Which to Go for – Mini-splits, Multisplits or VRF?

Air conditioning Ramona - mini split, multisplit or vrf Energy efficiency is the in thing in this day and age, not only for the love of our planet, but also for the love of our hard-earned money. In San Diego, we are blessed with mild and sunny weather, but it can get hot. What solution should you go to for your air conditioning Ramona (or San Diego) while promoting environmental sustainability and pursuing lower utility bills?

Ductless mini-splits

Mini splits are made of an indoor and outdoor unit connected with some wiring and tubing. They are quite easy to install and make a perfect solution when there is no room for ductwork. They are also quite energy-efficient (of course, if designed and installed properly). The main advantage over ducted centralized systems is that there are no ducts, which minimizes the loss of energy through air leaks and heat exchange. If every room has a unit of its own, the temperature can be individually controlled and the ACs are only used when you need them. There is, however, an option with some models to turn them on remotely or on a preprogrammed schedule (before you come home or before you get up).

Ductless multisplits

These systems are very similar to the previously explained, with the difference that one outdoor units is connected to a number of indoor units, between 2 and 8 typically. The advantage is that less space is needed for the outdoor unit, when compared to having multiple mini-splits. There are also some savings in the energy bills – it’s more energy-efficient to have one outdoor unit supplying multiple indoor units than having an outdoor unit per each indoor air blower.


VRF or Variable Refrigerant Flow takes air con to wholly new heights. It’s an extremely sophisticated technology that basically operates on the same principle like the multisplit system. The crucial difference is that one outdoor unit can support as many as 48 indoor units. Also, unlike multisplits, it’s possible to heat one room and cool another with VRF technology.

Application is the key

Mini-splits are very cost-effective and quite energy-efficient when smaller applications are concerned. With a multisplit, you have to bear in mind that the failure of the outdoor unit will disable all the indoor units. On the other hand, having a multisplit could be better for your wallet, but only if it’s got inverter technology and the tubing is not too long (so as to avoid energy losses due to refrigerant flow).

VRF is a state-of-art system, but it could be that its sophistication is best harnessed in commercial spaces and multi-family housing. The installation costs can be more than twice the cost of other systems, plus the system itself is more expensive. In addition, VRF systems need a dedicated outdoor air system that confirms to certain ventilation codes, and they are also suited for buildings with operable windows and natural ventilation.

Call in the experts for all your questions about air conditioning Ramona and San Diego

Action AC has been in the HVAC industry for more than 4 decades. One of the reasons we have stayed in the business so long is that we are uncompromisingly committed to staying ahead of advancements. Over the years we have streamlined our procedures and services to be able to cater to all your air conditioning needs. Don’t hesitate to book your free project estimation and we will present you with all the options, so you can make an informed decision that will improve your everyday life today and in the future. Action AC is your reliable, trusted and experienced HVAC contractor for San Diego. We provide the best air conditioning service in Temecula CA. Reach out to us at 800-400-4152 today!

VRF: Top Notch Technology and Why It’s Better For Your Business

There are many options when it comes to choosing the right air-condition system for your commercial business, but there one system that offers the highest efficiency and increased control-ability. This system is called variable refrigerant flow, or VRF and was recently introduced to the United States. VRF is a configuration of an air-condition system that consists of one outdoor condensing unit and multiple indoor units. The term “variable refrigerant flow” describes that system’s ability to control the amount of refrigerant that flows to the multiple indoor evaporator units. This allows for individualized comfort control as well as simultaneous heating and cooling in different zones.

Daikin Industries in Japan designed a VRF system in 1982 known as “variable refrigerant volume,” or VRV. The VRV technology allows for individual climate control in differing zones by circulating only the minimum amount of refrigerant needed at that time. The Daikin VRV system has endless benefits: it minimizes energy consumption, has a design that can be adapted to the local environment, has a flexible layout, and allows for individual control within the building.

VRF and VRV systems are complex, engineered systems that use a multipart refrigerant and oil control circuitry. They can be used for cooling only, heat pumping, or heat recovery. There are two basic types of VRF systems on heat pump models – heat pump systems and energy-recovery:

  • Heat pump systems allow for heating or cooling in all indoor units but not simultaneously. The units either cool or heat. These systems are applied successfully to open spaces, retail stores, cellular office or any other space that requires heating and cooling in the same operational timeframe.
  • Energy-recovery systems are known as VRF-HR and can operate simultaneously in heating and/or cooling mode. This allows the heat removed from a cooled space to be used instead of rejected to the outdoor environment as in traditional heat pump systems. The enhanced features and design of VRF-HR systems has a great potential to produce significant energy savings. Each manufacturer has a proprietary design with unique valve arrangements. VRF-HR systems are best used in buildings where some of the spaces need to be cooled and other spaces need to be heated at the same time, such as medium to large sized buildings with large core space or in spaces on the north and south sides of the building.

Several advantages of a VRF system for your building’s HVAC needs include:

  • User Comfort: the VRF system can respond to individual fluctuations in space load conditions. Each user can set the temperature in their space to their own comfort level versus one control for a variety of spaces in the traditional air condition system. The individuality of the VRF system also allows for separate billing in the case of multiple tenants within one commercial building.
  • Design Flexibility: A single outdoor condensing unit can be connected to several different types of indoor units of varying capacity. Current systems allow for up to 48 indoor units to be connected to one condensing unit.
  • Flexible Installation: VRF systems accommodate installation and commissioning on a floor by floor basis and they are lightweight and offer space-saving features.
  • Energy Efficiency: Testing has indicated that VRF technology can reduce energy consumption by as much as 30 to 40% per year compared to a traditional compressor and it offers high coefficient of performance (COP). This system also minimizes ductwork, or completely eliminates it in some cases, which can reduce duct losses of airflow.

VRF systems might not suit all building situations, but when applied correctly they can greatly improve both the comfort and efficiency of your HVAC solution. Call the professionals at Action Air today for your free consultation on the best HVAC system for your business!