Onboard Heater

[Sue & Larry]

I have a Dufour 36 classic that is kept on Lake Superior. Do you have recommendations on boat heaters? I would prefer to use diesel and forced air, but I'm open to suggestions.

Sue & Larry respond:
We agree with you that choosing a diesel-fueled heater makes the most sense since it’s safe, economical, and the easiest fuel to replace when needed. If you already have a preference for a diesel and forced-air system, we say go for it! These systems are very efficient and are highly regarded among boaters. They are, however, more expensive than some other heaters, require the running of ducts throughout your boat, and consume electrical power when in use. For a boat your size, a forced-air system from either Espar or Webasto will cost you something in the neighborhood of $2,500.

We know a number of cruising friends who love their forced-air systems. The only complaint, other than the relative high cost, is that the air blowing through the ducts can sometimes be a bit noisy.

A less expensive and more commonly seen option for heat is to use a diesel-fueled radiant heater either mounted on the bulkhead or occasionally free standing when space allows. This type of heater uses a burner pot or chamber that vaporizes the fuel prior to combustion. These heaters are externally vented, straight up through your cabinhouse via a stainless chimney. If you intend to heat primarily a single area, like your main salon, this type of heater makes good sense. It’s easy to install, and relatively inexpensive with prices ranging from $350 to $1,000. Good luck and stay warm.