# Is 13 degrees cold for a house?

## Is 13 degrees cold for a house?

Below 13° – If your home is this cold, it may increase your blood pressure and risk of cardiovascular disease. 14-15° – If your home is this cold, you may be diminishing your resistance to respiratory diseases. 18° is the recommended night time bedroom temperature.

## Why are my radiators cold at bottom but warm at top?

If you’ve just turned the heating back on after the summer, air can become trapped in your radiators, causing them to be warm at the bottom but cold at the top. If this is the case, you may need to bleed your radiators.

## What’s the difference between 20 and 12 degree radiators?

To reduce the difference from 20 to 12 you will want to open the lock shield. As this fastens the flow off hot water getting from the flow to the return, in return loses less heat output from the radiators. However I would start the process with it fully closed and gradually open until you get a 12 degree difference.

## What happens when you open the radiator cap?

This will cause air pockets to get inside of the heater core, thermostat, and radiator hoses. As a result, the engine will start to overheat because it cannot sustain a temperature that is consistent. Warning: Never open the radiator while it is hot!

## What to do if your upstairs radiator is not getting hot?

Open the drain and close the ball valve and see if you can drain hot water thru to the basement from system pressure. Or if you have a valve on the supply side of the radiator upstairs, close it so when you bleed it will makeup thru the return pipe and see if the pipe/rad gets hot as you bleed air/water out.

## Can a temperature drop of 11 degrees across a radiator?

There is nothing to prevent you achieving a 20°C drop across the rads if the system has been designed with this in mind. I’m probably being thick, but I don’t see how a temperature drop of (say) 11 degrees across each radiator in a system can give a boiler flow / return differential of 20 degrees.

To reduce the difference from 20 to 12 you will want to open the lock shield. As this fastens the flow off hot water getting from the flow to the return, in return loses less heat output from the radiators. However I would start the process with it fully closed and gradually open until you get a 12 degree difference.