Back to Blog
Interested to find out more?
Explore for yourself how to optimise retrofit solutions for cooling by ROI, solution or budget.
TRY THE INTERACTIVE DEMO
Our Ten Cooling and Overheating Fixes for Building and Estate Managers
For decades, British buildings were designed to solve one problem: keep the cold out. Thick walls, small windows, low ceilings, buildings huddled together for warmth. It worked brilliantly, for a climate that no longer exists.
2025 was the UK's warmest and sunniest year since records began in 1884, with a mean temperature of 10.09°C. 2026 didn't pause to let that record settle. By 15 July, this year had already beaten 1976's entire tally of days above 30°C, and become the first year on record to hit 35°C in May, June and July alike. Met Office scientists have said a summer as hot as 2025 is now roughly 70 times more likely than it would be without human-caused emissions. This isn't a blip. It's the new operating environment for every estate director in the country.
Later in this piece, we rank the ten highest-return measures available today, several of which need next to no capital outlay. But first, here's why the problem has arrived faster than most estates are ready for.
The city makes it worse.
Concrete, glass and tarmac soak up heat all day and release it slowly through the night: the urban heat island effect. Research from the University of Birmingham modelling a West Midlands heatwave found this effect alone accounted for roughly half of the 130 heat-related deaths recorded. Night-time temperatures in dense urban centres can run up to 7°C hotter than the surrounding countryside, precisely when buildings and the people in them most need to cool down and can't.
And most non-domestic buildings simply aren't built to cope.
Britain's default cooling strategy has predominantly been passive: shade, cross-ventilation and thermal mass. It's cheap, it's sustainable, and where a building was designed with those in mind, it still works well for most of the year. The trouble is that most of our buildings simply weren't designed or built to meet today's passive cooling demands. CIBSE's TM52 methodology, the industry standard for assessing overheating risk in offices, schools, hospitals and universities, points to a blunt conclusion: as the climate warms, the risk of buildings failing to stay comfortable through summer is set to double by 2050. That means a lot of retrofit work is needed, and at pace: official recommendations put air conditioning in hospitals and care homes within a decade, and schools within 25 years. That's a lot of hot classrooms and wards between now and then, and any fix needs to weigh its capital and operational cost against the energy bills and carbon it could otherwise drive up.
Then there's the period estate.
Universities, banks and public institutions are often custodians of genuinely beautiful, genuinely historic buildings: solid brick and stone structures that quietly absorbed heat for a century of milder summers. Many of these buildings are also uninsulated so whilst it helps with overheating in summer it creates significant heating requirement in the winter. Listed status, conservation constraints and the sheer cost of adapting heritage fabric make these buildings some of the hardest, and most urgent, to fix.
There's no single fix, and that's good news.
The most effective first moves are usually the cheapest ones. External shading and solar control film stop the sun's heat getting in at all. Reflective roof coatings cool down the top-floor and single-storey spaces that tend to fail first. Night purge ventilation, opening the building up overnight to flush out the day's heat, works brilliantly, especially paired with exposed thermal mass rather than fighting against it. Behind the scenes, a BMS re-commission, correcting the drifted sensors and simultaneous heating-and-cooling that quietly plague most estates, is very often the single highest-value measure available, and it costs next to nothing.
