 | Home > Off Topic > Help needed specifing heating in workshop |
 
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6678  
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We have a new workshop being built and I wondered if there were a heating expert on here that could help us out please.
The building will be 18m x 9m with the eaves at 3.3m and the ridge at 4.2m The walls and roof are 40mm thick insulated composite panels The doors are 9' x 10' steel roller shutters (not insulated) and there are four of them I want to use the most cost effective form of heating and maintain a minimum year round temperature suitable for keeping stock dry whilst being able to up the temperature when working in the building. We have electricity but no gas but am happy to use propane cylinders. We don't have waste oil available. Which specific product would best suit our needs ? Thank you in anticipation. |
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3rd May 2015 9:20am |
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6678
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Thank you, that's pretty much the conclusion I'd come too
I'll be buying new so would appreciate views on specific products that will heat the space economically  |
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3rd May 2015 9:32am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558 
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could you have one of the big big static cyl ( one they fill from lorry ) , works out cheaper
id look on ebay quite often see them on there all workshop heaters now have to draw fresh air from outside the building so they never going to be that efficient as one that's warming already warm air istead of having to heat stone cold air , then you got the fact of as your drawing cold air in to heat your pushing warm air out of building  Last edited by munch90 on 3rd May 2015 9:37am. Edited 1 time in total |
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3rd May 2015 9:33am |
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| Go Beyond Member Since: 30 Jan 2012 Location: Headcorn, Kent Posts: 6678
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Possibly, although I'm not sure the usage is big enough to justify it especially as the building is insulated.
What I'm really after is an installer who can work out specifics for me (and possibly quote to install ?) |
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3rd May 2015 9:35am |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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on some heater websites there are calulators you can use to work out by size etc
apart from that sorry cant help |
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3rd May 2015 9:40am |
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| couplands Member Since: 31 Aug 2011 Location: Peak District & Cornwall Posts: 1826 
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When I was planning my large workshop/garage I was hoping to use some form of air-sourced heating pump and/or solar panels and PV panels.
I didn't get as far as looking as the business case for such an investment, but it might be another option..? cheers simon |
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3rd May 2015 1:39pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5858 
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Any mileage on underfloor heating? Maybe off a separate gas boiler powered by propane? Or wood burner with back boiler to heat water for underfloor/tap water? 1999 Defender TD5 110
Regards John M0VAZ Econet Station 48 no clock |
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4th May 2015 12:58pm |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971 
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Bottled gas, whether bulk or not, is still a very expensive way to heat things.
Have you thought about wood chip? For a non domestic installation like that you'd easily get the Renewable Heat Incentive for it and woodchips are about the cheapest for of heat behind mains gas anyway. Pellets are "nicer" but more expensive. Do you have a forklift, telehandler or anything? |
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5th May 2015 12:00pm |
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| steventheplumber Member Since: 29 Apr 2014 Location: Lincolnshire Posts: 767 
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You may be up for a grant, do check as they often change. I would look at a wood pellet boiler. https://www.ofgem.gov.uk/environmental-pro...entive-rhi
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5th May 2015 4:34pm |
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| LiftedDisco Member Since: 17 Aug 2014 Location: Towcester Posts: 354 
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You've actually got two very different requirements as you talk about heating and yet your driver appears to be keeping stock dry...
So, critically, if you heat the air, it will actually carry higher moisture content and the most efficient way to keep materials 'dry' or extend their life is by using a dessicant dehumidifier. If you can keep the Relative Humidity (RH) below 50% (45% is better), you can store most things at an ambient temperature. One of our clients stores charcoal with a simple dehumidifier - this is a product that turns to dust if you allow it to get damp, whilst another stores food grade cardboard packaging. One upside of the process is that the reactivation cycle will heat the incoming air - effectively your 'dry' air will always be 2-3degC warmer than the external temperature. If you need heating, then the suggestion of an air source heat pump and underfloor heating has merit as you will get a CoP (Coefficient of Performance) of around 4.5:1 so every kW of energy that goes in, you will get around 4.5 out. Ground source can be even more efficient but you need to bury the pipework (or go deep with piles etc) to reap the benefits. PM me if you need more info on dehumidification! |
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11th May 2015 4:01pm |
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| ginjez Member Since: 18 Sep 2011 Location: huddersfield Posts: 1763 
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Matt,
Why are you not putting on an insulated door if you are heating the unit? Not only will it not comply with current reg's but you will potentially have condensation forming on the inside which is something you are trying to avoid. Is your unit going to be classed as agricultural as 40mm composites seem quite thin also? Definitely seek advice on using gas as it puts moisture in the air by its very nature. Apologies if my comments seem negative but your first cost should be your last on a new build and cheap isn't always economical
Good luck with your project. |
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11th May 2015 7:08pm |
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| munch90 Member Since: 26 Oct 2013 Location: guildford Posts: 3558
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Gas heating is ok if you got a flue/chimney, its the space style portable heaters that can give moisture problems
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11th May 2015 7:41pm |
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| gumdrop Member Since: 16 Jan 2010 Location: North Yorkshire Posts: 126
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Look at Biomass - wood pellets see .....
https://www.ofgem.gov.uk/environmental-pro...mestic-rhi Cheers Simon ------------------------- 50th D90 - my toy! Freelander SE Td4 3 door - local run around 1958 Series 1- Rag top! |
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11th May 2015 8:09pm |
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