Heating, domestic hot water and pipes in one plan
When an air-to-air heat pump starts the saving idea, an air-to-water heat pump can be the next step
Many homeowners first think about an air-to-air heat pump when they want to save on heating. It is a fast and useful way to reduce the load on electric heating and add cooling. But if the goal is to save more on the whole heating system and domestic hot water, an air-to-water heat pump can often be the more complete solution.
An air-to-water heat pump uses energy from outdoor air and transfers it to water-based heating and domestic hot water. That is why domestic water pipes, the technical room, radiators, the water tank and pipe changes are worth reviewing at the same time.
Air-to-air heat pump
A quick way to add heating and cooling. Good when you want more comfort and lower electricity use.
Air-to-water heat pump
When replacing oil, electric or another old heating system, an air-to-water heat pump can heat the house and produce domestic hot water.
Pipes and radiators
Savings do not come from the heat pump alone. Domestic water pipes, radiators and the technical room decide how well the new system works in practice.
Why replacing only the heat pump is not always enough
A new heat pump can be efficient, but old building services can eat part of the benefit. If domestic water pipes are near the end of their life or radiators require water that is too hot, the system may not reach its best efficiency. Then part of the savings disappears into pipework, heat distribution and technical room limitations.
Domestic water pipes and home insurance
Replacing old domestic water pipes reduces the risk of water damage and can be important information for an insurance company. The price, deductible and terms of home insurance always depend on the insurer, but updated pipework can help when the risk level of a house is assessed.
At the same time, domestic hot water, valves, the water tank and technical room pipework can be made clearer and easier to maintain.
Radiators protect the heat pump savings
An air-to-water heat pump is most economical when it can produce lower-temperature water. If old radiators are too small or poorly sized, the system has to raise the water temperature. Efficiency drops and part of the new heat pump savings is lost.
Correctly sized radiators or another suitable water-based heat distribution system help keep the air-to-water heat pump efficient.
VILP, pipes and radiators as one investment
When the heating system is replaced, the smartest solution is not always a single device. Often the best result comes from looking at the whole chain: outdoor unit, indoor unit, water tank, domestic water pipes, radiators, valves, controls and technical room. Then the renovation is not only a new heat pump, but a system that protects the value of the investment for years.
A one-time renovation that can start paying itself back
A well planned heating renovation can feel like a big decision at first, but that is exactly why it should be treated as an investment rather than only an expense. When old oil heating or expensive electric heating is replaced with a correctly sized air-to-water heat pump, and domestic water pipes and radiators are checked at the same time, the monthly heating costs can fall significantly.
In a suitable property, the payback period can be around 3-4 years. After that, the system is no longer only paying itself back; it can keep producing savings every heating season. A modern heating system, renewed domestic water pipes and a clean technical room can also improve the appeal and value of the house when it is sold.
The exact profitability depends on the house size, current heating method, energy use, radiators, domestic hot water needs and the scope of the renovation. That is why the best solution is always estimated from the property details.
Example: what can changing the heating system mean?
A customer may arrive on the site to buy an air conditioner, but the bigger saving may come from changing the whole heating method. Oil heating, wood heating, electric heating and in some cases even district heating are worth reviewing when the goal is to reduce monthly housing costs.
2000 l x 2 €/l
10000 kWh x 0.18 €/kWh
in this example house
with a 10000 € renovation
Old system
Oil heating using 2000 litres per year at 2 € per litre means about 4000 € in annual energy cost. If old domestic water pipes and weak radiators remain, future renovation risk stays in the house.
New system
If an air-to-water heat pump uses about 10000 kWh of electricity per year at 0.18 €/kWh, the energy cost is about 1800 €. The difference in this example is about 2200 € per year, so a 10000 € investment can pay back in about 4-5 years.
This is an example calculation. The real saving depends on the house, current consumption, electricity price, hot water use, radiators and the scope of the renovation.
What can the service include?
- Replacement of domestic water pipes and water lines
- Planning an air-to-water heat pump renovation to replace the current heating system
- Planning water-based heat distribution and replacing radiators when needed
- Technical room, water tank, valve and pipework changes
- Plumbing work related to heat pump and heating system renovations
Who is this for?
This is especially worth checking for detached houses with old oil heating, high electricity use, an ageing technical room, old domestic water pipes or radiators that no longer suit modern low-temperature heating. If an air-to-air heat pump feels useful but is not enough as the main heating method, an air-to-water heat pump may be the right direction.
Service area
We mainly serve Lahti, Nastola, Hollola, Heinola, Vääksy, Orimattila and the wider Päijät-Häme area. Send the property details in advance so we can estimate the scope and the best way to proceed.
Ask for an estimate
Tell us the age of the house, current heating system, heated area, age of domestic water pipes, radiator condition and what you would like to renew. We will help decide whether to start with an air-to-air heat pump, an air-to-water heat pump or a full pipe and radiator estimate.