Furnace Air Return in Forced Air Heating System

Furnace Air Return in Forced Air Systems

Poorly designed or older forced air heating, and air-conditioning systems often have only a single air return compartment.
With a single story home, such furnace air return installation is still popular, simply because it saves money and material.
However, single furnace air return configuration might not be as efficient as the one with individual air return ports installed in every room. You should also remember to have doors in all rooms undercut approximately 3/4″ above the finished floor surface to provide proper air circulation.
Sometimes, carpet installation over the hardwood floor completely eliminates this necessary gap […]

HVAC Air Filters Type and Locations | Forced Air Systems

HVAC Air Filters Type and Locations

We notoriously forget to replace air filters in our forced air heating / air conditioning systems… Air flow starts deteriorating through the house, system seams to be operating, but it takes significantly longer to achieve desired temperature …
The solution might be simple – clogged air filter, or missing air filter, and in that second case, you might have a contaminated evaporator coil (part of air conditioning system). Air filters, usually come in two groups: electronic/electric and passive (reusable, electrostatic or disposable).
Electronic/electric – reusable filters, click on link for detailed information and maintenance instructions (this one […]

Air Conditioning Icing

One of the problems with home forced air air conditioning systems is icing, which you my notice during its operation on: exterior condensing unit (inside the enclosure), refrigerate lines, or evaporator coil (AC section inside the house, usually not visible without removing of the access panel). Condition is usually associated with inadequate or lack of … Read more

Refrigerant Line Insulation | AC Lines Foam Installation

Refrigerant Line Insulation

Refrigerant line insulation is partially responsible for the efficiency of your air conditioning system operation. Two different diameter copper refrigerant lines, run between the air conditioning system condensing unit (house exterior), and the AC coil (named after its shape) installed inside the house (sometimes crawlspace or attic) / contained within its own compartment.
Suction refrigerant line
This is a thicker copper pipe, carries cool refrigerant gas and has a temperature of approximately 40°F (4.4°C) / requires insulation.
Liquid refrigerant line
Thinner copper pipe carries liquefied refrigerant, […]

AC Wall Units

Air conditioning wall units are typically installed inside the metal sleeves, permanently secured to the building wall structure. In most instances, they only require regular maintenance procedures like filter replacement, and cleaning, which should be performed on regular basis. Because wall units should discharge condensate (condensation that builds up on the coil, inside the air … Read more

AC Condenser Disconnect | AC Disconnect Grounding

AC Condenser Disconnect | AC Disconnect Grounding
Your house’s central cooling system ac condenser disconnect switch is a requirement and an important safety feature.
AC condenser disconnect must be located in sight and not directly behind the condenser so it’s easily accessible.
Depending on the manufacturer, enclosures have a disconnect handle located on the exterior or behind the small cover.
Accessing of some older air conditioning condenser disconnect switches with a hidden handle might be difficult, they are often corroded, have padlocks installed with missing keys which might prevent emergency disconnect when needed. Therefore, house AC disconnect enclosure should be periodically tested for proper operation, and maintained accessible […]