Kingdom heater vent

One of the very few gripes we have with our Kingham is the poor heating at the front end of the van. There is a vent that exits from the step into the cab, but even with the other vents closed there is little to no warm air coming out of this. The result is a huge temperature difference between the front and rear of the van with cold air coming off the exposed metal surround of the sliding door and around the cab. Have any other Kingham owners experienced this or do they find the heating in the lounge area OK?

Whilst we have noticed cooler air from the front than the rear of the van we have found in the short time that we have had the Kingham that the whole van soon heats up quite quickly throughout and negating the initial concerns about the cooler air at the front.

Are you certain that the vent in the cab step is an outlet? I don't know the Kingham, but on similar vans it's quite common to have the inlet vent in the cab and the outlets further back in the van, so that the air can circulate via the cab and then back to the heater. My current van is similar, with the inlet/return under the driver's seat, and this inevitably makes the cab the coldest part of the vehicle - which just means that if I need to be in the cab I turn the heating up a bit!

I also have the same problem. The vent is definitely outlet but the hose is small bore and has a long way to travel from the heater. There are also small bore outlet pipes going to the wardrobe and under the seat. All the heat is at the rear where you have 2 large bore pipes with only a short distance to travel and a small bore pipe going into the washroom.  Also the heater itself is under the bed at the rear.

-mojo- wrote:Are you certain that the vent in the cab step is an outlet? I don't know the Kingham, but on similar vans it's quite common to have the inlet vent in the cab and the outlets further back in the van, so that the air can circulate via the cab and then back to the heater. My current van is similar, with the inlet/return under the driver's seat, and this inevitably makes the cab the coldest part of the vehicle - which just means that if I need to be in the cab I turn the heating up a bit!

Our van has the same heater layout as its the same set up with a few differences, Mojo is correct in that one of the outlets or what looks like outlets is in fact an inlet. Our van heats up very quickly indeed and its seldom on for more than a few minutes. I have heard reports of owners with similar vehicles finding ducting pipes either not connected or connected wrong.

Charliefarlie wrote:

-mojo- wrote:Are you certain that the vent in the cab step is an outlet? I don't know the Kingham, but on similar vans it's quite common to have the inlet vent in the cab and the outlets further back in the van, so that the air can circulate via the cab and then back to the heater. My current van is similar, with the inlet/return under the driver's seat, and this inevitably makes the cab the coldest part of the vehicle - which just means that if I need to be in the cab I turn the heating up a bit!

Our van has the same heater layout as its the same set up with a few differences, Mojo is correct in that one of the outlets or what looks like outlets is in fact an inlet. Our van heats up very quickly indeed and its seldom on for more than a few minutes. I have heard reports of owners with similar vehicles finding ducting pipes either not connected or connected wrong.

The vent in the cab step on the Kingham is definitely outlet.

bobash wrote:

Charliefarlie wrote:

-mojo- wrote:Are you certain that the vent in the cab step is an outlet? I don't know the Kingham, but on similar vans it's quite common to have the inlet vent in the cab and the outlets further back in the van, so that the air can circulate via the cab and then back to the heater. My current van is similar, with the inlet/return under the driver's seat, and this inevitably makes the cab the coldest part of the vehicle - which just means that if I need to be in the cab I turn the heating up a bit!

Our van has the same heater layout as its the same set up with a few differences, Mojo is correct in that one of the outlets or what looks like outlets is in fact an inlet. Our van heats up very quickly indeed and its seldom on for more than a few minutes. I have heard reports of owners with similar vehicles finding ducting pipes either not connected or connected wrong.

The vent in the cab step on the Kingham is definitely outlet.

Interesting... On the Kemerton there are two vents. One an inlet the other an outlet.

On the Kemerton, Charlie, the Whale heater unit is under the step into the cab and the inlet is by the sliding door. This is why the heat doesn't get to the bathroom as efficiently as it should. The Kingham has a Truma heater unit under the bed at the back of the van so has a long way to go to heat the front. No idea where the inlet pipe is, I guess somewhere near to the unit.
We have had problems with disconnected pipes, put right at the last habitation check, and now the system works a lot better. Still not as good as the Truma convector heater as in our previous van, a Talisman.

On the Combi 6 there is no ducting for the inlet. It takes the air direct into the unit as shown in the diagram.

Many thanks for the replies and comments. The vent in the step is definitely an output, when I first investigated the lack of flow from this vent I found the feed pipe was not connected - it was actually cut too short! The dealer fixed this but still there is little on no airflow even with the other vents closed and the fan on high - not something I would persevere with anyway for fear of causing the heater unit to overheat. Yes the van certainly will warm up quickly but it seems no matter how high the fan and/or temperature are set, there is still a very frustrating cold draft at floor level.
I do now think it to be design issue, as mentioned already, a combination of reduced pipe bore, long length from heater to outlet and also splitting the feed between cupboard, under bench storage and cabin all contribute to the lack of heat output up front. I guess it's either a blanket or indoor thermal boots on the wife's christmas list!

In the same arena of heaters/water etc in the Kingham...I have located a switch located under the sofa mounted above the fuse panel labelledas "waste tank heater isolation switch". Forgive my stupidity but whilst it states what it is I dont understand the function is and what I should do with it at any particular time. I have looked in the manual but cant see the wood for the trees on this item. Can anyone point me in the right direction as to when I need to use it  please?

sylvester1954 wrote:In the same arena of heaters/water etc in the Kingham...I have located a switch located under the sofa mounted above the fuse panel labelledas "waste tank heater isolation switch". Forgive my stupidity but whilst it states what it is I dont understand the function is and what I should do with it at any particular time. I have looked in the manual but cant see the wood for the trees on this item. Can anyone point me in the right direction as to when I need to use it  please

The switch for the tank blankets is on the control panel. You can turn the waste tank blanket off by using the isolation switch whilst still keeping the fresh water tank blanket on.