Some buildings weren’t designed as homes at all, or were designed for a different century’s idea of comfort. Bringing a barn, a church conversion, or a substantial period property up to modern performance is a genuinely different design problem to a straightforward retrofit: bigger volumes to heat, unusual fabric, and often real constraints on what can change. We design whole-house systems for exactly this kind of project.
Ground source specialists
Since 2009
Substantial and period property
Specialists
Accreditation
MCS | RECC | GSHPA
We specify
Maxa & Ecoforest
A barn conversion, a converted church, or a period mansion being brought back into full use shares a problem a standard retrofit doesn’t have: there’s often no existing domestic heating system to design around, because there was never a conventional one to begin with, or what’s there was designed for a completely different building use. That sounds like it should make things simpler. In practice it means every part of the system, the heat source, the emitters, the ventilation, has to be designed from a genuine blank slate, against a building envelope that’s frequently large, thermally complex, and constrained by what planning or listed status will actually allow.
This is where a heat-loss calculation done properly stops being a nice-to-have and becomes the entire project. Get the numbers wrong on a building this size, and the shortfall isn’t a slightly cool room, it’s a heating system that was never going to work from day one.
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A converted barn or a mansion-scale property often means large, unevenly insulated volumes, mixed original and modern construction, and rooms with very different heating demands under one roof.
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Listed status, conservation area rules, or a conversion’s planning consent can all restrict external changes, visible pipework, or where equipment can sit. We design around those constraints from the outset.
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At this scale, an emitter system that isn’t correctly sized against the actual fabric will either fail to heat the building properly or force the heat pump to run inefficiently for its entire life.
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No external unit to site awkwardly against a period elevation, quieter, and a stable ground temperature that helps compensate for what an older or larger building’s fabric can’t do alone.
Depending on the property, its planning status, and what the site allows, a project like this can include any combination of the following.
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Sized against a heat loss calculation for the building’s actual volume and construction, not a domestic rule of thumb.
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Underfloor heating where floors allow it, correctly sized radiators, or a considered mix across very different room types.
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Specified within whatever planning or heritage constraints apply to the property.
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Genuinely valuable here, since different parts of a large or converted building rarely perform the same way.
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Appropriate to the building’s original construction, particularly where it needs to remain breathable.
Usually, yes, and often more suitable than a standard retrofit once the design work is done properly, since there’s no existing system fighting the new one. The real question is whether the building’s fabric and emitter design can deliver comfort at the flow temperature the heat pump runs efficiently at, which is exactly what the survey establishes.
Boiler Upgrade Scheme grant — towards an air or ground source heat pump, plus 0% VAT on qualifying work.
From a site visit, not a postcode. Roof orientation, shading, structural condition, and how much electricity the household actually uses through the day all factor in, then the array and battery get sized against that. A 1kWp array typically needs around 8m² of roof, but the number that matters is the one built from your usage, not a rule of thumb.
Not usually, though it can restrict what’s visible externally and where equipment sits. Ground source often works well here precisely because there’s no obvious outdoor unit to place against a period elevation. We work through what’s realistic within the property’s status during the survey.
The volumes are often larger and less uniform, sometimes a single large open space, sometimes several rooms with very different original uses and fabric. A domestic rule of thumb doesn’t hold up at this scale. We calculate heat loss against the building’s actual construction and layout.
Not necessarily, though earlier is always better, particularly if underfloor heating or ground array positioning is still undecided. Tell us what stage the project’s at and we’ll be honest about what’s still achievable.
Yes, where appropriate. Larger or converted buildings often need a proper ventilation strategy alongside the heating system, particularly where the original construction needs to remain breathable rather than sealed tight.
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A barn, a church, a mansion mid-conversion, or something that doesn’t fit neatly into any category, all worth a proper conversation before anything’s assumed about what’s possible.
Prefer to talk it through first? Call 01271 850040.
