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Plain-English answers on air, water and power for Southwest Florida homeowners — organised the way you actually shop: learn the basics, weigh your options, then take the next step. Over 60 years of house calls behind every page.

Glossary · the words on your estimate

Speak the trade.

If a technician uses a term you do not know, stop them and ask. These are the ones that come up most across the three trades.

SEER2 Air
The current US seasonal cooling-efficiency rating. Higher SEER2 means less electricity for the same cooling. It replaced plain SEER in 2023.
Tonnage Air
An air conditioner's cooling capacity. One ton equals 12,000 BTU per hour. Bigger is not better — an oversized unit short-cycles and leaves the house humid.
Manual J Air
The industry load calculation that sizes equipment to your specific house, rather than matching whatever was there before.
Air handler Air
The indoor half of a split system — blower, coil and usually the heat strips. Normally in a closet, the garage or the attic.
Condensate line Air
The drain that carries water off the indoor coil. Block it and a float switch shuts the system down, which is why 'no cooling' is often really 'clogged drain'.
MERV Air
An air-filter rating. Higher MERV catches smaller particles, but too high for the blower starves airflow — the rating has to suit the system.
Dehumidistat Air
A humidity-triggered control. In a part-time residence it runs the system on humidity rather than temperature, so the house is not sealed up damp all summer.
GFCI Power
Ground Fault Circuit Interrupter. Cuts power when current leaks to ground. Required near water — kitchens, baths, outdoors, pool equipment.
AFCI Power
Arc Fault Circuit Interrupter. Trips on the arcing that starts wiring fires, which an ordinary breaker will not notice.
Load centre Power
The breaker panel. Its amperage rating caps what the whole house can draw at once, which is what an upgrade is really buying you.
Transfer switch Power
The device that hands your house from the grid to the generator and back. An automatic one does it without you being home.
Backflow preventer Water
A valve stopping irrigation or pool water siphoning back into the drinking supply. Florida requires periodic testing by a certified tester.
Polybutylene Water
Grey plastic supply pipe used widely in Florida homes built roughly 1978–1995. It becomes brittle and fails from the inside, usually without warning.
Grains per gallon Water
How water hardness is measured. It sets the size of a softener and how often it regenerates.
Hydro-jetting Water
Clearing a drain with high-pressure water instead of a cable. It scours the pipe wall rather than punching a hole through the blockage.
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