Heat Pump Selection Guide

Do you want to buy a heat pump water heater for your home? But you are confused as to which one to buy? Heat Pump selection can be an overwhelming process.

We are here to make this process easier for you. Here is a heat pump water heater selection guide for you.

How to select a heat pump water heater?

1. Decide on heat pump capacity

This is the most important factor that you should look into, while purchasing a heat pump water heater for your home. In order to select the appropriate heat pump for your home, you must understand which capacity suits your needs.

But how to calculate heat pump capacity?

Heat Pump Capacity depends on the number of members you have in your home. In India it is assumed that each person will require 40 litres of hot water. So, if there are ‘n’ number of members in your family, you will require 40n litres capacity of heat pump water heater.

You need to understand the heat pump capacity calculation properly to do the right heat pump selection.

In India, the following capacities are available:

  • 150 LPD
  • 200 LPD
  • 300 LPD
  • 500 LPD
  • 1000 LPD

Make sure you don’t choose an oversized tank, as it will lead to wastage of energy.

Which heat pump capacity is most suitable for your home?
What capacity is best for your home?

2. Compressor type

The compressor is the heart of a heat pump water heater. So, you need to choose the right type of compressor. It will significantly impact the performance and efficiency of your heat pump. Here are the main compressor types:

  • Single-Speed Compressor: These are the most common and cost-effective option. They operate at a constant speed, providing consistent hot water but may consume more energy.
  • Variable-Speed Compressor: These compressors adjust their speed according to demand, offering higher efficiency and energy savings. They are ideal for households with fluctuating hot water needs.
  • Dual-Compressor: Some advanced models feature both a single-speed and a variable-speed compressor, providing flexibility and optimizing energy usage.

3. Efficiency

Heat Pump Efficiency is the key when selecting a heat pump. It will help to minimize energy consumption and reduce your monthly electricity bills. Look for the following efficiency features:

  • Energy Factor (EF): This rating indicates the overall efficiency of the water heater. Higher EF values signify greater efficiency.
  • Heat Pump Mode: Opt for a unit with a high coefficient of performance (COP) of heat pump, which indicates how efficiently it converts electricity into heat.
  • Insulation: Choose a water heater with adequate insulation. This is important as it will lead to minimization of standby heat loss and improve overall efficiency.

4. Reliability

When selecting a water heater, you must ensure that it will be of good quality and long lasting. For this, you should look for ratings and customer reviews.

A heat pump water heater has high upfront cost, so you should make sure you are selecting a reliable heat pump.

5. Climate

A heat pump water heat pump produces hot water by consuming heat from the surrounding air. This is how a heat pump works. Therefore, it is very important for you to choose a model that will suit your climatic conditions. Some heat pump water heaters work more efficiently in specific temperature ranges. So, you have to make your choice accordingly.

If you live in a colder climate, select a unit designed to operate efficiently even in low temperatures.


You need to make sure that you consider all the factors to make the right heat pump selection choice. To make it a cost effective, energy efficient water heater option for your home, make the right choice.

You can visit SolarClue® to see the best heat pump water heaters. SolarClue® is an online marketplace where solar energy products are sold at discounts up to 50%.

Leave a Reply

Your email address will not be published.