A heat pump is a major component of an HVAC system. Sizing a heat pump to adequately meet the needs for not only the entire HVAC unit, but also the home or office environment requires you to take into consideration the size of the home or office to be heated.

A heat pump pulls heat from outdoor air, but as the outdoor air temperature drops, so does the ability of the heat pump to pull heat from that same air. Nevertheless, heat is required to maintain comfortable indoor temperatures. Certified and experienced HVAC technicians are aware of this delicate balance point, or the heat pump's capacity to meet indoor temperature needs as outdoor temperatures drop.

A heat pump's overall capacity must match this balance point for office scenarios and homes. In most cases, that balance point hovers just above or below 32° Fahrenheit.

Benefits of a Heat Pump

A heat pump offers both heating and cooling capacity. A heat pump is an HVAC component that provides as much as three times more heating capacity than an equal amount of electrical energy it consumes, according to ConsumerEnergyCenter.org. Heat pumps can reduce electricity usage for heating as much as 35 to 40%.

Sizing a Heat Pump

If your heat pump is too large or too small for cooling or heating needs, you're going to end up wasting money. Varieties of measurements need to be taken in order to adequately size the best heat pump capacity to meet your energy or heating needs.  Installing a pump that's too small to heat effectively won't bring your home or office to comfortable or desired temperatures. On the other hand, a heat pump that is too large may turn on and off on a frequent basis, adding to wear and tear on that machine as well as wasting money on energy.

A variety of online calculators can help HVAC technicians or homeowners adequately size the right capacity for a heat pump based on your needs and environment.

A number of steps can help you determine just the right size:

• Measure room size and ceiling height to calculate room volume in meters.
• Next, take into consideration the type of insulation used in the walls or ceilings of your office or home. Heating factors will differ depending on inside and outside walls. For example, if walls and ceilings are both insulated, your insulation factor may be higher than a room with two outside walls without insulation Size and location of windows also comes into play.
• Next, divide the room's volume by your heating factor. This measurement provides HVAC technicians or homeowners with an optimal heat pump kilowatt size or output to ensure adequate heating capacity.

While it's recommended that homeowners know as much as possible about HVAC systems, including heat pump sizing requirements, it's recommended to engage the services of a certified HVAC technician or professional to determine the overall heating requirements for a home or office environment. HVAC technicians know and are familiar with factoring in areas of heat loss as well as insulation factors.

Checking Heat Pump Capacity

Checking your current heat pump capacity will help you determine whether you have the most efficient heat pump for your home or office environment. How do you check the capacity of your heat pump?

• Determine the overall volume of the room or environment in cubic feet. Multiply length by height by width to get room volume. This measurement is known as volume in cubic feet.
• In an office environment, determine how many people typically occupy the room. Multiply the number of people generally using the environment by 500 BTU per hour.
• Add the number of people using the environment by 500 BTU per hour and your room volume measurement.

Your result should give you the capacity rating of your current heat pump. Such information should be found on the heat pump's label, but you may also look up manufacture information online to determine capacity for a variety of heat pump models.

Online resources such as EnergyStar.gov, offer tutorials on sizing heat pumps and other information regarding HVAC systems. Regardless of whether you have an office or home environment, choose a heat pump that provides the best in heating and cooling capacity when in use. When in doubt about either the sizing or capacity of your heat pump, contact a certified and experienced HVAC technician. Doing so not only keeps you comfortable year-round, but also helps save money at the same time.