Originally Posted by phorvati
I am trying to find where to buy electric heater
coils for Vector Compact Marine Air.
Reverse cycle still works good, seatemp is 47F at the moment. but I suspect as winter sets in, it seems like a good option to add electric heat option.
We also have the option of reverse-cycle heat or resistance coils in our 3 air conditioners, and use them for heat when at the dock
in cooler weather
. [We are currently at 56°N in SE Alaska
We are lucky in that the Pacific waters usually stay warm enough tor the reverse-cycle heat to work
well. But we also have the resistance coils as a back-up [Along with a forced air diesel
However, we also venture to higher latitudes with colder waters...
One trick we have successfully deployed with our A/C [and our combination air/water cooled refrigeration
system] is to use one potable water
tank for the cooling
water loops— instead of raw water
. [Our potable water tanks— 110 gallons each— are low in the hull
, but stay warm enough for efficient reverse-cycle heat— even in freezing water.] We dedicated one potable tank to this use. It is also still a back-up potable tank in case the watermaker
The cooling plumbing
can be easily switched back to raw water
again if needed [via 3-way valves.] Doing so necessitates a recleaning/sanitizing of the raw water loop before switching back to potable... [More below...]
The advantages of a fresh water cooling loop include:
- Greatly reduced maintenance [eliminated really...] on the cooling water loops with consequent longer lifespan of those components [fresh vs. salt water]
- One less through-hull open
- Reverse-cycle heat works [more efficient than resistance heat] when it otherwise wouldn't when in cooler raw water temperatures
Some disadvantages are:
- Raw water coolant loops need to be hyper cleaned/sanitized before switching to potable water [if the dedicated tank is also a back-up potable tank...]
- Spare potable tank is now emergency only back-up for potable water. [To keep the water fresh in this recirculation tank, we routinely pull water from, and immediately refresh this tank when doing laundry while running the watermaker— or when at a dock with potable water.]
This set-up works well for us.