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would this heater in my sheds future false ceiling be a good idea? Answered

I've come up with an idea for a heater in my sheds future false ceiling. Its basically a wooden box with an unmodified hairdryer attached and four PC fans blowing the warm air down each of the 4 clothes dryer hoses to vents roughly at floor level.

I've seen one ibble where the heating element and motor were removed and used but don't fancy that idea too much.

The shed is brick with a reinforced concrete roof and gets extremly cold in winter. The false ceiling will be around 10 inches from the concrete to allow for the stone 9inch mantle above the window and door and gas pipe. The gas pipe is capped and don't want a boiller in a confined work space .

Here is a plan of the heater (excuse the odd looking hairdryer)

Forgot to mention the widhth and length are f 7ft x 6ft and the height is 7ft.

Discussions

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cyberraxx

2 years ago

I forgot to mention that my shed is 7m long, 6m wide and 7m high, single brick walled with concrete floor and has a 7inch thick concrete roof. The false cieling will also have a depth of 7inch due to an active capped off gas pipe running through the center of the shed roof 5inches from the cieling.

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Vyger

2 years ago

You have a number of issues that I can see. One is that a hair dryer is not meant for continuous use. It is a short time on appliance so all the components are wimpy. Next is that the output is pretty small. They are made to not get too hot otherwise they would set people on fire. I have used one to thaw out frozen pipes and it required hours of running in a closed water heater cabinet before it got it warm enough. A far better choice is a small electric heater that is designed to be left on for long hours and has the capacity to put out heat. In addition they have safety features like switches that turn off if it falls over so it doesn't start fires.

A heater has to be able to match the heat loss that is happening otherwise it will never get ahead of the cold. A hair dryer is not going to do that. The greater the heat loss the bigger the heater you need.

I have a propane heater for my shop but because of the holes in the floor it can barley keep up. When I get the holes patched and the walls insulated it will do a lot better. Heating is about 3 things, the size of the heater, the degree of heat loss (insulation and infiltration, and the temperature difference between inside and outside. Get something that is designed to heat space and it will be much more efficent.

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cyberraxx

2 years ago

I've been thinking about the lint thing, iceng and decided to add a filter to both the floor level inlet vent and to the hairdryer inlet. 2 smoke/heat detectors are already fitted in the shed

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Downunder35m

2 years ago

I had similar thoughts for my old shed until I put a wood fired pot belly in there....
IMHO the only good way of doing this would be by using a diesel powered car/camper heater.
They use about 150ml of fuel per hour and if you don't have too much draft in your shed it will get nice and warm.

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iceng

2 years ago

A hairdrier will collect lint plug-up in about a year's time and blow the ONE-TIME internal fuse, thereafter you will wire around the fuse, clean the lint and have a ceiling fire about the third winter...

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RampedUpDIY

2 years ago

hmmmmm, you remind me of how cold my shop is going to get this winter.... (leaves to find old heater).

Not sure one hair dryer is going to be hot enough to harm you shop, especially if you don't have any insulation to hold in the heat. Given a hotter heat source and some stronger fans though your design looks great!

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rickharris

2 years ago

In my opinion no. Buy a convector heater