Heat-Base 750 a

Residential

Slim and unobtrusive, the low profile Model 750's BTU output is ideal for efficient, economical residential installations.* Standard 22 gauge front cover and optional heavy duty 18 gauge front cover (Model 758).

* Available with 1/2 inch Copper.



Table 1 - Heating Capacities, BTU per hr per lin. ft. 65 degrees entering air temperature
Model Nominal
Tube
Size
Finish
Dimensions
H X W
Thick-
ness
Finish
Spacing
Fins/Ft.
Water
Rate
GPM
Hot Water Ratings
Average Water Temperature degrees F
Heat-Base
750-1B
3/4"
Copper
2 1/8" X 2 1/2"
Natural Finish
0.008 54.5 -- 90° 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200° 210° 220° 230° 240°
4 70* 110* 170* 230* 280* 340* 410 480 550 610 690 760 820 900 970 1040
1 70* 110* 160* 210* 270* 330* 390 450 520 580 650 720 780 850 920 980

* Ratings at 140°F and lower temperatures determined by multiplying 150°F rating by the applicable reduction factor
All the above ratings are based on active length, which is 3" less than total length, and includes a 15% addition for heating effect.
Ratings: Heating capacities are listed in Table 1 for two flow rates: 1 GPM and 4 GPM. The use of ratings at 4 GPM is limited to installations where the water flow rate through the baseboard unit is equal to or greater than 4 GPM. Where the water flow rate through the baseboard is not known, the ratings at the standard flow rate of 1 GPM must be used.


Table 2 - Factors for ratings at flow other than standard and pressure drop values
Rate of Flow GPM
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.0
Factor
1.000 1.016 1.028 1.038 1.045 1.051 1.057 1.062 1.067 1.074
Pressure Drop 3/4" Tube
Mill inches per ft.
47 96 157 230 320 420 525 650 775 1060

Note: If the calculated water flow rate through a baseboard unit in a completely designed hot water heating system is greater than the standard flow rate (1 GPM), the rating of that unit may be increased by multiplying the standard rating at 1 GPM by the factor shown for the calculated flow rate.