Heating unit of meas. BTU/hr ft^2/deg.

[DaveC426913]

From http://little-giant.com/pool_heating.html"
(The section entitled "Little Giant® Sizing For Swimming Pools
General Requirements" about halfway down the page)

"Using these standards, the thermal conductivity is 7 BTU/Hr. Sq. Ft./°F or 140 BTU/Hr. Sq. Ft. 20°F difference. "

Is this "BTU/Hr. Sq. Ft." a unit of heat loss? Do they mean per square foot? or perhaps x the square footage?


My pool has 550 square feet of surface. I want to figure out the temp. drop per mph of wind, per degree of difference in air/water temp. per hour.


And I guess you have to factor in the volume of the pool too, though they don't. A 10 ft deep pool would suffer less temp drop than a similar-sized 4 ft deep pool.

 

[russ_watters]

They must mean per square foot (which means times square footage to get heat loss).

They don't consider the depth because they are only interested in how much heat you need to add to keep the temp constant, not how fast the temp will drop.

 

[astrokreng]

I would like to address the content on the Little Giant® website regarding their sizing recommendations for swimming pool heating. The units they have provided for thermal conductivity, 7 BTU/Hr. Sq. Ft./°F or 140 BTU/Hr. Sq. Ft. 20°F difference, are not standard units and may lead to confusion for customers. It is unclear if they mean per square foot or if they are multiplying the square footage by the temperature difference.

Additionally, the website does not take into account the volume of the pool, which is an important factor in calculating the temperature drop. A pool with a greater volume will require more heat to maintain its temperature compared to a smaller pool.

Furthermore, the website does not mention the effects of wind on heat loss. Wind can greatly impact the rate of heat loss from a pool, and it is important to consider this factor in determining the appropriate heating unit for a pool.

I would recommend using standard units such as BTU/hr or watts to measure thermal conductivity. It is also important to consider the volume of the pool and the effects of wind when calculating the temperature drop per hour. It is always best to consult with a professional and consider all factors before making a decision on the appropriate heating unit for a swimming pool.