H-34 Heat
Depends where you want heat. If you are at a slip with AC current, the choices are: 1) typical ceramic or coil heaters. Two will keep you cozy until the temperatures drop well below freezing. 2) Oil radiators. I used two 1500 watt units to keep the boat warm for a whole winter in the Chesapeake. They are more bulky than the ceramic heaters but have no fan to fail and they create no drafts. 3) Reverse cycle air conditioning. These produce the most heat per amp of power consumed, but can be drafty depending on the installation. As the water temperature drops, so does their efficiency. They will not work at all as the water temperature approaches 38-40F. Away from the slip: 1) Heater Craft (if memory serves) makes a nice heater core with 3 speed fan that plumbs into the engine hot water side stream that feeds the hot water heater. I have one and it does a nice job while the engine is running. It is of no use with the engine off. 2) Pressurized kerosene bulkhead heater. Taylor (an English Co.) and Force 10 manufacture units that are worthy. These units require some involved installation, but can be used anytime. Depending on what year H-34 you have, you have a kerosene stove. These heaters use the same, or similar burners with the same positive and negative attributes. 3) Propane bulkhead heaters. Again, somewhat involved installation. Your boat does not have a propane system, and you may not want one (I don't). 4) Diesel bulkhead heaters. There are several varieties, some use a drip burner, some use pressurized burners. Some of these take up serious cabin space and produce serious heat. Perhaps best for liveaboads 5) Espar, or other, remote burner diesel air heaters. These have circulating fans and heat like a home heater. You could probably replace your home heater for less than a professional Espar installation. I have heard that these units are wonderful when they work properly, but expensive to fix when they don't- which can be frequently. 6) Diesel water heaters with hot water circulation to radiators or circulation units. Expensive but even heat, a nice choice for serious liveaboards in that they can also heat your domestic hot water. Espar and a few others make these units. You could heat your house for less.Last are the non-vented heaters. Made for camping, these units can kill you in a tight cabin. I have never considered them seriously, but some people use propane, Coleman Fuel, and Alcohol catalytic heaters with success. All put tons of moisture into the cabin making a soggy, drippy mess, and I have never experienced one that does not smell.There are the choices. I use the heatercraft to get the cabin toasty at the end of the day while the engine is running. We tough it out in the morning. Making coffee on the kerosene stove helps warm things up. For a bit more comfort, I would opt for the bulkhead kerosene heater by Force Ten. I really donn't know where I would mount it. It seems like there is no perfect p></t, which is the only reason I don't have one. Hope this helps.