How our ten highest-return measures stack up
Here's how the ten highest-return measures stack up, based on typical 2026 UK installed costs:
Rank | Measure | Typical installed cost | Energy-only payback | Why it matters |
1 | Seasonal commissioning & retro-commissioning | £2–£8/m² (roughly £3,000–£20,000 per site) | Often under 1–3 years | Corrects the scheduling faults, failed sensors and simultaneous heating-and-cooling that cause most overheating, for next to no capital. |
2 | Reversible ceiling & circulation fans | £250–£800 per fan (roughly £5–£20/m²) | Often under 1–3 years vs local AC | Air movement raises the comfortable temperature by 2–3°C. High comfort return per pound, and often removes the need for mechanical cooling altogether. |
3 | Free cooling & air-side economiser | £5–£20/m² of serviced area | Roughly 1–4 years | Uses cool outside air before any mechanical plant switches on. A large reduction for low capital wherever an air handling unit is already in place. |
4 | BMS upgrade & re-commissioning | £15–£60/m² (re-commissioning alone: £2–£8/m²) | Roughly 1–5 years | Fixes the commonest causes of overheating: drifted sensors, failed dampers, heating and cooling fighting each other. Usually the single highest-value measure available. |
5 | Night purge ventilation | Controls £2–£10/m²; secure openings/fans £20–£80/m² | 1–5 years (controls only); 5–12 years with new openings | Flushes the day's heat out overnight so the building starts each morning cool. Most effective paired with exposed thermal mass. |
6 | Reflective roof coating | £15–£40/m² of roof | Roughly 3–8 years where cooling-led | Keeps roof surface temperature down. One of the best-value fixes for the top-floor and single-storey spaces that overheat first. |
7 | Solar control glazing film | £45–£100/m² of glazing | Roughly 4–10 years if air-conditioned | Cuts solar gain through the glass with minimal disruption. The answer for facades where external shading won't get planning consent. |
8 | Automated solar-responsive shading control | £100–£300 per opening (controls); £300–£1,000 motorised | Roughly 5–15 years, energy-only | Manual blinds are usually left in the wrong position. Automation captures most of the shading benefit that's otherwise lost. |
9 | Hybrid ventilation system | £60–£180/m² of serviced area | Roughly 5–15 years; can avoid full AC | Mixed-mode operation is a recognised overheating strategy that avoids committing the asset to full mechanical cooling. |
10 | External shading to reduce solar gain | £250–£700/m² of shaded glazing | 8–20 years energy-only; 3–10 years including avoided cooling | Stops solar gain before it enters the building at all. Usually the most effective passive measure available, where access and planning allow. |
Costs and paybacks are indicative planning allowances, excluding VAT: confirm suitability and pricing against the building's measured energy profile and a competitive quotation before committing.
Only once those routes are exhausted does it make sense to reach for mechanical cooling: a VRF system for a stubborn hotspot, or a reversible air-to-air heat pump that cools in summer and heats in winter. Both are effective, and both will push up your energy consumption. Pairing the units with on-site solar and battery storage can offset that, delivering free, low-carbon electricity to run them. The trade-off is capital cost: on energy savings alone, the payback often runs longer than a finance director would like. Which is exactly why the case for these measures needs to rest on more than the energy bill: comfort, resilience and avoided future cooling capacity all belong in the business case too.
Using live data can mean smarter, faster, validated savings.
None of this is worth doing on a hunch, and it's certainly not worth approaching building by building with an in-person survey. The traditional route is slow, expensive, and often out of date before the report lands. Live, comparable data replaces all of that: one evidence base, continuously refreshed, covering every building on the same terms. And this is where Predict comes in.
Find out more about Predict
Grants can accelerate this, and your finance director will love it.
It also means you're ready the moment funding is. Resilience grants, retrofit funding and adaptation schemes are becoming more common as the climate case builds, and they tend to move fast, rewarding whoever can show up with the evidence already assembled.
Want to know which schemes are open right now?
We've mapped the current UK funding routes for cooling and overheating measures, and why live data is often the only way to move fast enough to catch them, in a companion article.
Read: The Funding Routes Worth Knowing, and Why Speed Wins here
The estates that get ahead of this aren't the ones spending the most. They're the ones who know, building by building, exactly where the risk sits: which roof, which wing, which lecture theatre or branch is closest to failing, and what it would actually cost to fix. That's a live-data question, not a guesswork one. When every building in your estate is measured on the same terms, you can finally answer the question that matters: which building, which intervention, gets the next pound.
