Furnance Cycling

[JAB]

We have a 2010 MS and would like to know what is the ave cycle time of the furnance?

[Huck]

It depends upon the outside temp.

The fan runs a lot longer than the burner. When it is very cold out the fan could run almost constantly and the burner will cycle of and on. Gives the impression that the furnace runs too much.

[Motor31]

It also depends on weather conditions (lots of wind, snow, freezing rain etc) and what temperature you set it at. It will cycle far less in cold weather if set at 60 than at 73. It also depends on the size of the RV too. Larger ones require more and more frequent heating due to loss from the seals (especially if they are the ones the factory cut holes in) windows and poorly sealed access hatches.

These things are NOT really sealed for air and temperature transfer. Try an experiment. If the weather is not too bad, take at least one fantastic fan set to blow out on high. Leave all the windows and door(s) closed. Then walk around the rig and see how much air is being drawn through the rig from multiple places due to the fan. It will be a real eye opener I assure you. Check the sliding pocket door that is open to the basement. That's a really good flow point.

[Gemstone]

On our TK3, the gap between the kitchen slide and the floor is about 1/2", and with that silly slide sweep gasket with three notches cut in it, an unbelievable draft was felt. Since we set up for months at a time, I stuff that gap (and others) with a high density foam. It does a lot to keep air transfer to a minimum.

Regards
Gemstone