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Exposure guide

How close to the water are you?

Distance from the surf is the single biggest thing deciding how hard the coast is on your outdoor equipment. Move the slider to where you actually live or trade, and this says what that means in practice.

What that means

Exposure
Right on the water

At this distance the outdoor unit can take airborne salt directly whenever the wind comes off the sea, and in heavy surf it can take spray. This is the most demanding position there is for a condenser in this county, and equipment here needs treating as a maintained item rather than an installed one.

  • Rinse the coil with fresh water often — monthly is not excessive in this band.
  • Have the windward face inspected and graded at every service visit, not annually.
  • Before you buy anything, ask specifically about coil coatings and cabinet construction, and about how high the unit will be mounted.
  • Read the coastal wording in the warranty. A good many manufacturers put distance-from-salt-water terms in theirs, and the time to find that out is before you sign.
Close in

This covers most of the eastern side of Pompano Beach and the barrier-island communities behind it. Salt aerosol reaches you routinely on the prevailing easterly, even though you will rarely see spray. Corrosion here is steady rather than dramatic, which is exactly why it gets missed until a coil is well gone.

  • Rinse the coil with fresh water quarterly, and after any storm that comes in off the sea.
  • Ask for the windward face to be inspected and graded at every service, and for that grading to be written down so it can be compared.
  • Watch the electrical side as much as the coil — contactors and terminals corrode here too, and that is what actually stops a compressor.
  • Worth asking about coated coils when the time comes to replace.
A few miles back

Salt still reaches you — the aerosol travels a long way inland on an onshore wind — but in far smaller quantities than on the beach. Corrosion is a real factor over the life of a system rather than the thing that decides it, and ordinary good maintenance handles it.

  • Rinse the coil with fresh water once or twice a year, and after a storm that has blown in off the sea.
  • Normal service intervals are reasonable; ask for coil condition to be noted so a trend exists.
  • Spend the attention on the things that matter more at this distance: airflow, duct leakage into the attic, and the condensate drain.
Well inland

At this distance corrosion is no longer the leading question about your equipment. Humidity, duct leakage, drain lines and correct sizing all matter more here, and that is where the money is better spent.

  • A fresh-water rinse now and again does no harm and keeps the coil clear of dust and grass clippings, which matter more than salt out here.
  • Concentrate on the condensate drain and the overflow switch. Inland or not, this climate makes a great deal of water.
  • Get the sizing right at replacement. An oversized system feels clammy everywhere in Broward County, not just near the sea.

You already rinse it. That puts you ahead of most of the equipment we see, and it is worth keeping up. Power the unit off at the disconnect first, use a garden hose rather than a pressure washer, and work from the inside of the coil outwards where you can get at it. Rinsing slows what is coming; it does not reverse damage already done, so it is still worth having the fins looked at properly.

Nothing is rinsing it. Of everything on this page this is the cheapest thing to change and it is the one most owners are never told about. Power the unit off at the disconnect, use a garden hose rather than a pressure washer, and work from the inside of the coil outwards where you can reach. It will not undo damage already there, but it slows what happens next — and it costs nothing.

Distance is a proxy, not a measurement. What your unit faces, what stands between it and the surf, how high it is mounted, which way the wind usually blows and what the equipment is built from all change the answer. This ranks exposure so you know what to ask about; it does not inspect your equipment, it cannot tell you how many years you have left, and it deliberately produces no price.

How does salt actually damage a coil?

Two different metals, salt water between them, and a small electrical cell that eats the softer one.

A condenser coil is copper tubing with thin aluminium fins pressed onto it. Copper and aluminium sitting in contact with a salt solution form a galvanic cell, and in that pairing the aluminium is the metal that corrodes. That is why the fins go first and the tubes generally do not.

The visible sequence is consistent: the fins dull, then whiten, then turn powdery, and finally lose contact with the tube they were pressed onto. Once a fin is no longer touching the tube it is no longer transferring heat from it, and cleaning cannot restore that.

Along the way the same salt is working on cabinet screws, panel edges and electrical terminals. In practice a corroded contactor or a seized fastener causes a service call long before the coil itself gives up.

Do coil coatings work?

They slow it down. They do not make a unit immune, and they are not a substitute for rinsing it.

Factory-applied coatings put a barrier between the metal and the salt, and near the water that is worth having. They add cost, they can be specified on most equipment when it is ordered, and they are much easier to get right at the order stage than afterwards.

What we will not do is quote you a figure for how many extra years one buys. That depends on your exposure, the coating, the installation and whether anybody ever rinses it, and any single number would be invented.

The other half of the decision is mounting: getting the unit up off the ground, out of sprinkler spray and away from standing salt water does a great deal, and it is usually cheaper than the coating.

Should I be worried about my warranty?

You should read it. Coastal-proximity wording is common in this industry and people generally discover it at the worst moment.

A number of manufacturers include terms in their warranties relating to installation near salt water — sometimes a distance, sometimes a requirement to maintain or rinse the equipment, sometimes an exclusion for corrosion damage. The terms vary by manufacturer and by model and they change over time, so we are not going to summarise anyone’s here.

What we will do is tell you to ask for the warranty document before you buy, read the section on corrosion and coastal installation, and keep your maintenance records. Those records are frequently what a claim turns on.

If you want us to go through the document with you before you order, we will. It is a much better use of an hour than the conversation that happens afterwards.