Your first step doesn't need to be expensive. It needs to be clear.
OptimiseAI's Rapid Estate Review gives you a fast, evidence-based snapshot of overheating risk and cooling readiness across your entire portfolio, at a fraction of the cost of a traditional survey. Pair it with our Costing Plan and you'll walk away with a prioritised, fundable action plan: not an ambition to “adapt,” but a clear, costed order of operations.
British summers have changed. Your estate strategy can too, and it can start with a single, cost-effective cooling action plan.
References
Office (2026), “2025 is a double-record breaker: UK's warmest and sunniest year on record”, metoffice.gov.uk
Met Office (2026), “Summer 2026 so far: A look at the season at the halfway point”, metoffice.gov.uk/blog
Met Office (2025), “Summer 2025 is the warmest on record for the UK”, metoffice.gov.uk
BBC News, “How the UK's extreme heat is shifting the conversation about air-con”, bbc.co.uk (July 2026)
University of Birmingham heatwave modelling, cited in BBC News (as above)
CIBSE TM52, “The limits of thermal comfort: avoiding overheating in buildings”, cibse.org
OptimiseAI internal scenario analysis, August 2026: cost and payback figures are indicative UK 2026 planning allowances
Chat to us
Copyright ©
2026
optimise-ai.com
Back to Blog
Our Ten Cooling and Overheating Fixes for Building and Estate Managers
For decades, British buildings were designed to solve one problem: keep the cold out. Thick walls, small windows, low ceilings, buildings huddled together for warmth. It worked brilliantly, for a climate that no longer exists.
2025 was the UK's warmest and sunniest year since records began in 1884, with a mean temperature of 10.09°C. 2026 didn't pause to let that record settle. By 15 July, this year had already beaten 1976's entire tally of days above 30°C, and become the first year on record to hit 35°C in May, June and July alike. Met Office scientists have said a summer as hot as 2025 is now roughly 70 times more likely than it would be without human-caused emissions. This isn't a blip. It's the new operating environment for every estate director in the country.
Later in this piece, we rank the ten highest-return measures available today, several of which need next to no capital outlay. But first, here's why the problem has arrived faster than most estates are ready for.
The city makes it worse.
Concrete, glass and tarmac soak up heat all day and release it slowly through the night: the urban heat island effect. Research from the University of Birmingham modelling a West Midlands heatwave found this effect alone accounted for roughly half of the 130 heat-related deaths recorded. Night-time temperatures in dense urban centres can run up to 7°C hotter than the surrounding countryside, precisely when buildings and the people in them most need to cool down and can't.
And most non-domestic buildings simply aren't built to cope.
Britain's default cooling strategy has predominantly been passive: shade, cross-ventilation and thermal mass. It's cheap, it's sustainable, and where a building was designed with those in mind, it still works well for most of the year. The trouble is that most of our buildings simply weren't designed or built to meet today's passive cooling demands. CIBSE's TM52 methodology, the industry standard for assessing overheating risk in offices, schools, hospitals and universities, points to a blunt conclusion: as the climate warms, the risk of buildings failing to stay comfortable through summer is set to double by 2050. That means a lot of retrofit work is needed, and at pace: official recommendations put air conditioning in hospitals and care homes within a decade, and schools within 25 years. That's a lot of hot classrooms and wards between now and then, and any fix needs to weigh its capital and operational cost against the energy bills and carbon it could otherwise drive up.
Then there's the period estate.
Universities, banks and public institutions are often custodians of genuinely beautiful, genuinely historic buildings: solid brick and stone structures that quietly absorbed heat for a century of milder summers. Many of these buildings are also uninsulated so whilst it helps with overheating in summer it creates significant heating requirement in the winter. Listed status, conservation constraints and the sheer cost of adapting heritage fabric make these buildings some of the hardest, and most urgent, to fix.
There's no single fix, and that's good news.
