HVAC design, explained.
Plain-English guides to office ventilation and air-conditioning, and to explaining a scheme to the people who have to approve it.
Cat A vs Cat B fit-out: what changes in the HVAC
The difference between a Cat A and a Cat B office fit-out, explained for the HVAC: what the landlord's installation includes, what a Cat B changes in the ceiling, Cat A+, who pays, and the questions to ask early.
How much fresh air does an office need per person?
Office ventilation rates explained: the 10 l/s per person minimum in Approved Document F, the higher targets designers use, how occupancy density changes the sum, and what CO₂ readings tell you.
Age of air, explained without the maths
What the age of air means, how it differs from air changes per hour, how it is measured and modelled, and why two rooms with the same fresh-air rate can perform completely differently.
How to present an HVAC scheme to clients who don't read M&E drawings
Why good HVAC designs get questioned, delayed or value-engineered out, and a practical, stage-by-stage method for presenting a mechanical scheme to landlords, agents and occupiers who don't read M&E drawings.