Pawan, The function you are describing is of a Awning Window. Yes , you can still have an exhaust. You need to get an opening cut according to size of your exhaust and mount it on the top part. You have described it as being made of cardboard. It doesn't look like a cardboard though. If it is indeed a cardboard then mounting an exhaust on it may not be durable. Use UPVC or Alum composite sheet. Changing the top part to Awning may still be feasible. But you will need some local help. Thanks, Nitin Cornerstone Designs, Bangalore.

Steel - it is heavy but most durable option but it is costly and may catch rust in a few years, However, you can treat it with chemicals to protect it from rusting.Heating capacity is fast. Aluminium/UPVC - Its light weight and durable, it is cheap but very bad against fire. UPVC would burn in seconds if it happens to catch fire. UPVC windows come with limited color options and same with aluminium ones. However, there are few companies who have now started providing wood looking UPVC windows.Moderately resistant to heat. Wood - Wood windows look very rich and you can mould it to any intricate details. It all depends on the quality of wood used, Old Burma Teak is the best wood. You get various options with polishing and painting. They are best to give a vintage look. Wood will cost you more but its worth the investment since they are maintenance free and with right wood chosen and treated, it will remain durable for years. Resistant to heat but catches fire. If you liked our suggestion, do write a kind review on our profile. It will help :) Thanks, Smit Bhagat

UPVC windows are great option as compared to aluminium or wood. Choose a good brand and not much of a difference is present in the quality of top 3 upvc vendors. Apart from fenesta, other brands are Encraft, Kommerling & Aparna. I have used Encraft in my house. Take care of window Grill design so that you are able to operate windows

Hello I am planning on installing UPVC windows one one Upvc door for my house. Could you recommend any good services in north Bangalore. Thanks.