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Air-to-Air Heat Pump Grant: £2,500 BUS Explained
Find out how the £2,500 BUS grant for air-to-air heat pumps works, who qualifies, whole-home heating rules, hot-water requirements, multi-split design and what to check before installing.
- Last updated: August 2026
- By Phil · Heat Loss Hub
Eligible residential properties in England and Wales can now receive £2,500 towards a qualifying air-to-air heat-pump installation through the Boiler Upgrade Scheme.
But this is not simply a £2,500 grant for adding one air-conditioning unit to one room. The BUS-funded system must be designed to meet the property’s full space-heating requirement and satisfy the wider scheme rules.
For air-to-air, proving that the outdoor unit has enough total capacity is only half the design. The other half is proving that every room can actually receive the heat it needs.
KEY TAKEAWAY
A system can have enough total kW on paper and still leave parts of the property underheated if the air distribution has not been designed properly.
The £2,500 Air-to-Air Grant at a Glance
- Grant value: £2,500
- Available since: 28 April 2026
- Location: England and Wales
- Property type: Residential
- Technology: Qualifying air-to-air heat pump
- Application: Installer-led
- Installer: Appropriately MCS certified
- Space-heating requirement: The system must be sized to meet the full property heating load
- Voucher validity: typically around 3 months
- Grant basis: generally one grant per qualifying property
KEY TAKEAWAY
The £2,500 is not per indoor unit, per outdoor unit or per split system.
The air-to-air category was added to the Boiler Upgrade Scheme (BUS) in an expansion announced in November 2025, with the new grant becoming available under the scheme rules from 28 April 2026. BUS itself is not new: it first opened in May 2022 and is administered by Ofgem, Great Britain’s independent energy regulator, on behalf of the government. The scheme is installer-led — an appropriately MCS-certified installer applies for the voucher on your behalf.
What Is an Air-to-Air Heat Pump?
An air-to-air heat pump takes heat from the outdoor air and delivers it directly into the property as warm air. Most modern systems are reversible, meaning they can usually provide heating in winter and cooling in summer.
Unlike an air-to-water heat pump, an air-to-air system does not normally heat radiators, underfloor heating or a conventional hot-water cylinder. Instead, heat is delivered through indoor fan units, which might be wall mounted, floor mounted, ceiling mounted or ducted.
KEY TAKEAWAY
Air-to-air may look like air conditioning, but a BUS-funded installation is being assessed as a heating system.
Who Can Qualify for the £2,500 Grant?
A useful way to think about eligibility is as a sequence of checks.
Step 1 — Is the property in England or Wales? The Boiler Upgrade Scheme applies to eligible properties in England and Wales.
Step 2 — Is the property residential? This can potentially include houses, flats, qualifying rental properties and certain eligible self-builds. Mixed-use properties can be more complicated and should be checked before relying on the grant.
Step 3 — Is the existing heating eligible to be replaced? This can potentially include gas, oil, LPG, direct electric heating and electric storage heaters. It is not simply a grant for upgrading an existing low-carbon heating system or adding extra cooling.
Step 4 — Can the air-to-air system meet the full space-heating requirement? The proposed heat pump must be designed around the heating requirement of the whole property — considering whole-house heat loss, room-by-room heat losses, indoor-unit output, outdoor-unit capacity and air distribution.
Step 5 — Is the installer appropriately MCS certified? The BUS process is installer-led, and the installer needs to satisfy the relevant MCS requirements for the technology being installed.
Step 6 — Does the project meet the wider BUS rules? The property, system, installer and application all need to satisfy the current scheme rules. Final eligibility is confirmed through the BUS application process.
This Is a Residential Grant
The £2,500 air-to-air BUS category is specifically for residential properties. If the property has significant commercial use, mixed residential and commercial use, or unusual ownership arrangements, confirm eligibility before relying on the grant in your project budget.
KEY TAKEAWAY
The fact that an air-to-air system can technically heat a building does not automatically mean that building qualifies for the residential BUS category.
This Is Not a Grant for One Air-Conditioning Unit
This is one of the most important points. A typical example that should not be confused with a whole-home BUS installation is one split unit in the lounge while the existing gas boiler remains and other rooms continue to rely on the existing heating system. That is not the same thing as designing air-to-air as the property’s main heating system.
KEY TAKEAWAY
A single-room heating and cooling upgrade is not the same thing as a whole-home BUS heating system. The grant should not be treated as a general discount on ordinary air-conditioning work.