The most effective first moves are usually the cheapest ones. External shading and solar control film stop the sun's heat getting in at all. Reflective roof coatings cool down the top-floor and single-storey spaces that tend to fail first. Night purge ventilation, opening the building up overnight to flush out the day's heat, works brilliantly, especially paired with exposed thermal mass rather than fighting against it. Behind the scenes, a BMS re-commission, correcting the drifted sensors and simultaneous heating-and-cooling that quietly plague most estates, is very often the single highest-value measure available, and it costs next to nothing.
How our ten highest-return measures stack up
Here's how the ten highest-return measures stack up, based on typical 2026 UK installed costs:
Rank | Measure | Typical installed cost | Energy-only payback | Why it matters |
1 | Seasonal commissioning & retro-commissioning | £2–£8/m² (roughly £3,000–£20,000 per site) | Often under 1–3 years | Corrects the scheduling faults, failed sensors and simultaneous heating-and-cooling that cause most overheating, for next to no capital. |
2 | Reversible ceiling & circulation fans | £250–£800 per fan (roughly £5–£20/m²) | Often under 1–3 years vs local AC | Air movement raises the comfortable temperature by 2–3°C. High comfort return per pound, and often removes the need for mechanical cooling altogether. |
3 | Free cooling & air-side economiser | £5–£20/m² of serviced area | Roughly 1–4 years | Uses cool outside air before any mechanical plant switches on. A large reduction for low capital wherever an air handling unit is already in place. |
4 | BMS upgrade & re-commissioning | £15–£60/m² (re-commissioning alone: £2–£8/m²) | Roughly 1–5 years | Fixes the commonest causes of overheating: drifted sensors, failed dampers, heating and cooling fighting each other. Usually the single highest-value measure available. |
5 | Night purge ventilation | Controls £2–£10/m²; secure openings/fans £20–£80/m² | 1–5 years (controls only); 5–12 years with new openings | Flushes the day's heat out overnight so the building starts each morning cool. Most effective paired with exposed thermal mass. |
6 | Reflective roof coating | £15–£40/m² of roof | Roughly 3–8 years where cooling-led | Keeps roof surface temperature down. One of the best-value fixes for the top-floor and single-storey spaces that overheat first. |
7 | Solar control glazing film | £45–£100/m² of glazing | Roughly 4–10 years if air-conditioned | Cuts solar gain through the glass with minimal disruption. The answer for facades where external shading won't get planning consent. |
8 | Automated solar-responsive shading control | £100–£300 per opening (controls); £300–£1,000 motorised | Roughly 5–15 years, energy-only | Manual blinds are usually left in the wrong position. Automation captures most of the shading benefit that's otherwise lost. |
9 | Hybrid ventilation system | £60–£180/m² of serviced area | Roughly 5–15 years; can avoid full AC | Mixed-mode operation is a recognised overheating strategy that avoids committing the asset to full mechanical cooling. |
10 | External shading to reduce solar gain | £250–£700/m² of shaded glazing | 8–20 years energy-only; 3–10 years including avoided cooling | Stops solar gain before it enters the building at all. Usually the most effective passive measure available, where access and planning allow. |
Costs and paybacks are indicative planning allowances, excluding VAT: confirm suitability and pricing against the building's measured energy profile and a competitive quotation before committing.
Only once those routes are exhausted does it make sense to reach for mechanical cooling: a VRF system for a stubborn hotspot, or a reversible air-to-air heat pump that cools in summer and heats in winter. Both are effective, and both will push up your energy consumption. Pairing the units with on-site solar and battery storage can offset that, delivering free, low-carbon electricity to run them. The trade-off is capital cost: on energy savings alone, the payback often runs longer than a finance director would like. Which is exactly why the case for these measures needs to rest on more than the energy bill: comfort, resilience and avoided future cooling capacity all belong in the business case too.
Using live data can mean smarter, faster, validated savings.
