Need to make sure the humidity levels in the home are between 40% - 60% year round.

Effectiveness is influenced by capacity of unit. If you are trying to mount a 270 cfm fan more than 30" above cooktop, then it may make noise but will do little to clear the air. If it is 1000 cfm, then it can be higher than 30". So the answer is "it depends". Most people don't mount them more than 36" above the cooktop unless it is a really high powered unit.

Sophie, Patricia you are right cleaning the crystals would be a hell of a job. Hence I would like to look at designs like the other pic I attached which is I believe from the e.ion range of Falmec. As I have mentioned before this is a second chimney. The primary chimney hood is above my gas job in the kitchen countertop and is the main and daily area for cooking. This is the secondary area which I plan to use for some quick heating, occasional stir fry etc. The pendant chimneys that I have come across in brands like Elica and Falmec do not require ducting. The filter needs to be changed every 6 months or more. With my kind of usage I am assuming I would need to change it even later. What I am looking for is different brands which have pendant chimneys. Right now I am only aware of Elica and Falmec. I know Siemens and Bosch don't have it. Siemens has 2 models which are like a flat rectangular panel to be attached to the ceiling or false ceiling. But the cost is same as the Falmec chimney. My only respite may be the cylindrical Isola chimney models from Faber or even Hafele which are ip within budget.

Dear Sir/Ma’am, Hope this message finds you well. Greetings from “PRE-DM CONSTRUCTION & INTERIOR” Designed and Installed to perfection Modular Kitchens Wardrobes Turn key interiors Living, dining & bedroom design Furniture and decor for all rooms KITCHEN We bring ease, beauty and safety by scientific and designer approach backed by years of experience of our team in designing kitchen area LIVING ROOM With our wide range of accessories for your living room, Our specialization in designing with minimal accessories will liven up your place. BATHROOM With modern accessories be it tub, shower, tiles, sink. You name it and we will get it to make your bathroom beautiful and to reflect your style. BED ROOM We believe bed room is a most important place in home, Where you relax yourself after tough day. We have a approach to design bedroom with at-most care, to bring you maximum comfort. OFFICE We have a team to build office spaces to make work fun, We provide all kind of necessary accessories to make office smart and a a fun place to work. be it a startup or a MNC. We would love to hear from you. Drop us a message, We will in touch ASAP All these are at reasonable price. Thanks Dhruv Contact on :- 9810866918 / 9910706918