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I am using panel rads because I do not want baseboard on every inch of my wall. So..
I am planning to run my boiler @ 120 degrees to maximize efficiency, and sizing my rads at their 120 degree BTU output. How should I size my rads? Exactly at the required BTU loss or should I oversize in some fashion? My design temp difference is 7 degrees based on the 99% rule. I also plan to have an outdoor reset, so that should handle any really cold days by increasing boiler temp?
I will need 13-14 rads, 16" high(to fit under windows) at various lengths(24-72"). I am not a contractor, so finding someone who will even sell panel rads to me is hard and the rads listed online are too expensive. I did find one company that will sell me Beacon Morris @ ~$150-350ea, which is a lot better than online, but still fairly expensive.
I then took a look at buying from alibaba.com, a chinese site. I know, its china, blah blah blah..anyway.. A company on there has rads that look identical to any other major company, but priced at ~$30-$100. They require a minimum order of 50 and by sea shipping for 50 rads is $1000. I know quality is an issue, but I can buy 3x the rads for the same price of the ones in the US that come from europe. They are made out of colled rolled steel. I am still waiting on a response to see how thick said steel is. ..Maybe someone on here wants to go in on a group buy?..haha
What is your recommendation on buying panel rads?
As stated previously I need 16" high rads. That eliminates companies like Buderus(Bosch) that do not make that height. I have also eliminated Myson because the longest length they make is 48" and in some areas I need longer than that because I am running at low temps. **EDIT**: My mistake, seems myson makes up to 63" in length.
Pensotti(granby) and EcoStyle are expensive. Runtal is also expensive and I do not need any fancy designs. I eliminated all 3.
Beacon Morris seems to be my best bet, anyone have experience with them? ..are they good quality? Does anyone have any other manufacturers they recommend?