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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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heaters (patio heater?)
In an earlier contribution to this discussion,
wrote: I'm spending a lot of time in the garage and I'd like to be able to heat it whilst I work in there. I was wondering about these quartz patio heaters which are advertised as "the only heat that doesn't blow away". Are they any good? I notice they are only rated at about 1.2kW, whereas a fan heater might be 3kW. Is this because they are more efficient or would they not warm me as much as a fan heater? I see they say they must be mounted 2.7 metres high. Is this because the higher they are the wider area they will cover? For a patio, that's fine, but who has a 2.7m high garage? Could I mount it lower? I'm wondering if I need some frost protection in there to keep the odd tins of pint from freezing and too keep condensation off the tools to prevent rust. Would a tubular heater on a frost stat do, and if so is there a formula to calculate what size heater I'd need? Have you thought of using something like this? http://tinyurl.com/3y8z55 You'd have to make sure you had good ventilation, of course. With regard to frost protection, the formula is exactly the same as that used for calculating normal heating requirements, but the numbers are different. Decide what temperature you want to maintain under what conditions - e.g. 5 degC inside when it's -5 degC outside (say) - then work out the heat losses, taking into account the U value and area of each external surface (walls, windows, doors, roof, floor). Whatever heater you put in there needs to be able to replace the heat which is going out. A greenhouse heater of a few hundres watts may well suffice, but you'll need to work it out. -- Cheers, Roger ______ Email address maintained for newsgroup use only, and not regularly monitored.. Messages sent to it may not be read for several weeks. PLEASE REPLY TO NEWSGROUP! |
#2
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heaters (patio heater?)
" Have you thought of using something like this? http://tinyurl.com/3y8z55 You'd have to make sure you had good ventilation, of course. With regard to frost protection, the formula is exactly the same as that used for calculating normal heating requirements, but the numbers are different. Decide what temperature you want to maintain under what conditions - e.g. 5 degC inside when it's -5 degC outside (say) - then work out the heat losses, taking into account the U value and area of each external surface (walls, windows, doors, roof, floor). Whatever heater you put in there needs to be able to replace the heat which is going out. A greenhouse heater of a few hundres watts may well suffice, but you'll need to work it out. -- Cheers, Roger Radiant heat heaters heat YOU if pointed at you - not too close though, else you may combust !! Little point in trying to maintain the whole room above ambient - it would take a load more heat input to do that without good insulation. Nick |
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