Shops, suites and small industrial

A sheet per unit, with numbers on it, that you keep. The test of a maintenance record is whether a different contractor could pick the site up from it, and ours are written to pass that test.

• Filters changed, sizes recorded on the unit as well as on the sheet
• Coils inspected both faces, condition graded, pressure drop noted
• Belts, sheaves and bearings set, part numbers listed, worn sheaves flagged
• Contactors, capacitors and terminals checked for pitting
• Combustion tested with instruments before the heating season
• Economiser travel driven, minimum outside-air position recorded as a number
• Condensate drains, traps and overflow switches cleared and function-tested
• Control schedule documented as actually programmed

Yes, and it gets agreed at the survey rather than negotiated on the night. Which hours you can actually give us is the first thing we establish, because it decides how the work is broken up and what it costs.

We could, and it would probably not fix it. A hood pulling harder than its make-up air can supply puts the building under negative pressure, so the front of house draws outside air through every gap it has and the cooling spends the evening losing that argument.

We measure extract against make-up air first. Where the answer is make-up air rather than more cooling, that is what we will say — even though it is the less profitable sentence.

No. We will tell you honestly where you are in the queue and call back. A printed number of hours gets broken on the first properly cold night, which is precisely when you would be relying on it — and a promise that fails then is worse than no promise.