Design temp?

[rhnze]

Is the design temp for hot water baseboard the lowest average winter temp or just the average temp of the heating season? I used the slant fin heat loss calculator to figure my 2 story 1500 sq ft house. The calculator suggests I should have less then 100 ft of baseboard and only 50K btu unit. Seems low for the boiler but the baseboard in most rooms are 8' per room seemed correct. Most rooms have 2 windows I thought a 4' under each window would work better then 1 8' section. I used 30 degree outdoor temp, the average temp for the heating season. According to NOAA the average 30 year low is 13 in my area. which is the design temp?

[rich pickering]

13

[ampulman]

13

An (outdoor) design temperature is one that is NEAR the lowest (highest in summer) temperature expected during a season. It is determined from weather bureau data and is exceeded only a small percentage of the time .

An indoor DT is what setting you use on your thermostat.

If you post your nearest big city, someone will inform you of yours.

AM

[drozwood90]

My first post...yey!

But I was wondering, what is the design temperature for Rochester, NY?

I'm specifically looking for the Winter, but both would be good to know.

Thanks!

--Dan

[BaldLoonie]

At a WAG, not that bad for 1500 sq ft new townhouse. But what do you mean by "seems low for the boiler"?

[Danimal535]

you need to have a load calculation done to do it properly.

[beenthere]

Rochester NY.
AP. Winter design 5°F
Summer design 88°F dry bulb, 71°F coincidental wet bulb.

[rhnze]

At a WAG, not that bad for 1500 sq ft new townhouse. But what do you mean by "seems low for the boiler"?
50K BTU boiler sounded small. Thought I would need more in the 80K range.

[beenthere]

Where do you live.

You don't design for the average temp.

Our average temp is around 36, we design for 8°F.

It makes a BIG difference.