Filter
Top Products
1-1/4
2-1/2
8-1/2
5
9/16”
MOUNTING
HOLES 4X
H WATER INLET
H WATER OUTLET
22
12-3/4
6-3/4
32
2-3/4
13
4-1/2
6-3/4
7
25-3/4
3/4” NPT PVC CONDENSATE
DRAIN CONNECTION
G GAS
7/8” ELECTRICAL
CONNECTIONS
K FLUE CONNECTION
T COMBUSTION AIR
CONNECTION
(OPTIONAL)
LEFT VIEW FRONT RIGHT VIEW REAR
TOP VIEW
F
E
A
1° JACKET TOP SLOPE
V
TM
MENURESET
SCROLL
SCROLL
ENTER
ESC
5
Xtremely Small Footprint
Ratings shown are for elevations up to 10,000 feet. For installations at elevations above
2,000 feet, derate may apply, please consult the factory for additional instructions.
CLEARANCES
Front 24” 24”
Rear 24” 24”
Right 0” 0”
Left 0” 0”
Top 12” 24”
Floor 0” ---
Vent 1” ---
Certified
Minimum
Service
Minimum
*Do not install on carpeting
Note: Local codes may require increased clearances
Heater
Side
Note: Current draw (Amps) is for pump only
Water hardness grains per gallon
Soft = 0-4 • Medium = 5-15 • Hard = 16-25
Water above 15gpg requires water softner.
Model
MBTUH
Input
Boiler
Output Efficiency
Water Heaters
Output Efficiency
MBTUH
Input
Minimum
Input
MBTUH
300 300 282 94% 300 282 94% 60
500 500 470 94% 500 470 94% 100
850 850 799 94% 850 799 94% 170
Model
Dimensions (in.)
A
Length
Amps*
PHYSICAL DATA
300 28 - 1/4 16 - 1/2 27 - 9/16 3/4 1 - 1/2 4 4 3 410 6.6 3
500 37 - 1/4 16 - 1/2 36 - 1/4 1 1 - 1/2 4 4 3 505 7.9 4
850 54 - 1/4 28 53 - 9/16 1 - 1/4 2 6 6 19 - 3/8 580 9.5 5
Foot-
Print
(ft
2
)
Ship
Weight
(lbs.)
E
F
Mounting
G
NPT
H
NPT
K
Flue Ø
T
C/A
Ø
V
300 1/8 1.3 1/4 5.7
500 1/8 1.3 1/2 6.9
850 1/2 6.9 1 14.0
Soft
Water Heater Pump Sizes
HardMedium
HP Amps HP AmpsHP Amps
XFyre
Model
*Current Draw is for heater only.
(Supply breaker must have delayed trip.)
Do not use when
hardness exceeds
15 grains per gallon