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I have a gas-fired hydronic system which generally operates at about 135 degrees. The house is heated by standard cast iron radiators (circa 1930).
I’d like to add in a kickspace/toe-kick heater (Myson Wispa II 5000) to supplement a small addition to the kitchen area, but have had conflicting opinions from our heating people regarding the utility of these heaters in our system. One plumber made the suggestion of this heater while another said that the air blowing out from 110 degrees would feel cold. The Wispa II units are designed to operate on systems with 160 deg temperatures, but has 2 thermostat ranges:
1) starting at 129 deg and stopping at 109 (~4,00 BTU)
or
2) starting at 109 and stopping at 91 degrees (~2,300 BTU)
Does anybody out there have any experience/opinions with these sorts of heaters (not necessarily Myson) at the lower temperatures?
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110 degrees is not that cold... My heat pump puts out 85 degree air which is considered too cold. And I agree with this... 85 is too cold. Newer heat pumps are now designed to give air temps closer to 110 to fix this problem older units had... drafty feeling...not warm and toasty.
So...I say ... you will be fine.
near the stream,
aj
*I agree with Jack that 110F air works. Obviously, it helps warm up your house. Will your feet feel cold? Would you feet feel cold in Phoenix on a 110F day, even if the wind was blowing a lot? Of course not.Will you get 110F air from a kick-space fin-tube and blower unit with 135F water in it? Maybe. Maybe a bit less. Those units move a lot of air per linear foot of fin-tube. Vastly more than the natural convection past 180F baseboard units.The blower moving lots of air is only an issue right near the unit. The house will get more heat if the blower moves more air for a given length of fin-tube.The specs you give suggest the unit would put out 2,000 to 3,000 BTU/hour. That's a fair contribution to a small area (100-150 sq feet). As a supplement, it ought to plenty. -David