Jan 072014
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Most often a home has one heating and cooling system, whether a conventional system or a ductless heat pump or air conditioning system.  Usually a full ductless system, again whether a heat pump or an air conditioner, is installed, the old system is taken off-line or completely replaced.  This is because in most cases it does not make sense to have two major systems running at the same time – it is just too hard to manage this type of set-up efficiently.  But there are excpetions to this rule, and times that a ductless air conditioning or heat pump system actually makes sense, for example:

1. When your house is zoned and your existing system is having trouble effectively heating or cooling a particular zone you might install a ductless air conditioning or heat pump system in that zone only.  In some cases you may intend to entirely replace your existing system but this initial step is more cost-effective for now.

2. A larger home that is very difficult to heat or cool could e a candidate for dual systems.  This is especially true if the existing conventional system has lost some effectiveness over time, or your home has become particularly drafty in a way that is difficult to fix.  A ductless heating or cooling system that acts like a boost to a conventional system is a possibility.

3. Finally, many people have dual systems because one is better at heating nd one is better at cooling, even if they both can accomplish both tasks.  For example, if your existing system struggled to effectively air condition your home, you might install a ductless air conditioner or heat pump even if, at least for now, you only use the air conditioner.

4. Finally, a renewable energy system often needs a booster, such as when a home solar energy system is affected by a few days with no sun.  Ductless can provide the boost.

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