Estimating Heating System Efficiencies
The
following table will give you a rough idea of your current heating system
efficiency. The better the condition and the more preventive maintenance
it has had, the higher the efficiency:
|
Heating
System Type |
Efficiency |
| Natural
Gas, Propane and Oil Furnaces & Boilers |
| 30 years + |
.50-.60 |
| 15-30 years |
.60-.65 |
| 10-15 years |
.65-.70 |
| Newer Boiler |
.75-.80 |
Newer Induced
Draft Furnace
(has fan to blow exhaust up the chimney) |
.78-82 |
Newer Sealed Combustion
(usually has a PVC
air intake and exhaust)
High
Efficiency Boiler |
.85-.87 |
Newer Sealed Combustion
(usually has
a PVC air intake and exhaust)
High Efficiency Furnace |
.90-.97 |
| Electric
Resistance |
| Baseboard, Electric
Furnace, Ceiling Radiant |
1.0 |
| Heat
Pumps |
| Older Air-to-Air |
1.5-1.8 |
| Newer Air-to-Air |
2.0-2.2 |
| Water (Ground)
Source |
2.8-3.2 |
|
