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Frequently Asked Questions
How does radiant heating differ from warm air?
It warms surfaces, not the air.
Infrared travels until it strikes something solid.
People, floors and machinery absorb it.
Those surfaces then release heat slowly.
Air temperature may barely change.
Comfort comes from the surfaces, not the air.
Why does it suit draughty buildings?
Heated air leaves before it does any good.
Large doors and high roofs make that worse.
Radiant energy reaches people regardless.
It does not depend on holding air in place.
Loading bays and hangars are typical.
Outdoor and open structures too.
Can it heat part of a space?
Yes, and that is a categorical saving.
A workstation can be warmed without the building.
Warm air systems cannot do this.
Zones are defined by where emitters are aimed.
Large unheated buildings benefit most.
It changes what is economic to heat.
What is the actual specification?
Mounting height and angle, before output.
Radiant energy falls off with distance.
Coverage is where the emitter is aimed.
Too low scorches, too high does nothing.
Manufacturers publish patterns and minimum heights.
Treat both as requirements.
What clearances are required?
Those specified to combustible material.
Stacked stock is the recurring problem.
It may be stacked higher later than at survey.
Mark maximum stacking heights on the floor.
Clearance applies above and to the sides.
This is a genuine safety constraint.
Does it move dust around?
No, and that is a real advantage.
There is no fan and no air movement.
Settled dust stays settled.
Paint and finishing processes benefit.
So do food and clean operations.
Warm air systems disturb all of it.
How is it controlled?
By zone, on occupancy where possible.
Response is fast because surfaces heat directly.
That suits intermittent occupation.
Timeclock control wastes much of the benefit.
Black bulb sensing measures radiant effect.
An ordinary air thermostat misreads the space.