The System Must Meet the Full Space-Heating Requirement
A proper air-to-air heating design still needs to start with heat loss. The designer should establish whole-house design heat loss, individual room heat losses, design outside temperature and room temperature assumptions. Then the system needs to demonstrate how those loads will be met.
Removing radiators does not remove the need for a room-by-room heat-loss calculation.
Explore: Heat Loss & Heat Pump Sizing
Total Capacity vs Delivered Heat
This is one of the biggest differences between analysing air-to-air and simply looking at a headline system output. Imagine a property has a design heat loss of 7kW, and the proposed outdoor unit has a headline heating capacity of 8kW. At first glance, that may look fine. But another question remains: can enough of that 8kW actually reach each room?
There are two separate design tests. Capacity: can the system produce enough heat? Distribution: can that heat reach the rooms that need it?
KEY TAKEAWAY
Whole-house capacity does not automatically mean whole-house comfort.
The Air-to-Air Room Coverage Schedule
A useful whole-home air-to-air design should make it possible to understand how each room is heated. For example:
| Room | Heat loss | Indoor unit? | How heated? | Closed-door check |
|---|---|---|---|---|
| Lounge | 2.2 kW | Yes | Direct | Pass |
| Kitchen | 1.1 kW | No | Open-plan transfer | Assess |
| Bedroom 1 | 0.9 kW | Yes | Direct | Pass |
| Bedroom 2 | 0.8 kW | No | Landing transfer | Question |
| Bathroom | 0.6 kW | No | Supplementary heat | Check |
This is effectively the air-to-air equivalent of a radiator schedule. The important thing is not whether every room has an indoor unit. It is whether every room has a credible heating strategy.
What About Rooms Without an Indoor Unit?
Some rooms may not need their own fan unit — for example an open-plan kitchen and lounge, a small hall, landing or connected circulation space. But the design should explain where the heat comes from. Ask: what is the room heat loss, where is the heat expected to come from, is there a realistic air path, and what happens when doors are closed?
A room with a calculated heat loss still needs a credible route for that heat to arrive.
Bedrooms With the Doors Closed
Bedrooms can expose weaknesses in an air-to-air design. A bedroom may appear to receive heat from a landing, hallway or adjacent room. But what happens at night? Ask: how is each bedroom heated when everyone goes to bed and closes the doors? Also consider fan noise, airflow over beds, low fan-speed capacity, and individual control.
A design that only works with every bedroom door left open needs careful scrutiny.
Bathrooms Need Their Own Heating Plan
Bathrooms can be more difficult — they may have higher expected room temperatures, limited indoor-unit positions and specific electrical-location considerations. A design may use suitable supplementary electric heating where appropriate.
Supplementary bathroom heating does not remove the need to design the main heat-pump system around the property’s full heating demand. Ask the installer specifically: how has the bathroom heat loss been included in the design?
What About Hallways, Landings and Utility Rooms?
These spaces are easy to forget, but they still lose heat. The design should establish whether they are heated by a direct indoor unit, transfer from another area, or supplementary heating. Do not assume circulation spaces will simply become warm enough by accident.
Kitchens Need Extra Consideration
Kitchens create moisture, grease and airborne particles. Indoor units contain washable filters, but cooking vapours reaching the heat exchanger or fan can increase cleaning and servicing requirements. Positioning should be considered carefully, away from the direct path of hob and oven vapours where possible.
Multi-Split Systems: Do the Numbers Actually Add Up?
Many whole-home air-to-air installations may use a multi-split arrangement — one outdoor unit, several indoor units. But do not simply add the headline outputs of all the indoor units and assume the outdoor unit can supply that amount simultaneously.
For example: lounge unit 5kW, bedroom unit 2.5kW, bedroom unit 2.5kW. That does not automatically prove the system can provide 10kW at the same time. Ask: what heating capacity is available from the outdoor unit when the connected indoor units are operating together at the design condition?
Larger properties may also need more than one outdoor unit once heating demand, refrigerant pipe lengths and manufacturer combination limits are taken into account. Where an outdoor unit needs a new or altered position, planning requirements should be checked for the exact proposal rather than assumed.
KEY TAKEAWAY
The indoor-unit labels and the outdoor-unit capacity need to make sense as one system.
Ask for the Exact Indoor and Outdoor Unit Combination
A proposal should identify the exact outdoor model, exact indoor models, how many indoor units, and the approved combination. A description such as “five-room Mitsubishi system” is not a complete technical specification.
