Engineering notesfrom the field
Practical, opinionated writing on heat pumps, MVHR, low-carbon heating and the craft of mechanical building systems — written by the engineers who install them.
FeaturedSizing an air source heat pump for the real building, not the rule of thumb
Why oversizing kills seasonal performance — and how we model against actual heat loss instead of floor area.
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MVHR in airtight retrofits: where most installs go wrong
Balanced airflow, acoustic design and filter strategy — the details that separate a healthy home from a noisy one.
Ground source vs air source: an honest comparison for UK homes
Capital cost, running cost, lifespan and grant eligibility — laid out without the sales bias.
Low-temperature heating: why distribution matters more than the source
The heat pump is only half the story. How underfloor and oversized emitters unlock real efficiency.
Commissioning reports: what good documentation actually looks like
What you should receive at handover — and why it matters for warranty, service and future upgrades.
Retrofitting air conditioning without wrecking a period home
Discreet splits, acoustic placement and listed-building considerations for sympathetic cooling.
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