Product Brochure

Residential
Slim and unobtrusive, the low pro le Heat-Base 750’s
BTU output is ideal for e cient, economical residential
installations.* The cover is a standard 22 gauge, with an
optional heavy duty 18-gauge front cover (Model 758).
*Available with
1
⁄2" Copper
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 1,060
Note: If the calculated water  ow rate through a baseboard unit in a completely designed hot water heating system is greater than the
standard  ow 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  ow rate.
Model
Nom.
Tube
Size
Fin Dim.
Thick-
ness
Fin/
Ft
Water
Rate
GPM
HOT WATER RATINGS
AVERAGE WATER TEMPERATURE °F
H W
90° 100° 110° 120° 130° 140° 150° 160° 170° 180° 190° 200° 210° 220° 230° 240°
HEAT-
BASE
750-1B
3
⁄4"
Copper
2
1
⁄8" 2
1
⁄2"
0.008 54.5
4 70* 110* 170* 230* 280* 340* 410 480 550 610 690 760 820 900 970 1,040
Natural
Finish
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 e ect.
Ratings: Heating capacities are listed in Table 1 for two  ow rates: 1 GPM and 4 GPM. The use of ratings at 4 GPM is limited to installa-
tions where the water  ow rate through the baseboard unit is equal to or greater than 4 GPM. Where the water  ow rate through the
baseboard is not known, the ratings at the standard  ow rate of 1 GPM must be used.
TABLE 1 — HEATING CAPACITIES, BTU PER HR PER LIN. FT. 65° ENTERING AIR TEMPERATURE
HEAT-BASE 750
TM