akd1961 said:
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Also we overheard a conversation was about a Bailey about the pipes underneath and they were saying it doesn't stay warm, what should we be looking for?...
Hello Angie,
The mains inlet question has been answers by others.
The heating question, I suspect relates to the use of a blown air heating system, which uses a room sealed gas convector style heater, with a fan mounted behind to draw off hot air and to blow it along heating ducts which are about 65mm (2.5") diameter. Most of the recent gas heaters also have an additional mains element, so you can use either gas or electric or even both together should it be needed.
The heaters tend to be fitted in front of the wheels, and it means the air duct needs to pass the door or other internal obstructions to get hot air to the rear of the caravan.
In some cases the only practical way is to route the duct under the floor to pass the door which exposes it to the outside air, and the concern here is the duct will lose heat reducing the heat from the rear of the caravan. The heater manufacturer does offer a sleeved overcoat pipe to protect the ducts under the caravan, but it up to the caravan manufacturer to choose to buy and fit it.
Another issue that affects the amount of heat that gets to the extremities of the ducting is the length and the number of bends and outlets fitted. An all case the more or longer the less air flow that will reach the end of the ducting.
Despite these issues it is possible to improve things, Fitting an overcoat to teh exposed pipe under the floor will reduce heat loss. Whether it's the heater manufacturers own pipe or some other method of insulating doesn't matter either will improve things a bit.
Other things that might help, checking the route the pipe takes and if possible rerouting to eliminate unnecessary bends, and if possible to reduce length. But the rest is down to tuning the outlets, perhaps partially closing those closest to the heater a little to maximise the air flow to more distant out lets.
In a couple of caravans where there was poor air flow to the rear of the van, I have installed additional pipes on the other side of the caravan and created a complete loop of ducting that feed all the outlets from both sides of the fan. Unfortunately this is not practical in all caravans but it made a big difference throughout the whole caravan where it was possible.
Basically blown hot air systems are great in smaller caravans, and less good in longer ones becasue of the length of ducting required.
Some caravan manufacturers now fit liquid based heating systems.The smaller water pipes can be routed more easily and because the water carries much more heat energy it looses less heat when its taken outside and under the caravan, but its still advisable to lag the pipes.
Hot air systems respond more quickly when heat is needed, and becasue they blow the air it mixes and produces a more even heat distribution from top to bottom. Wet systems take longer to respond, and becasue they only use convection, in the short term the caravan can get warm at head height much sooner than at floor level. Longer term after a couple of hours or so there is little to choose between them at providing a comfortable caravan.
Both work quite well and its really a matter of personal preference, and of course which system is fitted by the caravan manufacturer