Air Conditioning Systems

They are designed to cool the air in a home using a refrigerant such as Freon to transfer heat from indoors to outdoors. This refrigerant circulates through a closed-circuit loop of copper tubing that runs between an outdoor coil - called a condenser, and an indoor coil - called an evaporator.

The refrigerant raises and drops in temperature as it absorbs and gives off heat and it changes from liquid to gas and back to liquid as its temperature and pressure change. When cold refrigerant circulates through the indoor coil, it absorbs heat from room air that is blown across the evaporator. This heat, carried by the refrigerant, is expelled outdoors through the condenser.

A Hybrid (split system) cools different zones of a house, each controlled separately.



A Forced-Air Heating System

A Forced-Air Heating System

This system is designed to have a blower in the furnace pull cool air in from rooms through ductwork. The air then passes through a metal "heat exchanger" where it's heated by the burner that's located inside a combustion chamber. Gas is mixed with air and then ignited by a pilot light, a spark or a similar device controlled by a thermostat. The system then blows the warm air back into rooms through the ductwork. Exhaust gasses from the burners are vented outside through a flue. With older "gravity" furnaces, the heated air is delivered by natural convection, not by a blower.

An Electric Forced-Air Furnace uses heating elements rather than burners to heat in the heat exchanger. Additional devices can be added to nearly all Forced-Air Systems to condition the air that passes through. An Air-Conditioning unit can cool and dehumidify the air, an Electronic Air Cleaner will remove dust and particulates from the air, and a Humidifier can add moisture to uncomfortably dry winter air.

Zoned Heating is a popular new concept in efficient energy usage. With a zoned system, you can independently control the air flow sent to various rooms or zones in your home - directing heating or cooling where you want it - at various times of the day - adjusting the amount of heating or cooling delivered throughout the house according to the need. To make this possible, a system needs a special multi-zone programmable thermostat and a few motorized dampers. For best results, the furnace's output should be variable.




Air Cleaners

Though dust is most noticeable where it settles and collects, the average house has about 3 million dust particles suspended in every cubic foot of air. For allergy sufferers, asthmatics, people with bronchial problems and those who are hyper-sensitive to airborne particulates, this can be a real problem. Air cleaners and filters are designed to remove dust from the air. Air cleaners are made as self-contained, tabletop or room-size appliances that serve small areas or single rooms, or they may be in the form of whole-house filters that attach onto a house's forced-air furnace. They work by mechanical filtration, electrical attraction or a combination of the two methods.

An electrostatic precipitating air cleaner draws particles in by a fan and charges them with a series of high-voltage wires. A precipitating cell (a series of plates) that carries the opposite electrical charge attracts the particles as they pass by. They come as portable versions or whole-house models that connect to the cold-air return plenum on the furnace. They are quite effective, removing about 95% of bulk dirt and 85% of microscopic particles.

Heat Recovery Ventilators Save Energy. The best way to keep a house from building up air pollution and humidity is to provide plenty of ventilation. But how can you ventilate a house without letting costly heated or cooled air out the window? You can install a heat-recovery ventilator.

AFUE is the standard measurement
of efficiency for a Gas Fired Furnace. Given in percentages, this number tells you how much of your fuel is used to heat your home and how much fuel is wasted. The higher the AFUE rating, the greater the efficiency. Furnaces are required today to have an AFUE rating of at least 78%. Cost Savings: If you have an older furnace (with an AFUE of approximately 60%), you could save up to 40% on your heating bills by replacing it with a new high efficiency furnace! The cost to replace your old, inefficient furnace is paid back through lower utility bills.

SEER (Seasonal Energy Efficiency Ratio)
In addition, U.S. regulatory agencies today require all new Air Conditioners and Heat Pump products to have a 13.0 SEER rating or better. SEER is the measure of efficiency by which the cooling process of Air Conditioners and Heat Pumps are rated. The higher the SEER number, the greater the efficiency and therefore greater energy savings.

During a Service Call Inspection of your Furnace, A+ Heating & Air will:

** Check the burner, safety controls, flue pipe & chimney base, blower & blower motor, draft inducer, pressure switch, thermostat, and ignition.

** Install new air filter

** Advise you on possible equipment or parts replacement to ensure overall safety, energy efficiency, or performance.

Call A+ HEATING & AIR
today so we can determine the proper system application for your home or office. We can also add a full Air Conditioning System for year-round comfort.
(425) 355-8437