Air / water heat pumps for your home
Use renewable energy to heat your home and save energy.
Air-to-water heat pumps: The principle
The principle of the heat pump is to capture the calories
Present in the outside air.
This is the principle of thermodynamics.
The calories present in the outside air are transported to the interior of the house thanks to a closed and airtight refrigerating circuit. The installation consists of an outdoor unit that will draw the calories present in the air down to -10° celsius to send them to a compressor.
The captured energy will be multiplied by 4 and will then be conveyed in the central heating circuit of the house as well as possibly in the domestic hot water circuit. A simple and efficient installation by raising or replacing your old boiler.
The energy contained in the air being free, you only consume the energy necessary for the operation of the heat pump. The installation of a heat pump allows you to divide by 3 your energy consumption for heating your home. An air water heat pump can also cool the air in summer.
How air-water heat pumps work？
How does it work?
The heat pump is composed of a compressor, two exchangers :
One to capture energy from the outside (evaporator), the other to return it to the inside (condenser) and an expansion valve. The compressor will suck in the refrigerant, which is in the form of gas at low temperature.
By compressing the gas, its temperature will rise along with its pressure.
The hot gas will be directed to an exchanger (called a condenser) in which a fluid to be heated circulates.
The heat of the environment present in the air is free energy that is constantly renewed thanks to solar radiation and rainfall.
The heat pump takes this heat from the environment and transfers it to a higher temperature level in the homes to heat them.
It is during these operations that the very low consumption of electrical energy takes place.
In fact, for 1 kwh of electrical energy consumed, 3 to 4 kwh of thermal energy is released.
The heat pump thus makes it possible to cover 100% of the heating needs of a dwelling.
Consuming only 30% of electrical energy.
The remaining 70% is drawn from the air while preserving the environment.
The heat pump is an efficient solution for producing heat from free energy. Drawn from the environment.
The installation of an air-water heat pump: Implementation
Mise and oeuvre
The installation of a heat pump during renovation cannot be carried out by only if there is an existing central heating system.
The outdoor unit should be installed outdoors on a flat, stable floor (ideally a concrete slab) in a dry, ventilated area.
The indoor unit is usually placed in replacement of your old boiler to facilitate its connection with the existing heating circuit and as close as possible to the outdoor unit to limit the distance of refrigerant circulation between the two.
In fact, the refrigerant has an environmental impact 30 times greater than that of co2 on the environment. Its use must therefore be used sparingly and controlled in a sealed circuit.
Air-to-water heat pumps work with conventional radiators as well as with low or high temperature emitters.
It is also possible to install a heat pump as a boiler backup.
The current boiler is kept and will then be used as a backup on very cold days when the heat pump is no longer working (above a certain outdoor temperature, generally between -10 and -15°c).
The installation must be carried out by a professional.
Remember to check that your installer has the qualipac label, an independent label that carries out regular checks on installers’ sites.
A heat pump requires annual maintenance to optimize performance and increase its lifespan.
It is mandatory to check the refrigerant circuit for leaks every year. And must be carried out by a company holding the prefectoral approval or the attestation of capacity.
Before installing your heat pump, make sure that your installer has this certificate so that he can carry out the maintenance of your heat pump.
Air-to-water heat pumps: Technical data
The dimensioning of the heat pump
First of all, the dimensioning of the heat pump is of paramount importance.
An incorrectly dimensioned heat pump will not cover the heating needs of the home in the event of undersizing or will run the risk of short-circuits and electrical overloads in the event of oversizing leading to a drop in the cop and reducing the service life of the equipment.
The dimensioning of the heat pump is carried out as follows
According to the kilowatt heat output (heat production capacity of the heat pump).
How to calculate the required heat pump output? Simply multiply the volume of the house to be heated by the difference between the lowest outside temperature and the desired inside temperature, multiplied by the insulation coefficient of the house ( =1 if the house is normally insulated, 0.95 if it is very well insulated, 1.2 if it has air leaks, …).
