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10
VI. APPLICATION GUIDELINES
A. GENERAL GUIDELINES
1. The fi rst step in the design of a job is typically to
determine the heat loss. Refer to ASHRAE and
others for publications on the basic methodology
used in calculating the building or area’s heat loss.
Special attention should be paid to the building type
(architecturally) and application placement (area
use) in this procedure.
2. The second step is to decide the necessary
engineering data for design conditions such as CFM,
fi nal air temperature, quantity and location of units,
based on the specifi c Burnham Hydronics Unit
Heater model selected.
3. Burnham Hydronics steam/hot water unit heaters’
versatility offers a wide selection of outputs and
airfl ow allowing almost unlimited fl exibility in job
design.
4. Keep the following guidelines in mind when
designing any job using steam/hot water unit
heaters:
• Always direct airfl ow to regions of greatest heat
loss.
• Use louvers for adjustment of throw length and
complete directional control of airfl ow.
• Mount units at the lowest practical and allowable
level.
• Select lower CFM models for lower installation
heights and heavily occupied areas. Select higher
CFM models for areas where higher installation is
required.
• More, smaller units will provide better heat
distribution than fewer larger units.
• Watch fi nal air temperatures on units mounted at
lower levels or in heavily occupied areas to ensure
that air is warm enough to avoid drafts being felt.
• Sound classifi cations: Burnham Hydronics Unit
Heaters provide exceptional heat output while
Typical BH Unit Arrangement
considering the nuisance of a loud unit. All units
were designed to minimize sound created by airfl ow
and motor operation by careful component selection
and inlet geometry. Sound Classifi cation Table 2
shows typical rooms and their corresponding sound
class rating.
GNIDLIUBROMOORFOEPYT GNITARSSALCDNUOS
smoortseR,sreyoF,slatipsoH,seirarbiL,seciffO,sloohcS I
seitilicaFgniniDlaicremmoC,sesuohbulC,serotStnemtrapeD,smoorwohS II
sraB,smuisanmyG,serotSesuoheraW,seibboLegraL III
saerAnommoCmuidatS,spohSenihcaM,saerAgnippihS,seirotcaFllamS IIV-II
spohSnoitacirbaF,seirotcaFegraL IIV
Table 2: Sound Class Ratings*
*When placed in the paired room, the unit’s noise should be relatively comparable to the ambient sound level.