Condensing Unit Too Close to House | HVAC Basics

Condensing Unit Too Close to HouseCondensing Unit Too Close to House - This condensing unit was too close to the house to effectively reject heat. It was a bad HVAC condensing unit installation job by the HVAC installers. A mechanical inspector rejected the final permit until the condensing unit was correctly installed.

It is recommended that condensing units have at least 2 feet of space so that they can effectively reject heat. It needs space to breathe and pull air into the coils so that there is a proper heat exchange taking place when it is running. On this air conditioner condensing unit there are four sides to the unit.

By installing the air conditioner condenser too close to the house the installer effectively reduced the capacity of this unit by nearly one-fourth which will cause problems with the unit in the way of higher head pressures and that will cost the homeowner more money in the long run.

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HVAC Green Technology | Heating and Cooling

HVAC Green Technology | Heating and CoolingHVAC Green Technology | Heating and Cooling - First of all, we need to define Green Technology before we compare it to HVAC and discuss how the HVAC industry is working to make the equipment and designs used in Green Technology, friendly to the environment. Green Technology uses evolving technology in utilizing methods and materials to develop techniques that are more friendly to the environment than previous methods and materials. (more…)

Helping Your Air Conditioner – Beating the Heat

Helping Your Air Conditioner - Beating the Heat - The new house you just bought is not so cool and the air conditioner seems to run all the time. You begin to worry that maybe something is wrong with the air conditioner. You tolerate it for a while until your spouse broaches the subject a few hours later. Both of you discuss the matter and come to the conclusion that something is wrong with the air conditioner. (more…)

Efficiency Factors for Condensing Units | HVAC Refrigeration

Efficiency Factors for Condensing Units - Condensing Units 2Efficiency Factors for Condensing Units - For years compressors inside the condensing unit were sized to meet the highest load demand for whatever application they were serving. Even today, many compressors, located inside the condensing unit are sized in accordance with their highest load demand even though it is unlikely they will only be needed to run for full load conditions approximately 30-35% of the time.

While many systems have worked just fine this way for many years they have not been very energy efficient. So even on a mild day, these compressors run full blast even though the system may only require the compressor to run at 50% capacity to satisfy the demand. That creates problems with short cycling which causes premature wear, higher maintenance costs, and reduces total compressor lifespan. (more…)

Dual Two-Stage Split System with a Dual Slab Coil

Dual Two-Stage Split System with a Dual Slab Coil. Huh?

Dual Two-Stage Split System with a Dual Slab Coil
Richard - Very nice site!- Dual Two-Stage Split System with a Dual Slab Coil - I have a question; my home was fitted out by the previous owner with a twinned system, and a thermostat (Totaline P374-1900) which was not designed to control discreet, paired units. I confirmed this with Totaline. The result is only one unit runs, and the second unit is never activated. It functions, but not automatically.

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