Example: A house of 100m² or 250m3 where it is -9°celsius at least in winter, for which one wishes to have an interior temperature of 20°c, which is well insulated (insulation coefficient 0.95) will require a heat pump with a capacity of :
250 x (20-(-9))*0.95 = 6887.50 or 6.90kw.
In addition to the dimensioning of your heat pump which is essential in the efficiency of the installation, the cop: Coefficient of performance is the reference unit of a heat pump.
What is the cop?
It is the power restored in relation to the power consumed.
That is to say, the quantity of kilowatt-hours produced for 1 kwh consumed.
The higher the cop, the more efficient the heat pump.
Attention, to benefit from the tax credit, the cop must be greater than or equal to 3.3.
How much does it cost to install an air-water heat pump?
What is the cost?
The installation of an air water heat pump is an important investment that will be amortized by the energy savings made.
For a turnkey installation of a heat pump, it is necessary to plan between 65 and 90€ per m².
This includes the outdoor unit, the indoor unit, the various supplies as well as the labor for installation and commissioning. To this must be added for a new construction, the price of the underfloor heating (the slab + the heating circuit) or radiators.
Tax credit for the installation of a heat pump a reduced investment thanks to the tax credit.
The french state wishes to help the development of the use of renewable energies.
15% tax credit for heat pumps whose purpose is to produce heat.
Attention only heat pumps with a cop greater than or equal to 3.4 are eligible for the tax credit.
On what amount of expenses does the tax credit apply?
The tax credit covers the price of equipment and materials, excluding labor, meeting the characteristics.
What is the amount of expenses eligible for the tax credit?
For the same taxpayer and the same dwelling, the amount of expenses eligible for the tax credit may not exceed, for a period of five consecutive years between january 1, 2010 and december 31, 2015, the sum of € 8,000 for a single person, widow or divorced and € 16,000 for a couple subject to joint taxation. This sum is increased by €400 per dependant within the meaning of articles 196 to 196b.
To find out your rights to the tax credit, you are advised to refer to the provisions of article 200 quater of the general tax code.
For the application of this measure, it is strongly recommended to refer to :
The website www.impots.gouv.fr (page on the tax credit)
Article 200 quater of the general tax code, article 90 of the 2005 finance act, article 83 of the 2006 finance act, article 109 of the 2009 finance act and article 80 of the 2010 finance act.
The tax instructions 5b-26-05, 5b-17-06 and 5b-17-07
The decrees of february 9, 2005, december 12, 2005 and november 13, 2007 issued for the application of articles 200 quater and 200 quater a of the general tax code relating to capital expenditure on the main dwelling and amending annex iv to this code
Sections 81 to 83 of the 2012 finance act
Tax credit for the installation of a heat pump regional aid, departmental, and anah.
Some regions, town halls or the anah also subsidize the installation of photovoltaic panels by granting financial aid. Find out more directly from these administrations or from your espace info energie.
Vat reduced for the installation of a heat pump vat reduced to 7% for livings over two years.
An investment that quickly pays for itself thanks to the energy savings made:
You divide by 3.3 your energy consumption for heating your home.
This can represent several hundred euros per year.
Air-to-water heat pump: Environmental impact
Energy consumption divided by 3
By heating your home with a heat pump, in addition to the significant savings,
The amount of energy not consumed compared to conventional heating significantly protects our planet.
Even if the heat pump requires electricity consumption, the environmental impact is divided by three due to the low power consumption of the heat pump.
Three times less electricity consumed means three times less electricity to produce and therefore three times less greenhouse gas emissions.
As a boiler replacement, it is 100% savings of fossil energy (fuel oil, coal, gas) which are in the process of being depleted.
Using the calories present in the air is to contribute to the protection of our environment.
Renewable energies are inexhaustible
And contributes to the good health of our earth.