Electric radiant heating

Approach: electric heating. Of course as room heating, but as mentioned as a large-area radiant heater. The room temperature may also be 10-15° or less.

Because of the forgotten "not" and the 10-15° room temperature, I wasn't sure if you really meant radiant heat.

Somehow I can remember a similar discussion about a garage to be heated.

Thermal insulation: is not an option for now: "a few euros" won't do anything, because several building parts and other reasons (use possibly only temporary).

Air heating is also too sluggish if you only use something like this sporadically: it is an experimental workshop where I have to "quickly do something" from time to time or sometimes for longer.

A powerful fan heater would only be conceivable for absolute short-term operation (1/2-1h) or as support when it gets really freezing cold. But it could also be that I have to work or turn for 3-4 hours.

Regards, Dirk

Because of the forgotten "not" and the 10-15° room temperature, I wasn't sure if you really meant radiant heat.

Somehow I can recall a similar discussion about a garage to be heated.

Oh, you're right, sorry, that was confusing.

Of course not as room heating, i.e. warming the room air and contents (I'm not 100% sure if the term fits).
The temperature comes from acquaintances who operate an industrial hall over 6m high (car workshop) with 15° air temperature and water radiant heaters on the ceiling.

Regards,
Dirk

BTW: Does the forum here have hiccups? I can only post every second post/change with a delay of several minutes - it works lightning fast on other sites, so it’s not the connection.

I am still not sure whether an electric underfloor heating system produces appropriate radiant heat? On the one hand, it is not designed for this purpose and on the other hand, in my opinion, it is too weak.

I just found the information on a website about ceiling heating:

Guideline values for specific heating demand Depending on the construction type, the heating demand per square meter of living space (with a room height of 2.5m) ranges between 10 watts (passive house) and 120 watts (for houses without thermal insulation with single glazing).

The workshop probably requires more than 120 watts/m². However, you don’t want living room temperatures either. But with 650 watts for 35m², I hardly believe you will notice anything from the heating at all.

By the way, patio heaters have between 1500 and 2000W and radiate around 10m².

Aha... that's some orientation, thanks! Maybe I should actually build a passive workshop

Or the middle way: a reasonably effective insulation and then live with a low room temperature.

The underfloor heating has 160W/sqm, so in the end it's a question of area. I could even run two strips each (angled) side by side, with the lighting in the middle.
I probably need to do a test with 1 sqm and hang it in the current (still open) shed.

The solution will be that I have to combine different systems depending on how cold it gets.
Laaater there will probably be insulation, then maybe it will be enough.

Cheers,
Dirk