In April this year we had your company install a Sola Tube Roof ventilator for us. Prior to installing the ventilator the upstairs part of our house was extremely hot in summer and that is why we arranged for you to install the ventilator. After installation you asked us to comment on the difference but we thought in would be best to wait until summer came to evaluate the effect. We are pleased to report that the Sola Tube ventilator has made a significant difference. Previously on a really hot day the heat upstairs would hit you as soon as you go up. Now there is not that shock of the heat. For the money spent it has been money well spent. The unit we installed was the 15watt rather than the 10 watt and this has delivered the results.