We rate these units exceptional. For our Energybuild project we compared structural design, manufacturing quality, timber quality, glazing options, components, efficiency comparisons and pricing as the standards for making our window choice. We received quotations from three different window manufacturers ( Rationel, Swellux and Domex) that were capable of meeting our design specifications and material choice which was Pine. We were immediately impressed with the comprehensive specifications and drawings that accompanied the Domex and Rationel quotations. Domex ,who were to fastest to respond, insisted that the each drawing be individually signed and returned if proceeding with the order. We found this to be an example of efficiency that both protected the company and the client from order error. We were also surprised with the price difference of the quotations.

1. Rationel: Did not give a U=value with the quotation and stressed that the units were standard double glazed units and not low E. The overall cost inclusive of vat was 11,858 Euro.

2. Swellux: Gave a U=value of k=2.8 which was not the most impressive and came with a price tag inclusive of vat of 13,780.20 Euro.

3. Domex: Had a U=value of k=1.1 which was extremely impressive and also came with a tilt and turn combination and air vents. We were impressed with a delivery time of 3 to 5 weeks. The overall price including vat was most impressive at 8,400 Euro.
We were shocked and surprised by such a staggering price difference and it was not difficult after comparison evaluations to choose Domex. It was a decision we did not regret. Delivery from the time of order to site was just under 4 weeks and the windows were exceptionally finished. The 4 point Winkhaus locking system was smooth and the drain system efficient. The windows and doors are in place for 12 months now and have been tested in all weather conditions coming through with flying colours. A note of caution to finish on. We imported the windows directly from Domex in Poland. we paid the money up front and had not the slightest problem in the transaction. However, had something gone wrong with breakages in transit or the like, then the whole process may have been a bit more troublesome. Sourcing materials outside of one's own domain may well be very rewarding but it does come with risks so if you don't have the bottle, then leave well enough alone.