Does the fan actually go round?

Radiators don’t circulate heat in the same way as the fan but you should feel the heat radiated from them after they have warmed up though this will probably take between 1/2 to 1 hour depending on your boiler. I assume the circulating pump for the rads is working or otherwise your boiler would shut down fairly quickly.

Regards

Pete

Thermal transmittance! If your boat is poorly insulated or the insulation is wet, particularly the roof, you are not heating your boat you are keeping the pigeons warm.

Warm air will not naturally travel to a cold area without being forced and depending on how cold the adjacent area is determines the force required. However cold air will travel to a warm area readily and without invitation and pushes all your nice warm air up so that your feet are cold.

Physics can be so cruel.

I have been a heating engineer for 30 years and thought I would offer my contribution by possibly stating the obvious.

Try not breathing so much at night, this creates a lot of moisture

Paul Smith said
If your feet are cold when you’re inside the boat get yourself a pair of “slippers”. Sally and I both have Crocs for indoor wear. They’re made of rubber and insulate feet completely from cold floors. They’re extremely comfortable too. I use mine when I’m on the beach. I’ve walked miles and miles in them without a problem for my normally very sensitive feet.

They look good.  Unfortunately no outlet near me so would have to order by post.  Would you say the sizing is on the large or small side?

ETA  Now found the sizing guide on the website and ordered a pair.

Hiya,

I sort of had an issue a bit like this a couple of years ago. I was at work all day, would go past the pub for a couple in the evening on the way home, then get back to the (cold & wet) boat.

I would then fire up the cooker for dinner, and light my fire. I had too small a chimney on it, so it tended to be very on or out.

Dinner cooked, bottle of wine drunk & I would go to bed.

The result of all this is cooking with gas dumping a load of water into the atmosphere (it is someting like for every kilo of gas burnt, you get a kilo of water…). Add boiling pots to this, hot (steaming) water for washing up, and you have ‘shed’ loads of humidity built up. Add to that your breathing overnight, and you have a ‘deficit’ of water around.
If it is cold, you close the windows & vents to keep the cold & wet out (in theory).

Meanwhile, your burner may have only been on for, say, and hour or two. They only seem to start cracking out the heat after a couple of hours- and your back burner particularly will take TIME to heat up- and if your system to the rads is (I presume) gravity fad, a LONG TIME to get to the rads at the other end of the boat!

Sounds like waiting for a nice clear day one weekend, and opening all the windows for a couple of hours- meanwhile stoking up the fire for the best part of the day to get everything moving round. The tips for using a de-humidifier by the owner of this site in the guides he publishes are usefull too. It might be worth isolating your wettest bit (binbags over walkway) and temporarily sealing vets / windows & cracking on the dehumidifier for a bit (but do clear the tape back afterwards).

I had terrible humidity probs till recently- I got my Aldy gas heater working again, and set the fire in for a day- and since then the window condensation is minimal.

Hope any of the above helps! J.

I agree with Andy. Just as an example. I arrived on Clarence about two weeks ago, whether not too cold so I used a fan heater morning and night just to warm the boat up. Next day the condensation was everywhere. Weather gets colder so I turned on my diesel stove, which heats two rads, running that on low overnight. Result almost no condensation. In retrospect I would have been better running the stove from day one.

I suspect your solution is to run that stove 24/7, just enough so the boat feels warm when you step into her and your condensation problem will reduce and over time will drop to almost nothing.