None of this is worth doing on a hunch, and it's certainly not worth approaching building by building with an in-person survey. The traditional route is slow, expensive, and often out of date before the report lands. Live, comparable data replaces all of that: one evidence base, continuously refreshed, covering every building on the same terms. And this is where Predict comes in.
Find out more about Predict
Grants can accelerate this, and your finance director will love it.
It also means you're ready the moment funding is. Resilience grants, retrofit funding and adaptation schemes are becoming more common as the climate case builds, and they tend to move fast, rewarding whoever can show up with the evidence already assembled.
Want to know which schemes are open right now?
We've mapped the current UK funding routes for cooling and overheating measures, and why live data is often the only way to move fast enough to catch them, in a companion article.
Read: The Funding Routes Worth Knowing, and Why Speed Wins here
The estates that get ahead of this aren't the ones spending the most. They're the ones who know, building by building, exactly where the risk sits: which roof, which wing, which lecture theatre or branch is closest to failing, and what it would actually cost to fix. That's a live-data question, not a guesswork one. When every building in your estate is measured on the same terms, you can finally answer the question that matters: which building, which intervention, gets the next pound.
Your first step doesn't need to be expensive. It needs to be clear.
OptimiseAI's Rapid Estate Review gives you a fast, evidence-based snapshot of overheating risk and cooling readiness across your entire portfolio, at a fraction of the cost of a traditional survey. Pair it with our Costing Plan and you'll walk away with a prioritised, fundable action plan: not an ambition to “adapt,” but a clear, costed order of operations.
British summers have changed. Your estate strategy can too, and it can start with a single, cost-effective cooling action plan.
References
Office (2026), “2025 is a double-record breaker: UK's warmest and sunniest year on record”, metoffice.gov.uk
Met Office (2026), “Summer 2026 so far: A look at the season at the halfway point”, metoffice.gov.uk/blog
Met Office (2025), “Summer 2025 is the warmest on record for the UK”, metoffice.gov.uk
BBC News, “How the UK's extreme heat is shifting the conversation about air-con”, bbc.co.uk (July 2026)
University of Birmingham heatwave modelling, cited in BBC News (as above)
CIBSE TM52, “The limits of thermal comfort: avoiding overheating in buildings”, cibse.org
OptimiseAI internal scenario analysis, August 2026: cost and payback figures are indicative UK 2026 planning allowances
Back to Blog
Interested to find out more?
Explore for yourself how to optimise retrofit solutions for cooling by ROI, solution or budget.
TRY THE INTERACTIVE DEMO
Copyright ©
2026
optimise-ai.com
Back to Blog
Our Ten Cooling and Overheating Fixes for Building and Estate Managers
For decades, British buildings were designed to solve one problem: keep the cold out. Thick walls, small windows, low ceilings, buildings huddled together for warmth. It worked brilliantly, for a climate that no longer exists.
2025 was the UK's warmest and sunniest year since records began in 1884, with a mean temperature of 10.09°C. 2026 didn't pause to let that record settle. By 15 July, this year had already beaten 1976's entire tally of days above 30°C, and become the first year on record to hit 35°C in May, June and July alike. Met Office scientists have said a summer as hot as 2025 is now roughly 70 times more likely than it would be without human-caused emissions. This isn't a blip. It's the new operating environment for every estate director in the country.
Later in this piece, we rank the ten highest-return measures available today, several of which need next to no capital outlay. But first, here's why the problem has arrived faster than most estates are ready for.
The city makes it worse.
Concrete, glass and tarmac soak up heat all day and release it slowly through the night: the urban heat island effect. Research from the University of Birmingham modelling a West Midlands heatwave found this effect alone accounted for roughly half of the 130 heat-related deaths recorded. Night-time temperatures in dense urban centres can run up to 7°C hotter than the surrounding countryside, precisely when buildings and the people in them most need to cool down and can't.