Multi-Split vs Multiple Single-Split Systems
There is no universal answer — both approaches can make sense.
One multi-split system: potential advantages include fewer outdoor units, a cleaner exterior and less external space required. Potential considerations: connected rooms share outdoor capacity, one outdoor-unit fault may affect several rooms, and part-load behaviour can be more complex.
Several single-split systems: potential advantages include greater independence between rooms and individual outdoor units closely matched to room loads. Potential considerations: more outdoor units, more external space, and more visible equipment.
The best arrangement depends on room loads, external space, simultaneous heating demand and how independently rooms need to operate.
What Happens When Only One Small Room Calls for Heat?
Peak heating is only one operating condition. What happens during mild weather when the lounge is warm, bedrooms are off, and one small office calls for heat? Ask: how low can the outdoor unit reduce its output when only a small part of the property requires heat? If the minimum output is too high, the system may cycle more frequently.
Wall-Mounted vs Ducted Air-to-Air
Air-to-air does not automatically mean visible high-wall units in every room.
Wall-mounted systems: potential benefits include relative simplicity, direct room heating and easy access. Potential considerations: visible equipment, airflow and indoor fan noise.
Ducted systems: potential benefits include being more discreet and able to distribute heat through multiple rooms. Potential considerations: duct routes, ceiling voids, airflow design, fan pressure, sound and maintenance.
KEY TAKEAWAY
Ducted systems move the design problem from wall-unit placement to duct design.
Airflow and Comfort Matter
Comfort is not simply a room-temperature number. Poor indoor-unit positioning can result in warm air blowing directly onto a sofa, airflow over a bed, draught sensation, uneven room temperatures, and heat short-circuiting back to the unit.
Indoor units need to be positioned around the room, not simply around the nearest empty wall.
Indoor Noise Needs Realistic Context
Air-to-air systems contain fans inside the occupied space, so sound matters. Manufacturer data may show very low sound levels at minimum fan speed. But ask: what fan speed is likely to be needed when this room is close to its design heating load? Then ask: what is the sound level at that setting?
The quietest published fan setting may not be the setting needed on the coldest night. This can be particularly important in bedrooms.
Indoor Units Need to Be Maintainable
Most indoor units require regular filter cleaning, inspection and servicing. Ask: can I reach the filters safely, is access blocked by furniture, and can an engineer service the unit easily? A position that looks neat may not be practical long term.
Cooling Is a Genuine Benefit
One major attraction of air-to-air heat pumps is that most reversible systems can provide cooling as well as heating. That can be particularly valuable in bedrooms, loft conversions, highly glazed rooms, overheating flats and south-facing spaces.
But cooling is an additional energy service, not free efficiency. If you begin cooling rooms that were never cooled before, summer electricity use may rise. That does not make cooling bad — it just means annual energy comparisons should account for it properly.
Cooling Creates Condensate
When an indoor unit cools a room, it can remove moisture from the air, and that water needs somewhere to go. For every indoor unit, consider gravity drain, condensate pipe route, condensate pump and maintenance access.
A good wall position for heating may be a poor installation position if there is no sensible condensate route.
Will I Hear the Condensate Pump?
If gravity drainage is not possible, an indoor unit may require a condensate pump — introducing noise, maintenance and another component that can fail. This is particularly relevant in bedrooms. Ask: does this indoor unit need a condensate pump, and when will I hear it operate?
Air-to-Air Does Not Replace Ventilation
Many air-to-air systems contain filters, which can help remove some particles from recirculated room air. But it is important not to confuse this with ventilation. An ordinary split heat pump generally recirculates indoor air — it does not normally replace trickle vents, bathroom extract, kitchen extract, MVHR or other fresh-air ventilation.
Recirculating and filtering room air is not the same as providing fresh-air ventilation.
What Happens During Defrost?
Air-to-air heat pumps are still air-source heat pumps. In cold, damp weather, frost can form on the outdoor heat exchanger and the system periodically needs to defrost. During that period, heating output can temporarily reduce, indoor fan behaviour may change, and the outdoor unit produces water. Defrost is normal — it should simply be understood as part of the system’s cold-weather operation.
Ask the installer where the outdoor unit will drain during defrost, and check drainage, icy surfaces, pathways and unit location.
