"Warren at Lighten Up came in on time and as scheduled. Loved working with him. He provided new lighting for our kitchen remodel and did a great job. He still needs to come back and hook everything up. Also Seth came in and did some plumbing work and repair that we did not even know needed repair. I highly recommend this company and look forward to working with them in the future"
When seeking emergency heating or cooling services you want experts that actually care about the results and your comfort. You want to choose the HVAC company in Alexandria with extensive skill and top-class tools, but you don’t want them to take advantage of your bad situation! With HVAC & Plumbing Unlimited, you never need to worry. We make it our mission to offer superior services any time you need it, and we guarantee cost-efficient solutions that restore your comfort.
At times, malfunctions strike without warning.  These problems rarely stick to regular business hours.  When your comfort, safety, and well-being is at stake, don’t wait for Monday morning.  The service team from Ferran Services is available 24/7 to provide the prompt and dependable assistance you require.  Fully-stocked service trucks and extensively trained technicians allow us to handle the majority of repair requirements in a single visit.  We work on all makes and models, and our technicians do not rely on commission.  We never take advantage of your desperate situation, never sell you a product or service you don’t need, and always keep you informed.  By relying on Factory Authorized Parts, we restore system efficiency, sound levels, and longevity.
If the condenser coils are clogged, the compressor can overheat and shut down. You’ll experience intermittent periods of minimal cooling, followed by no cooling. Even if you’re “sure” the condenser coils are clean, clean them again. Turn off the power. Flip the air conditioning service and furnace circuit breakers in your main electrical panel to the “Off” position. Next, turn off the power switch right at the furnace or air handler. Then yank the disconnect block (Photo 1) and clean the condenser coils (Photo 2). If the air conditioning service still doesn’t work properly after you’ve cleaned the condenser coils, installed a new filter and opened all the supply vents, proceed with the following repairs.
The compressor-based refrigerant systems are air-cooled, meaning they use air to exchange heat, in the same way as a car radiator or typical household air conditioner does. Such a system dehumidifies the air as it cools it. It collects water condensed from the cooled air and produces hot air which must be vented outside the cooled area; doing so transfers heat from the air in the cooled area to the outside air.

Allow our experts to help with any of your heating and cooling needs or questions. Our wide array of expertise and background will benefit you and your home, whether you are considering a replacement system or evaluating your whole system to check for areas of improvement. We can help you reach your optimum indoor comfort. Give us a ring at 866-397-3787 or request an appointment online.
If your furnace is more than 15 years old or broken beyond repair, furnace replacement is necessary. Old furnaces are very inefficient which means that you could be spending more on your gas or electric bill than you need to. Old furnaces can also be very hazardous to your health and home. Furnaces are basically controlled fires, and when the control systems on your furnace are out of date or malfunctioning, the safety of your home is in jeopardy. If you have an old or malfunctioning furnace, or if you want a safety check on your current system, then give our furnace replacement company a call today!

If your home is not heated using forced air, chances are a boiler will make sure you stay warm during cold nights. A hot water system delivers hot water through a network of pipes that run to every room in your house. The heating effect gets maximized through radiators. The most common issues with hot water heating tend to be not be major, but small problems that add up over time. Mineral deposits within the water tank, a pilot light malfunction, or an issue with a radiator itself can require professional repair. On average, you will pay between $183 and $582 for these problems. The exact amount will depend on the exact problem, as described in our boiler repair cost guide.


An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For example, six air changes per hour means an amount of new air, equal to the volume of the space, is added every ten minutes. For human comfort, a minimum of four air changes per hour is typical, though warehouses might have only two. Too high of an air change rate may be uncomfortable, akin to a wind tunnel which have thousands of changes per hour. The highest air change rates are for crowded spaces, bars, night clubs, commercial kitchens at around 30 to 50 air changes per hour.[17]
The basic concept behind air conditioning is said to have been applied in ancient Egypt, where reeds were hung in windows and were moistened with trickling water. The evaporation of water cooled the air blowing through the window. This process also made the air more humid, which can be beneficial in a dry desert climate. In ancient Rome, water from aqueducts was circulated through the walls of certain houses to cool them. Other techniques in medieval Persia involved the use of cisterns and wind towers to cool buildings during the hot season.[5]
7) Schedule an annual tune-up with an HVAC professional. A trained HVAC technician can detect most problems before they become major ones. With a cost of around $100 for a routine maintenance call, the benefits will likely outweigh the costs by a considerable margin. A typical tune-up will include various tests to ensure your unit’s internal parts are functioning correctly, as well as a filter check, and a refrigerant charge if needed. Your technician will likely also clear the drain, and clean your unit thoroughly inside and out.

If your furnace is more than 15 years old or broken beyond repair, furnace replacement is necessary. Old furnaces are very inefficient which means that you could be spending more on your gas or electric bill than you need to. Old furnaces can also be very hazardous to your health and home. Furnaces are basically controlled fires, and when the control systems on your furnace are out of date or malfunctioning, the safety of your home is in jeopardy. If you have an old or malfunctioning furnace, or if you want a safety check on your current system, then give our furnace replacement company a call today!
We take great pride in our crew, choosing the best and brightest to represent R.S. Andrews in the face of an emergency. Our HVAC contractors boast not only unparalleled skill but also a friendly and professional demeanor. All of our work comes completely guaranteed, and we won’t rest until your emergency has been resolved to your full satisfaction!
An important component of natural ventilation is air change rate or air changes per hour: the hourly rate of ventilation divided by the volume of the space. For example, six air changes per hour means an amount of new air, equal to the volume of the space, is added every ten minutes. For human comfort, a minimum of four air changes per hour is typical, though warehouses might have only two. Too high of an air change rate may be uncomfortable, akin to a wind tunnel which have thousands of changes per hour. The highest air change rates are for crowded spaces, bars, night clubs, commercial kitchens at around 30 to 50 air changes per hour.[17]

Air flow meter Aquastat BACnet Blower door Building automation Carbon dioxide sensor Clean Air Delivery Rate (CADR) Gas sensor Home energy monitor Humidistat HVAC control system Intelligent buildings LonWorks Minimum efficiency reporting value (MERV) OpenTherm Programmable communicating thermostat Programmable thermostat Psychrometrics Room temperature Smart thermostat Thermostat Thermostatic radiator valve

×