Renewable Heating Experts

Heat Pumps

Heat pumps are not a new technology, they have been used very effectively in Europe and Scandinavia for over 40 years. Green-house are experts in designing, supplying, and installing heat pump systems for homes and businesses across Ireland.

Air to Water Heat Pumps

What is an Air to Water Heat Pump?

An Air to Water Heat Pump is a direct replacement for your existing gas or oil boiler system. It comprises of an outdoor unit that looks very like an air conditioning unit which is connected to an indoor module inside your house that looks like a fridge, housing a hot water cylinder and a heat pump controller.
The heat pump system will heat your radiator or underfloor heating system using its climate control system to ensure a constant 21 degrees in your house. It will also provide hot water on demand for your showers and taps 24/7.
The heat pump system runs fully off electricity and are all tested at over 400% efficiency, meaning for every €1 you spend on electricity you will receive €4 worth of heat. We will expertly design your radiators, underfloor heating, and control systems to work seamlessly with the lower heating temperatures of the air to water heat pump.

Grants

What the SEAI will pay towards it

Increased on 3 February 2026. We complete the application for you.

Homeowners

€12,500

maximum for a house, €9,500 for an apartment

SEAI Heat Pump System Grant

Increased from €6,500 to €12,500 on 3 February 2026. Not one payment but three: the heat pump itself, a central heating upgrade, and a bonus for leaving a fossil fuel behind. The upgrade component names underfloor heating explicitly, so a heat pump and underfloor job draws on both.

Air to water, ground source, exhaust air, water to water
€12,500 for a house, €9,500 for an apartment
Air to air
€7,500. Does not provide hot water
Heat pump unit
Up to €6,500 of the total
Central heating upgrade
Up to €2,000 for new radiators or underfloor heating, where required
Renewable Heat Bonus
€4,000 when replacing an oil or gas boiler, solid fuel, or electric storage heating
Technical assessment
€200. Required for homes built before 2007, and must be done before applying
Eligibility
Home must have an MPRN and have been built and occupied before 2021

Rates checked against each administering body's published scheme page on 2026-09-25.

How an air to water heat pump works

  1. Outside airFree heat, even at 0 degrees
  2. Outdoor unitExtracts it and raises the temperature
  3. Indoor cylinderStores hot water for the house
  4. Radiators or underfloorA constant, even heat

Tested at over 400% efficiency: for every €1 of electricity, about €4 of heat.

Three types, and which one suits

We design and install all three. Which one fits depends on the house, not on what we would rather sell.

Air to Water

The most common system, and our recommendation for most homes. An outdoor unit feeds your radiators or underfloor heating and provides hot water. Grant of up to €12,500.

Exhaust Air

Suits smaller new builds and apartments, with no outdoor unit. Extracts warm stale air from bathrooms and the kitchen for heating and hot water, and doubles as the ventilation system, satisfying Part F.

Geothermal

The most efficient, reaching a COP near 5.0. Collects heat through a borehole around 150m deep, so outside temperature does not affect performance. No outdoor unit, but the highest install cost.

Why Install Heat Pumps

Benefits of Heat Pumps

Increased Home Value

A heat pump system significantly increases your home's BER rating, making it more attractive to buyers and increasing its market value. An energy-efficient home is a valuable asset in today's property market.

Cost Cutting

Heat pumps operate at over 400% efficiency, for every €1 you spend on electricity, you receive €4 worth of heat. This translates to significant savings on your heating bills compared to traditional gas or oil systems.

Planning & Saving

With SEAI grants available for heat pump installations, the upfront cost is significantly reduced. We handle all the grant paperwork and guide you through the process to maximise your savings.

Environmentally Friendly

Heat pumps use renewable energy from the air or ground, dramatically reducing your carbon footprint. By switching from fossil fuels, you're making a real difference for the environment and future generations.

Get a No-Obligation Quote Today!

Whether it's a new build or retrofit, our team will design the perfect heat pump system for your home or commercial project. Get in touch for a free consultation and SEAI grant guidance.

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Which applies to you

New build or retrofit

Different problems. We design for both.

New build

A new house has to make a renewable contribution to meet building regulations, and needs an A3 BER or better. Air to water is the straightforward answer: best comfort, lowest running cost, and simple to live with.

  • Sized to an A3 BER or better
  • Set up to run 24/7, so the house and the hot water stay warm
  • Simple for the homeowner to operate

Retrofit

Older houses are our bread and butter, and we handle the SEAI grant pack end to end. The house fabric has to pass a technical assessment, and the radiators or underfloor have to be resized for the lower flow temperatures a heat pump produces.

  • Heat loss assessed by a BER assessor before design
  • Radiators or underfloor resized to the heat loss
  • We prepare and submit the SEAI grant pack
  • We have fitted heat pumps in listed buildings and churches

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