Bosch Greentherm 5300 5.3 GPM Tankless Water Heater (Propane)
Model WTG-5300-LP
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Btu
120000
Venting
PVC Direct Vent
Fuel Type
Propane
Tank Type
Tankless
Capacity Gpm
5.3
Energy Factor
0.94
Bosch Greentherm 5300 5.3 GPM Tankless Water Heater (Propane) Review
The Bosch Greentherm 5300 5.3 GPM Tankless Water Heater (Propane) is Bosch's mid-tier propane condensing tankless. "5300" identifies the 130K BTU class; 5.3 GPM rated capacity.
Specs: 130,000 BTU LP input, UEF 0.93 condensing, 5.3 GPM at a 35°F rise, stainless steel heat exchanger, PVC condensing venting. 15-year warranty on heat exchanger.
The 130K BTU class is sized for 1-2 bath warm-climate homes or 1-bath cold-climate homes with sequential demand. About $1,800 unit, $3,400 installed for propane retrofit including LP regulator upsizing.
Right buyer: rural propane home with 1-2 bath demand wanting Bosch engineering at moderate capacity.
Pros
- On-demand operation at 5.3 GPM — no standby heat loss; unlimited hot water if demand is within flow-rate capacity
- Strong UEF 0.94 efficiency — approximately 20% lower annual operating cost vs 0.62 standard
- 15-year warranty — top-tier coverage for residential water heaters
Cons
- Requires dedicated 120K BTU gas supply line — undersized gas piping is the leading cause of flow-rate shortfalls
Full Specifications
Brand
Bosch
Model Number
WTG-5300-LP
Btu
120000
Venting
PVC Direct Vent
Fuel Type
Propane
Tank Type
Tankless
Capacity Gpm
5.3
Energy Factor
0.94
Warranty Years
15
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