Hi has any one installed a kenlowe pre heater into there defender are they any good and are they easy to install thanks

From what I've read in one the old LRO mag sometime ago they seemed very easy to install. I believe there was an issue with one version might be the original one having problems when over heating the motor inside burnt out. I think the square type. The newer ones have a round enclosed container with the motor separate. The connection are the heater inlet and outlet route from the engine to the heater matrix via a t junction. Then a extension cable leading out to the front of the grill.I think you only need to heat up for an hour. I think in remember rightly you can have a relay from the main power to an internal heater fan to warm the cab. Or in my the greenhouse CSW version.
A few were sold on ebay as second hand last time I remember. But be weary of no guarantees as to condition especially the square type. price wise can be about 360 odd beer chits. Hope this helps.