The Worlds Tiniest/Easiest Residential Heat Loss Calculator?

lsayre · Post by **lsayre** » Sun. May. 08, 2016 12:17 pm

0.004 x Your Locations Annual HDD's x Sq-Ft of Heated Living Space = Heating Appliances Minimum Required Output BTUH

Disclaimer: No guarantee expressed or implied. I was bored today and looking for some amusement, so clearly use this at your own risk. Your mileage may vary based upon the homes insulation, windows, basement, crawl space, air infiltration, age, cathedral ceilings, living area sitting over an unheated garage, etc... But you've got to start somewhere, and this should get you to the middle ground.

Note: Most heating appliances are rated by their maximum Input BTUH. Output BTUH/Appliance Efficiency Rating (as a fraction) = Input BTUH

davidmcbeth3 · Post by **davidmcbeth3** » Sun. May. 08, 2016 2:27 pm

I just open my air intakes ... no need for any BUTT calculations.

^^^ I like big butts !

SWPaDon · Post by **SWPaDon** » Sun. May. 08, 2016 2:40 pm

lsayre wrote:0.004 x Your Locations Annual HDD's x Sq-Ft of Heated Living Space = Heating Appliances Minimum Required Output BTUH

Disclaimer: No guarantee expressed or implied. I was bored today and looking for some amusement, so clearly use this at your own risk. Your mileage may vary based upon the homes insulation, windows, basement, crawl space, air infiltration, age, cathedral ceilings, living area sitting over an unheated garage, etc... But you've got to start somewhere, and this should get you to the middle ground.

Note: Most heating appliances are rated by their maximum Input BTUH. Output BTUH/Appliance Efficiency Rating (as a fraction) = Input BTUH

I was waiting to see if this was you Larry, but apparently it wasn't

:

https://www.yahoo.com/news/flight-delayed-passenger-reports-professor-194613310.html?nhp=1

lsayre · Post by **lsayre** » Sun. May. 08, 2016 3:34 pm

For the most part I only do elementary school level math. That guy was probably doing something much more complex.

plumberman · Post by **plumberman** » Sun. May. 08, 2016 3:37 pm

25 btus per sq ft new construction. 40 BTU old construction

lsayre · Post by **lsayre** » Sun. May. 08, 2016 4:09 pm

plumberman wrote:25 btus per sq ft new construction. 40 BTU old construction

At least some portion of the differential between 25 and 40 was due to the inefficiency of older heating appliances vs. newer heating appliances, combined with using Input BTUH instead of Output BTUH.

There are probably homes being built presently that can get by with as few as 15 Output BTU's per square foot.

My simplistic approach yields:

5,000 HDD's x 0.004 = 20 Output BTU's per sq-ft
5,500 HDDS x 0.004 = 22 Output BTU's per sq-ft
6,000 HDD's x 0.004 = 24 Output BTU's per sq-ft
6,500 HDD's x 0.004 = 26 Output BTU's per sq-ft (I'm about here)
7,000 HDD's x 0.004 = 28 Output BTU's per sq-ft
7,500 HDD's x 0.004 = 30 Output BTU's per sq-ft
8,000 HDD's x 0.004 = 32 Output BTU's per sq-ft (Rob should be about here)

freetown fred · Post by **freetown fred** » Sun. May. 08, 2016 4:13 pm

Bored, humor yourself??? Hard to believe Larry.

lsayre · Post by **lsayre** » Sun. May. 08, 2016 4:15 pm

freetown fred wrote:Bored, humor yourself??? Hard to believe Larry.

No TV

freetown fred · Post by **freetown fred** » Sun. May. 08, 2016 4:16 pm

Come on, it's beautiful outside!

lsayre · Post by **lsayre** » Sun. May. 08, 2016 4:32 pm

freetown fred wrote:Come on, it's beautiful outside!

Been charcoal grilling for a good part of Mother's day. 3 phases of cooking were done to maximize the utilization of a single load of charcoal on our small grill (which was intended to be a side-smoker add-on to a much larger grill, but which the wife and I use as a stand-alone grill).

Phase 1, Western Style Ribs
Phase 2, Burgers and Brats (today's meal)
Phase 3, Pot roast cooked on the grill in our cast iron Dutch Oven (just got done bring this one in)

Boredom ended when the grilling operation started....

titleist1 · Post by **titleist1** » Mon. May. 09, 2016 6:50 am

Todays question is....how many BTU's was that charcoal griller putting out?!?!?!?!?!

blrman07 · Post by **blrman07** » Mon. May. 09, 2016 6:52 am

lsayre wrote:
freetown fred wrote:Come on, it's beautiful outside!
Been charcoal grilling for a good part of Mother's day. 3 phases of cooking were done to maximize the utilization of a single load of charcoal on our small grill (which was intended to be a side-smoker add-on to a much larger grill, but which the wife and I use as a stand-alone grill).

We would expect nothing less!!!