Actually Alde USA, which used to be in Vancouver, Washington, is now in Indiana.
The Alde has been in Roadtrek Class B's for a number of years. It takes up less space than a furnace and HWH.
When it works well it is great -- hydronic fluid circulating to convectors and heating the floor directly.
It does, however, require maintenance, including periodic flushing, bleeding the system, and fluid exchange.
On forums devoted to Roadtrek, the Alde is a frequent item that "just doesn't;t seem to be working right". The company's US division has not been very responsive to the consumer, and technicians that know it are uncommon.
In my opinion the Alde is over-engineered for the task it has to do. An RV furnace and water heater are more reliable, if somewhat noisy.
