Welcome to a new way to approach Underfloor Heating Design
At Freedom Heat Pumps we have spent the past 8 years perfecting the art of heat pump specification and assistance with installation.
This has included, among lots of other things, selecting the correct cylinder to get the most out of our heat pumps, or perhaps advising on components which will work best with the installation. One aspect of the heat pump heating system which always fell outside of our remit was the underfloor heating.
IN 2018 WE ARE CHANGING THIS
If you are looking for an underfloor design which we guarantee will have the heat pump at the centre of the system design, instead of as an add on, come and talk to us at Freedom HP
Our brass manifolds are made in Germany, and supplied to us by Watts Industries. This premium product has individual flow meters, isolation ball valves, and is fitted with an auto air vent and pressure gauge to aid testing.
The heart of any underfloor heating system is the pipe. At Freedom we supply a high quality 16x2mm multilayer pipe, consisting of 5 layers of polyethylene, adhesive and aluminium. Typically rated at 95 deg c at 10bar, this strong flexible pipe is well suited to underfloor heating, and is manufactured within the EU.
At Freedom we provide a wide range of controls manufactured by leading brands such as Heatmiser, Danfoss and Reliance. On offer are basic dial thermostats to the latest digital phone app controlled products.
Our plate system is generally used for a suspended floor. Insulation should be fixed flush with the top of the existing joists to prevent downward heat loss. Battens are fixed at 400mm centres at 90° to the existing joists. Aluminum trays are then layed and stapled into position and the underfloor heating pipe is pressed into the grooves within the trays.
The pipe warms the trays and the heat is spread across the floor. Chipboard or plywood can then be layed and fixed to the battens.
Overlay panels provide many advantages over other insulation products when used with warm water underfloor heating systems. The panel dimensions are 1250 x 350 x either 20mm or 25mm.
• These panels have a thermal conductivity of 0.033W/mK
• Compressive strength 250 kPa at 10% compression
• Fire classification of Euroclass E
The Screed System is where the underfloor heating pipes are incorporated within the solid floor structure. Interlocking cliprail or castellation mats are fixed directly on to the floor insulation. The Underfloor heating pipe is pushed in to the cliprail and pinned with plastic pipe staples.
Premium End Set
Pump / Mixer Pack
Freedom Underfloor Heating quotations are unique.
We use custom online software to create a live quotation where you, as the customer, can start a discussion and alter quantities of kit directly on the quote! FHP can then reply directly to the quotation.
All your underfloor heating quotations are held in one space, so you can access them all with one click, instead of searching through emails. If you like to have a PDF version for offline viewing, then, when we email you with your unique link you also receive a PDF version attached.
Quotations are provided without obligation, and a fully insured BS1264 compliant AutoCAD pipe layout can be prepared prior to delivery and installation. This affords the client an opportunity to approve our suggestions prior to final acceptance.
With early systems developed by the Romans, the concept of underfloor heating is not new. Today, modern underfloor heating systems are becoming increasingly popular and remove the need for bulky wall mounted radiators. In simple terms, a strong flexible pipe is laid within a floor in a series of loops or circuits, without any joints. These loops are then coupled to a manifold sited centrally above ground. The manifold is then connected to the overall heating system. Warm water is then passed through the pipe and the floor becomes a low surface temperature radiator, thus heating the room.
OPERATION AND USE
It is generally accepted that underfloor heating systems run most effectively when they are left on for long periods and the thermostats are allowed to provide control. As a rule underfloor heating provides a gentle heat, and any thermostat adjustments should be small, i.e. a couple of degrees around the set point. Each room thermostat needs to be individually set. A good starting point is 20°c. If after the system has been running for a few hours a room or zone is either too warm or too cold adjust the relevant thermostat by 1 or 2 degrees. Where digital programmable thermostats are fitted, try to ensure that the set temperatures are within a close range of each other, e.g. 21°c daytime and 16-18°c night. Different rooms and or zones will have different heat requirements and it is therefore likely that the thermostat settings will vary.
WHAT TO EXPECT
It is normal for there to be some temperature variations across the floor space. The practicalities of building can mean that there will be variations in screed depth, insulation and resistance in the floor finish.These factors will all produce slight temperature differences. Areas with the highest heat loss will also cool down more quickly than those with a lower heat loss, again causing a slight variation in room and floor temperature. Thermostats are not precision instruments and whilst they will control the heating their readings and settings may not be exact. As previously mentioned different rooms have different heating requirements, and some rooms with more external wall space can be expected to feel colder than internal rooms. Thermostat temperature settings should be varied to compensate, i.e. set slightly higher for colder rooms. Please note that setting thermostats too high, and or continually adjusting the temperature settings, as well as turning the system on and off, will create uneven floor temperatures with hot and cold spots.
There are many misconceptions about what floor surface temperature to expect. It is important to note that an underfloor system is designed to heat the room space not the floor, and it can arise that the floor can feel cool to touch if the room is at design temperature. Due to the fact that underfloor heating runs at lower temperatures than conventional radiator systems, a floor surface temperature is generally only a few degrees above the ambient room temperature, e.g. room 21°c floor 24°c when running. The floor covering will also have an effect on the floor temperature and heat output.