Domestic Hot Water: The Missing Half of the System
This is one of the biggest differences between air-to-air and air-to-water. Most conventional air-to-air heat pumps do not heat your domestic hot-water cylinder. So if the existing boiler currently provides both space heating and hot water, air-to-air only solves the first part directly.
KEY TAKEAWAY
An air-to-air heating design is incomplete until somebody has answered the hot-water question.
What Are the Hot-Water Options?
There is no single answer — the right solution depends on the property.
Direct electric cylinder: simple and familiar, but the immersion uses direct resistance heating.
Heat-pump water heater: can provide more efficient water heating, but introduces its own considerations — equipment cost, location, airflow, sound and cylinder recovery.
Other electric hot-water solutions: depending on the property, other suitable non-fossil arrangements may be possible, such as heat-battery systems or point-of-use water heating.
The important thing is to design hot water deliberately rather than treating it as an afterthought.
Solar thermal and solar PV: solar thermal can heat water directly but requires roof space, specialist equipment and ongoing maintenance. For many projects, solar PV combined with an electric hot-water solution is simpler and more flexible — a suitable immersion diverter can direct surplus solar generation into the cylinder, and time-of-use electricity tariffs can allow water to be heated during cheaper overnight periods regardless of the hot-water route chosen.
Air-to-Air SCOP Is Not Whole-Home Heating and Hot-Water Efficiency
Imagine the air-to-air heat pump has a seasonal performance figure of SCOP 4.5. That relates to space heating. If domestic hot water is produced by direct immersion, the household does not therefore have a combined heating-and-hot-water seasonal performance of 4.5.
Space-heating efficiency and whole-home heating-plus-hot-water efficiency are not the same calculation. This matters when comparing annual running costs.
Replacing a Gas Combi With Air-to-Air
A combi boiler provides both space heating and domestic hot water. If it is removed, both functions need replacing. Air-to-air can replace the space-heating side, but you may now also need a hot-water cylinder, cupboard space, electrical supply, new hot-water controls and possibly new pipework.
Replacing a combi boiler with air-to-air heating may create a new hot-water installation that the property did not previously need. That additional work should be included when comparing total project costs.
Direct-Electric and Storage-Heater Homes
This is where air-to-air can become particularly interesting. A property with storage heaters, electric panel heaters, an existing electric hot-water cylinder and no wet central-heating pipework already has a separate hot-water system. Air-to-air can potentially replace the inefficient space heating without requiring a completely new system of radiators, heating pipes and wet controls.
For some direct-electric homes, air-to-air can avoid much of the disruption involved in creating an entirely new wet central-heating system.
Which Homes May Suit Air-to-Air Particularly Well?
Air-to-air can be worth serious consideration for smaller houses, flats, open-plan homes, direct-electric properties, storage-heater properties, homes without existing wet central heating, and households that value cooling. That does not mean these properties automatically qualify or automatically suit the technology, but the project economics can become very interesting.
Which Homes Can Be More Challenging?
Air-to-air can be more difficult where the property has many small closed rooms, a complicated internal layout, limited indoor-unit positions, difficult condensate routes, occupants very sensitive to fan noise, or no sensible domestic-hot-water strategy.
Suitability depends on layout as much as floor area.
£2,500 Air-to-Air vs £7,500 Air-to-Water
| Air-to-air | Air-to-water | |
|---|---|---|
| Standard BUS grant | £2,500 | £7,500 |
| Heat distribution | Warm air | Radiators / UFH |
| Cooling | Usually possible | Not normally standard |
| Domestic hot water | Separate solution normally needed | Can heat a cylinder |
| Wet heating system required | No | Yes |
| Indoor fan units | Yes | No |
KEY TAKEAWAY
The larger grant does not automatically make air-to-water cheaper. Likewise, the smaller grant does not automatically make air-to-air better value. Compare the total project, not just the grant.
Oil and LPG: £2,500 Air-to-Air vs £9,000 Air-to-Water
Eligible off-gas oil and LPG properties can currently face a particularly interesting choice. Depending on the property and scheme requirements, air-to-air may receive £2,500 while qualifying air-to-water or ground-source may receive £9,000 during the temporary uplift period. That is a large grant difference — but total installation costs can also be very different.
Air-to-water may require radiator upgrades, pipework, a cylinder and hydraulic equipment. Air-to-air may require several indoor units, refrigerant pipework, condensate management and a separate hot-water system.
Compare total installed cost and whole-home design — not grant value alone.
