Furrion Instant Hot Water in Cold Weather
I've been couch surfing various new RVs. Grand Design has switched some units to tankless instant hot water heaters. It appears that they are required to be winterized and NOT used in sub 39F condit...
Forum Discussion
wanderingaimlessly wrote:
Tankless water heaters by design have a limited amount of time to warm water. the heating unit only hold a quart or so of water, so water passing through it is only in the heating coils for about 20 seconds for a faucet discharging less than a gallon a minute. Usually they warm the water about 50 degrees by design at their designed flow rate.
If the incoming water is 70 degrees, then it heats to 120 which is fine, but if the incoming water is 40, then the warmed water only has time to reach 90, which is lukewarm at best.
Another issue is water pressure.
If you read the literature on home tankless, they will say not to have water pressure above a certain limit as it pushes the water through too fast to get hot. They want a pressure reducer installed.
Tankless sounds nice, but I would not buy one if I was going to be in cold weather.
