I seem to be missing, a clarity of what rate was the onset flow rate. Like you said, the watersaver devices may inhibit the onset. It seems as if they are not perfected and still expensive. If I want to add a trickle of hot water, it should be available, even on the bathtub. The cost is prohibitive too I think.
On Mon, 24 Mar 2008, chiliblindman wrote: > Concerns over water rates on these tankless water heaters gave > me concerns of conflict with water saver items. > Small print after the headline tells all. On smaller ones the > rate was given at 4.5 gallon per minute without temp given. Temp > rise on some was 45 degrees above ingoing water temp. At 2,25 g/min. > the temp rise was 90 degrees, etc. > Small single item supply units start at costs at almost 400 > bucks, with whole house units around a thousand. Inputs with gas go > fron 20 kbtu to 140 kbtu with effiency running at 84 percent. These > units can be mounted inside or outside of your house. Electric units > start with 9 to 12 kwh heaters depending on power sourse of 208 or > 220 volt supply. Small single sourse electric supply units use over > 40 amps on a 60 amp breakers. Larger units will have multiple > electric connections with amperage usage almost reaching 100 amps. > These buggers can be used as electric hot water furnaces for heat. > The savings for the most part are a result of close distances of > being heated and being used, and no or very small tank volume to > maintain temp. Water usage is kept down by not running the water > waiting for it to be hot. In a larger home one would want a single > unit for each bath and kitchen for dedicated tankless or small 2.5 > gallon units to temper water when hot water has to come a distance > from one central water heater. > Flow rates on the small booster type for under a sink go as low > as 3 tenth of a gallon per minute, which is good for just getting a > cup of hot water. Temps can be set so no scalding can be done for > safety. > ..............bob > >