What Does a Whole-Home Air-to-Air System Cost?
Costs vary enormously between properties. Government communications have suggested that a typical installation in a flat or small house may cost around £4,500, but that figure should not be treated as a quotation for any individual property. The final price depends on several factors:
- The property’s heat loss and number of rooms
- The number and capacity of indoor and outdoor units
- Wall-mounted, floor-mounted, cassette or ducted equipment
- Refrigerant pipe lengths and routes
- Condensate drainage and electrical work
- Scaffolding, access and making good
- Planning requirements
- Controls, system design and commissioning
KEY TAKEAWAY
Compare the £2,500 grant against the full cost of creating a compliant whole-house heating system. The important question is not simply how much grant is available, but what system the property genuinely needs.
Electrical Load Needs a Whole-System Check
An air-to-air installation can introduce several new electrical loads — potentially one or more outdoor units, a hot-water cylinder, a heat-pump water heater, bathroom heaters and other supplementary electric heating. Then add existing loads such as an EV charger, electric shower, induction hob or battery inverter.
Ask: what is the maximum expected electrical demand of the complete heating and hot-water arrangement? This should be considered as part of the project rather than treating each appliance in isolation.
Who Handles the DNO Requirements?
Any relevant electrical notification or DNO requirement should have a clear owner. Ask the installer: is anything required, who deals with it, is it included in the quotation, and could it delay the installation?
F-Gas and MCS Are Not the Same Thing
Air-to-air systems commonly involve refrigerant pipework, so appropriate refrigerant competence and F-Gas requirements may apply. BUS introduces another layer: the business also needs to satisfy the relevant MCS requirements for the funded installation.
Being qualified to install air conditioning does not automatically mean an installer can deliver a BUS-funded whole-home air-to-air system. This distinction is important when comparing conventional air-conditioning contractors with BUS installers.
Who Designed the Whole-Home Heating System?
Ask: who completed the room-by-room heat-loss calculation and confirmed that the combined air-to-air system can meet the full property heating requirement? The answer might be the installer, a designer, or a separate technical team. That is fine — what matters is that someone has taken responsibility for the heating design.
Product Eligibility vs System Eligibility
An individual air-to-air product may satisfy relevant equipment requirements. That does not automatically prove that the whole project qualifies. The system still needs to satisfy requirements relating to the property, installer, design, equipment combination and heating capacity.
A qualifying outdoor unit is not the same thing as a qualifying whole-home system design.
One £2,500 Grant per Property — Not per Unit
This is an easy area to misunderstand. Imagine a property has five indoor units and two outdoor units. That does not automatically mean five £2,500 grants or two £2,500 grants. BUS generally provides one grant for the qualifying property, not one grant for every indoor or outdoor unit.
The grant supports the qualifying heating project.
How the £2,500 Should Appear on the Quote
The grant should be easy to identify. For example: total installation price £6,500, BUS grant −£2,500, customer contribution £4,000.
The £2,500 should not be disguised as an installer discount, seasonal offer, or manager discount. The grant should reduce what you pay; it is not normally money you claim back later.
The Installer Applies for BUS
The process is installer-led. A typical journey: you find an appropriately MCS-certified installer, the property is surveyed, the whole-home air-to-air design is produced, you agree the quote, the installer submits the BUS application, you complete any required homeowner confirmation, and the grant is deducted from the eligible installation price.
How Long Is the Voucher Valid?
Air-to-air BUS vouchers typically have a validity period of around three months. That means the installer should have a realistic plan for equipment availability, installation date and commissioning. Ask this before committing if there is a long lead time.
Does the £2,500 Grant End in March 2027?
Do not confuse the air-to-air grant with the temporary £9,000 oil and LPG uplift. The 31 March 2027 date relates to the temporary £9,000 uplift for qualifying off-gas oil/LPG properties moving to eligible air-to-water or ground-source systems. The £2,500 air-to-air category is a separate part of BUS.
KEY TAKEAWAY
Do not confuse the temporary £9,000 oil/LPG uplift with the separate £2,500 air-to-air grant. Always check current scheme rules before committing because grant values and conditions can change.
Grant Eligible vs Air-to-Air Suitable
| Grant question | Design question |
|---|---|
| Is the property residential? | What is each room heat loss? |
| Is the existing heating eligible? | Which rooms have indoor units? |
| Is the product eligible? | Can every room receive enough heat? |
| Is the installer appropriately MCS certified? | What is the simultaneous multi-split output? |
| Does the project meet BUS rules? | How will domestic hot water be produced? |
Passing the left-hand column does not answer the right-hand column. A property can potentially qualify for BUS and still be a poor candidate for a particular air-to-air design.
