Underfloor hydronic floor heating – G1 Distribution import and wholesale a full range of material for Hydronic (liquid) heating systems across Southern Africa. Hydronic heating systems are the most popular and cost-effective radiant heating systems one can invest in. Hydronic radiant floor systems pump heated water from a source through tubing laid in a pattern under the floor.

Underfloor heating uses the floor surface within a home as a heat emitter.

Hot water pipework loops are embedded into the floor construction as part of the ‘wet’ central heating system.

Due to the large surface area of the emitter, water can be circulated through the distribution system at a relatively low temperature (around 40°C)

A larger proportion of the heat emitted through underfloor heating is utilised to provide warmth to people directly and relatively less heat is used to warm the air first.

Underfloor heating loops should have no joints, with all connections for maintenance located above the floor finish at the manifolds, making the installation relatively robust against leaks.

Underfloor heating requires hot water input at relatively low temperatures from the main heat source, typically 35 to 45°C. This can be achieved either at source or externally through mixing valves. 

Gas or oil boilers specified in new homes are of the condensing type. A condensing boiler has a large (or a second) heat exchanger, to recover heat that would otherwise be wasted in the flue gases. This improves the overall fuel efficiency of the boiler. The benefit from this heat recovery is maximised when the temperature of the water returning to the boiler is low as is the case with underfloor heating. 

Heat pumps take heat from a relatively low temperature source such as outside air, the ground or a water body, and convert it to a higher temperature, generally using electricity. Their efficiency is measured by the ratio of heat output to the power needed to drive the entire process, called its Coefficient of Performance (COP). The COP of a heat pump is higher when the difference in temperature between the heat source and the heat supply is low. This makes heat pumps particularly suitable for use with underfloor heating, where the supply temperatures are low.

Underfloor hydronic floor heating is the way to go.

The pipe, fittings and materials that G1 offer to this industry uses low-temperature water to heat the floor, objects, and people, and the heat can be adjusted from one room to another.

The material G1 offers to the market can hook-up to various heat sources. Heating source can include solar panels, gas burners, oil burners, heat pumps, and so forth.

The picture below will indicate what to expect what is in the box. This will be the underfloor heating manifold and parts. The actuator is also available from us but is excluded from the box.

Typical Underfloor heating design.

underfloor heating plan
Installation Diagram

The picture below indicates what you will buy from us as a complete underfloor manifold. The price for a manifold includes all these parts in the picture for the underfloor manifold.   

underfloor heating

G1 Distribution also offer as a one stop order shop EVOH Pex pipe for your underfloor installations. Our EVOH pipe carrier’s International certification. The size of the EVOH Pex pipe is 16 mm outside diameter with an inside of 12 mm.

The EVOH underfloor heating Pex pipe is available from us in 240 meter rolls.  

Underfloor heatingpipe
Scroll to Top