Hayward HDF400 User Manual

17ONLYUSEGENUINEHAYWARDREPLACEMENTPARTS
51300803801REVB
Figure 7: Air from Inside Building Installation
1 sq. in. per 1,000 Btu/hr of total input
Table 3 Indoor Clearance Apply
Figure 8: Air from Outside Building Installation
Table 3 Indoor Clearance Apply
A) 1 sq. in. per 4,000 Btu/hr of total input
B) 1 sq. in. per 2,000 Btu/hr of total input
Figure 9: Air Below-Ground
(Pit for Natural Gas Installations ONLY)
1 sq. in. per 4,000 Btu/hr of total input
Table 3 Indoor Clearance Apply

Hayward HDF400 Specifications

General

Model	HDF400
Category	Gas Heater
BTU Input	400, 000 BTU
Fuel Type	Natural Gas or Propane
Heat Exchanger	Cupro-Nickel
Efficiency	84%
Ignition System	Electronic
Warranty	1 year