Under floor heating in the workshop

[Quattromike]

The building we’re in this week has air source heat pumps running the heating. I don’t know the running cost but seems nice enough temperature wise.

 

[V8Druid]

The building we’re in this week has air source heat pumps running the heating. I don’t know the running cost but seems nice enough temperature wise.

I believe the systems are no cheaper to run than a conventional heat source, with all the equipment required to actually extract useful heat
installation costs're much higher though, so I understand.

 

[Left hooker]

Just it remember where you put them if you need to thunder bolt stuff down in the workshop

 

[Quattromike]

Aye that's a major issue where we are just now, we've been told we can drill 50mm for anchoring to concrete floor. 50mm! What the duck use is that

 

[doobin]

Aye that's a major issue where we are just now, we've been told we can drill 50mm for anchoring to concrete floor. 50mm! What the duck use is that

Depends what you're anchoring. You can always use more fixings.

 

[V8Druid]

Depends what you're anchoring. You can always use more fixings.

you jest Doob

 

[Mogman]

https://www.uktoolcentre.co.uk/uni1...ZXyIDF_QzmiHuxNXDwtKriMvJXfGoEaAiiNEALw_wcBOr
just use no nails
I’m sure it will hold a raidial arm drill still

 

[tinydigger]

i do believe you are all over thinking this with your screwing down and no more nails remember the basic 3 tools of the trades if it is stuck and it should move wd40 it moves and it shouldn't DUCT TAPE and for all other jobs use a hammer

 

[Quattromike]

I think we are officially sold on the underfloor heating concept, it's now just a matter of what we do for a heat source. It appears the government offer incentives for renewables but it throws up more questions than answers. Anyone have experience of the different options on this?

 

[fred]

If you are on mains gas then combo is cheapest install. If you want low running costs then ground source heat pump, if you don’t have space for ground loops then air source is last.

All three are 100% tax deductible for the business just a matter of deciding high upfront cost then low running or low upfront and average running costs.

I am a fan or heat pumps as they have something like 4:1 efficiency. So for every £1 in you get £4 of heat out. Ground source being the best, can save a wedge if you can trench out the loop runs yourself, does get expensive if no room and you have to vertical drill /pile

 

[Quattromike]

Tbh the route we were considering was biomass. Big log burning boiler supplying the heat and a tank of water to heat and a pump running the hot water through the ufh.

 

[fred]

You will be looking at a pellet/chip burner in that case. Similar upfront costs to GSHP , little bit cheaper per kw/h to run but you have the hassle of feeding it, storing the pellets dry etc Lot's of farmers use them to heat the sheds/farmhouse. Have a ring round of local approved installers and get some quotes for both systems. To get the gov payback you have to use a cartel installer unfortunately.

 

[Quattromike]

Wasn’t thinking of pellet/chip burner but the Log gasification boiler. There is an opertunity with that to use other wooden items that happen to be lying about .
The concern is if we load her up on a Saturday afternoon will it still be alight on Monday morning to keep the heating going?

 

[Alan caddy]

Can you do a bore hole before you put down floor and get your ground source from there

 

[V8Druid]

Can you do a bore hole before you put down floor and get your ground source from there

interesting idea ..... never thought of that one

 

[fred]

Can you do a bore hole before you put down floor and get your ground source from there

this is the option if you don't have a field to put the horizontal loops as its a LOT more expensive.

 

[V8Druid]

this is the option if you don't have a field to put the horizontal loops as its a LOT more expensive.

but would all be contained within the footprint of the building if one could do the bore holes under the slab .... find your own water source whilst yer's at it too perhaps

 

[Stubota86]

Has anyone had experience of putting underfloor heating in an Industrial workshop? If you have a 200 mm concrete slab with heavy machinery sitting on what is used for insulation underneath and how far into the slab do the pipes sit?

We’ve used Styrozone XPS in garage floors as it has a better compressive strength than the usual PIR boards and an Isocrete Isopol SBR as a screed additive plus fibres for strength

 

[BertB.]

Heated slabs are very common here (Canada for those that don't know where here is) most shops where I've worked over the years have heated slabs you prepare your granular base like you normally do 1. strip organics 2.roll out geotextile if its required 3. granular compacted base 4. layout 2-4" of closed cell styrofoam depending on whats required by an engineer. 5. layout rebar grid and polyethylene tubing. Some structures however require pilings and grade beams but this is a basic run down of a monolithic heated slab for over here. I tried to find some decent construction drawings and details for you guys so you can see what the code is for here but I didn't have any luck but here's something from a supplier here.

http://heatinn.com/

 

[Monkeybusiness]

Graham - here is the information you require!!! Page 30 of the doc (32 of the pdf) gives details of Snowmelt Applications (so you could run underfloor heating down your drive, and never have issues with the white sh*te again!)... Surely this would make a nice little project for a man of your means - it could even be deemed essential for a gentleman residing in such inhospitable surroundings!

http://heatinn.com/diy/Install Manual.pdf