Hybrid and geothermal heating systems (EAHP, geothermal heat)
Hybrid and geothermal
heating systems
(EAHP, geothermal heat)
Hybrid systems for housing companies – cost efficiency and energy savings
SL Valvonta Oy designs hybrid systems completely independently. We do not sell equipment, so our solutions are always based on what is technically best and most economically viable specifically for your housing company. This sets us apart from operators in the industry focused on equipment sales.
Exhaust Air Heat Pumps (EAHP)
An exhaust air heat pump utilizes the heat energy from the building’s exhaust air, which would otherwise be wasted. Through energy recovery, an EAHP can produce heat for:
- Preheating domestic water
- Supplementary heating for the heating network
- Supporting the control of a hybrid system alongside district heating
Properly sized, an EAHP system can generate significant savings in annual heating costs.
SL Valvonta handles the entire process:
- Analysis of the property’s energy consumption
- Calculation of heat loads
- Comparison of equipment solutions
- Competitive bidding for contractors
- Supervision and commissioning
An EAHP works excellently together with heating network balancing which ensures that the system operates at optimal temperatures.
Geothermal heating systems
Geothermal heat utilizes the heat energy stored in the ground. Geothermal heat can also be part of a hybrid system, or it can be used to cover the majority of a property’s energy needs.
Geothermal heat brings to heat production:
- The utilization of renewable energy
- The opportunity for heating energy savings
SL Valvonta handles:
- Sizing of boreholes
- Technical selection of heat pumps
- Control and automation design
- Contract calculation and bid comparisons
- Site supervision and warranty inspections
Benefits of a hybrid system for a housing company
1. Managing energy costs
A hybrid system combines the energy savings brought by heat recovery and the reliability of district heating.
2. Investments can be made in phases
A hybrid system can be started by designing district heating equipment to be compatible with a hybrid system and later supplemented with, for example, an EAHP system.
3. Better energy efficiency
Both EAHP and geothermal heat reduce the building’s energy consumption and emissions.
4. Reliability
District heating continues to act as a backup system, which minimizes downtime.
Benefits of a geothermal heating system for a housing company
1. Energiakustannusten hallinta
In a geothermal heating system, the majority or all of the heating energy is produced with renewable energy. Most of the utilized energy is free energy directly from the ground.
2. Better energy efficiency
Maalämpöjärjestelmien hyöty tulee ilmaisen maalämmön käytöstä.
Key efficiency metrics:
- COP (Coefficient of Performance): Indicates the instantaneous efficiency under specific conditions. For example, a COP of 4 means that 1 kilowatt (kW) of electricity produces 4 kW of heat.
- SCOP or SPF (Seasonal COP / Seasonal Performance Factor): Indicates the annual efficiency, i.e., how efficiently the pump operates throughout the entire year (taking into account heating and domestic water).
- A typical annual efficiency in Finland is often between 3.0 and 4.5.
- The higher the number, the less electricity the device consumes.
As part of comprehensive heating system development
A geothermal and hybrid system works best when the entire heating infrastructure is in balance.
To ensure a good outcome, we also examine:
- The condition and control of district heating equipment
- External piping and transmission lines
- Construction and supervision processes, so that implementation proceeds according to plans and energy efficiency goals
Are you interested in a hybrid system?
We design and manage hybrid system projects for housing companies and properties throughout Finland. You will receive an independent, technically justified solution from us that minimizes risks and maximizes savings.