Hello!

I am buying a house and would like some suggestions on what heating system will work best for it. Here is the current situation:

• No central heating, and no radiators are installed.
• There is a gas boiler for heating water.
• The ground floor is heated by a gas heater (approximately 40 m²).
• The 1st floor has two bedrooms (11 m² and 12 m²) with no heating.
• The 2nd floor has an attic/bedroom (27 m²) with no heating.
• The current EPC rating is D, with 327 kW/m². The windows are double-glazed.

Our situation:

• We are a family of four (two adults and two kids).
• We are primarily interested in heating the ground and first floor, along with heating water, while keeping the bills reasonable.

After doing some research, I found several heating options:

Option 1:

• Continue heating the ground floor with the current gas heater.
• Use the existing gas boiler for hot water.
• Install an air-to-air heat pump with two split units on the 1st floor (~€3,000 for units + €2,000 for installation = €5,000).
• Install an air-to-air heat pump on the 2nd floor (€1,500 for the unit + €1,000 for installation = €2,500).

Total cost: €7,500

Option 2:

• Buy second-hand radiators (€1,000).
• Buy a second-hand good-quality boiler (€1,500).
• Hire someone to install both along with the necessary pipework (€5,000).

Total cost: €7,500

Option 3:

• Continue heating the ground floor with the current gas heater.
• Use the existing gas boiler for hot water.
• Install electric radiators in the bedrooms (€500).

Total cost: €500

With this option, I suspect I will end up paying a lot more in utility bills, so it's probably not viable.

My Question:

Given that the costs are similar, is it better to go with heat pumps, or should I install second-hand central heating? The costs I quoted are based on my research, so please correct me if they are inaccurate.

I found these heat pumps on Google: Klimatime.

Feel free to correct me if the quoted prices are incorrect