And most non-domestic buildings simply aren't built to cope.
Britain's default cooling strategy has predominantly been passive: shade, cross-ventilation and thermal mass. It's cheap, it's sustainable, and where a building was designed with those in mind, it still works well for most of the year. The trouble is that most of our buildings simply weren't designed or built to meet today's passive cooling demands. CIBSE's TM52 methodology, the industry standard for assessing overheating risk in offices, schools, hospitals and universities, points to a blunt conclusion: as the climate warms, the risk of buildings failing to stay comfortable through summer is set to double by 2050. That means a lot of retrofit work is needed, and at pace: official recommendations put air conditioning in hospitals and care homes within a decade, and schools within 25 years. That's a lot of hot classrooms and wards between now and then, and any fix needs to weigh its capital and operational cost against the energy bills and carbon it could otherwise drive up.
Then there's the period estate.
Universities, banks and public institutions are often custodians of genuinely beautiful, genuinely historic buildings: solid brick and stone structures that quietly absorbed heat for a century of milder summers. Many of these buildings are also uninsulated so whilst it helps with overheating in summer it creates significant heating requirement in the winter. Listed status, conservation constraints and the sheer cost of adapting heritage fabric make these buildings some of the hardest, and most urgent, to fix.
There's no single fix, and that's good news.
The most effective first moves are usually the cheapest ones. External shading and solar control film stop the sun's heat getting in at all. Reflective roof coatings cool down the top-floor and single-storey spaces that tend to fail first. Night purge ventilation, opening the building up overnight to flush out the day's heat, works brilliantly, especially paired with exposed thermal mass rather than fighting against it. Behind the scenes, a BMS re-commission, correcting the drifted sensors and simultaneous heating-and-cooling that quietly plague most estates, is very often the single highest-value measure available, and it costs next to nothing.
How our ten highest-return measures stack up
Here's how the ten highest-return measures stack up, based on typical 2026 UK installed costs:
Rank | Measure | Typical installed cost | Energy-only payback | Why it matters |
1 | Seasonal commissioning & retro-commissioning | £2–£8/m² (roughly £3,000–£20,000 per site) | Often under 1–3 years | Corrects the scheduling faults, failed sensors and simultaneous heating-and-cooling that cause most overheating, for next to no capital. |
2 | Reversible ceiling & circulation fans | £250–£800 per fan (roughly £5–£20/m²) | Often under 1–3 years vs local AC | Air movement raises the comfortable temperature by 2–3°C. High comfort return per pound, and often removes the need for mechanical cooling altogether. |
3 | Free cooling & air-side economiser | £5–£20/m² of serviced area | Roughly 1–4 years | Uses cool outside air before any mechanical plant switches on. A large reduction for low capital wherever an air handling unit is already in place. |
4 | BMS upgrade & re-commissioning | £15–£60/m² (re-commissioning alone: £2–£8/m²) | Roughly 1–5 years | Fixes the commonest causes of overheating: drifted sensors, failed dampers, heating and cooling fighting each other. Usually the single highest-value measure available. |
5 | Night purge ventilation | Controls £2–£10/m²; secure openings/fans £20–£80/m² | 1–5 years (controls only); 5–12 years with new openings | Flushes the day's heat out overnight so the building starts each morning cool. Most effective paired with exposed thermal mass. |
6 | Reflective roof coating | £15–£40/m² of roof | Roughly 3–8 years where cooling-led | Keeps roof surface temperature down. One of the best-value fixes for the top-floor and single-storey spaces that overheat first. |
7 | Solar control glazing film | £45–£100/m² of glazing | Roughly 4–10 years if air-conditioned | Cuts solar gain through the glass with minimal disruption. The answer for facades where external shading won't get planning consent. |
8 | Automated solar-responsive shading control | £100–£300 per opening (controls); £300–£1,000 motorised | Roughly 5–15 years, energy-only | Manual blinds are usually left in the wrong position. Automation captures most of the shading benefit that's otherwise lost. |
9 | Hybrid ventilation system | £60–£180/m² of serviced area | Roughly 5–15 years; can avoid full AC | Mixed-mode operation is a recognised overheating strategy that avoids committing the asset to full mechanical cooling. |
10 | External shading to reduce solar gain | £250–£700/m² of shaded glazing | 8–20 years energy-only; 3–10 years including avoided cooling | Stops solar gain before it enters the building at all. Usually the most effective passive measure available, where access and planning allow. |
Costs and paybacks are indicative planning allowances, excluding VAT: confirm suitability and pricing against the building's measured energy profile and a competitive quotation before committing.
