and radiant heating.  Our latest product introduction brings electric underfloor heating to the portfolio, this range consists of electric underfloor heating mats, underfloor heating thermostats, underfloor heating kits and underfloor heating insulation boards to offer a comprehensive solution.

In addition to our ever-growing domestic and commercial ventilation ranges, Vent-Axia also supply air curtains, hand dryer products and fume handling/smoke fans. We can also support your air conditioning requirements.

Vent-Axia products are available from distributors around the UK and Eire and also around the world via our network of international distributors. Many of our ranges can also be ordered via our online store. Browse our full range of heating, ventilation and air conditioning products by clicking here. You can also contact us for any further enquiries.