What About Combined Air-to-Air and Air-to-Water Heat Pumps?
Newer heat pump technologies are beginning to combine air-to-air heating and cooling with conventional wet central heating and domestic hot water.
Examples include the Samsung EHS Quint and Daikin X Series.
These systems offer a different approach from a conventional air-to-air installation because they also supply water-based heating equipment.
Their MCS certification and Boiler Upgrade Scheme eligibility must be established for the exact proposed installation. Homeowners should not assume that a combined system qualifies for either the £2,500 air-to-air grant or the £7,500 air-to-water grant.
Explore our independent guides to the Samsung EHS Quint and Daikin X Series for further information.
Frequently Asked Questions
Yes. The air-to-air BUS category is currently available for qualifying residential projects.
No. BUS generally provides one grant for the qualifying property.
Not simply as a partial heating and cooling addition. The BUS-funded air-to-air system must be designed around the full property space-heating requirement.
Not necessarily. But every room still needs a credible heating solution. If a room does not have an indoor unit, the designer should explain how its calculated heat loss will be met.
Yes. Many reversible air-to-air systems can provide both heating and cooling.
Most conventional air-to-air systems do not. A separate domestic-hot-water solution will normally be required.
Potentially, as part of an appropriate non-fossil hot-water arrangement. The complete project should be designed rather than assuming space heating is the only requirement.
Do not assume that retaining a fossil-fuel boiler as part of the normal system will satisfy BUS requirements. The proposed configuration should be checked before relying on the grant.
The air-to-air BUS category is residential. Commercial projects do not qualify through this residential air-to-air category.
Potentially, provided the property and installation satisfy the wider scheme requirements.
Potentially, where the project meets the relevant BUS self-build requirements.
Generally not simply because the property needs several units. The grant operates on a qualifying-property basis rather than per indoor unit.
No. The temporary £9,000 uplift applies to qualifying air-to-water and ground-source installations. Air-to-air remains a separate £2,500 category.
Normally, no. The grant is intended to replace an existing fossil-fuel or eligible electric heating system. If you already have an air-to-water heat pump, you have already made the transition the scheme is designed to support. Adding air-to-air for cooling may still be worthwhile, but it would generally not qualify for this particular grant.
No. Only one Boiler Upgrade Scheme voucher can generally be redeemed for each legally separate property. Using the £2,500 voucher for an air-to-air heat pump means you would not be able to later claim another voucher for an air-to-water heat pump at the same property, so this is worth thinking through carefully before committing.
Final Air-to-Air BUS Checklist
Before agreeing to a BUS-funded air-to-air installation, ask: is the property residential; is the existing heating eligible; is the proposed system eligible under BUS; is the installer appropriately MCS certified; has a room-by-room heat-loss calculation been completed; does every room have a credible heating route; have bedrooms been considered with the doors closed; how are bathrooms heated; does the outdoor unit have enough simultaneous capacity; what happens when only one small room calls for heat; how will domestic hot water be produced; what is the total electrical demand; is indoor sound acceptable; are condensate routes practical; is the £2,500 grant shown separately on the quote; and does the final system genuinely replace the property’s whole space-heating requirement?
KEY TAKEAWAY
If any of those answers are unclear, investigate before committing.
Final Takeaway
The £2,500 BUS grant makes air-to-air heating a much more serious option for some UK homes, particularly properties without an existing wet central-heating system. But whole-home air-to-air design is not simply about adding up the kW on several indoor units.
Every room needs a credible heating solution. The outdoor system needs enough simultaneous capacity. The hot-water strategy needs to be clear. And the practical details of noise, airflow, condensate, electrics and controls still matter.
First establish whether the property qualifies for the grant. Then establish whether the proposed air-to-air system can genuinely replace the heating throughout the home.
START YOUR HEAT PUMP JOURNEY
The grant tells you how much financial support may be available. It does not tell you whether the indoor units are in the right rooms, whether the multi-split capacity is adequate, whether bedrooms will stay warm, or whether air-to-water might suit the property better. Heat Loss Hub can review heat-loss calculations, room coverage, indoor-unit selection, outdoor-unit sizing and hot-water strategy.