Only once those routes are exhausted does it make sense to reach for mechanical cooling: a VRF system for a stubborn hotspot, or a reversible air-to-air heat pump that cools in summer and heats in winter. Both are effective, and both will push up your energy consumption. Pairing the units with on-site solar and battery storage can offset that, delivering free, low-carbon electricity to run them. The trade-off is capital cost: on energy savings alone, the payback often runs longer than a finance director would like. Which is exactly why the case for these measures needs to rest on more than the energy bill: comfort, resilience and avoided future cooling capacity all belong in the business case too.
Using live data can mean smarter, faster, validated savings.
None of this is worth doing on a hunch, and it's certainly not worth approaching building by building with an in-person survey. The traditional route is slow, expensive, and often out of date before the report lands. Live, comparable data replaces all of that: one evidence base, continuously refreshed, covering every building on the same terms. And this is where Predict comes in.
Find out more about Predict
Grants can accelerate this, and your finance director will love it.
It also means you're ready the moment funding is. Resilience grants, retrofit funding and adaptation schemes are becoming more common as the climate case builds, and they tend to move fast, rewarding whoever can show up with the evidence already assembled.
Want to know which schemes are open right now?
We've mapped the current UK funding routes for cooling and overheating measures, and why live data is often the only way to move fast enough to catch them, in a companion article.
Read: The Funding Routes Worth Knowing, and Why Speed Wins here
The estates that get ahead of this aren't the ones spending the most. They're the ones who know, building by building, exactly where the risk sits: which roof, which wing, which lecture theatre or branch is closest to failing, and what it would actually cost to fix. That's a live-data question, not a guesswork one. When every building in your estate is measured on the same terms, you can finally answer the question that matters: which building, which intervention, gets the next pound.
Your first step doesn't need to be expensive. It needs to be clear.
OptimiseAI's Rapid Estate Review gives you a fast, evidence-based snapshot of overheating risk and cooling readiness across your entire portfolio, at a fraction of the cost of a traditional survey. Pair it with our Costing Plan and you'll walk away with a prioritised, fundable action plan: not an ambition to “adapt,” but a clear, costed order of operations.
British summers have changed. Your estate strategy can too, and it can start with a single, cost-effective cooling action plan.
References
Office (2026), “2025 is a double-record breaker: UK's warmest and sunniest year on record”, metoffice.gov.uk
Met Office (2026), “Summer 2026 so far: A look at the season at the halfway point”, metoffice.gov.uk/blog
Met Office (2025), “Summer 2025 is the warmest on record for the UK”, metoffice.gov.uk
BBC News, “How the UK's extreme heat is shifting the conversation about air-con”, bbc.co.uk (July 2026)
University of Birmingham heatwave modelling, cited in BBC News (as above)
CIBSE TM52, “The limits of thermal comfort: avoiding overheating in buildings”, cibse.org
OptimiseAI internal scenario analysis, August 2026: cost and payback figures are indicative UK 2026 planning allowances
Back to Blog
Interested to find out more?
Explore for yourself how to optimise retrofit solutions for cooling by ROI, solution or budget.
TRY THE INTERACTIVE DEMO
Copyright ©
2026
optimise-ai.com