Healthy & Energy Efficient Homes In Winter

Stopping unnecessary drafts during winter is the first step towards warm, healthy and energy efficient homes. A temperature of 17C is comfortable when moving around the house however when watching television or sitting for longer periods this temperature should be closer to 20C.

There are many ways to economically save power and provide a healthy home that take a minimal amount of time and labour. While all new homes should have double glazing, older homes will often suffer from chilly drafty windows. For a quick fix a range of self -adhesive strips are available from hardware stores. However window replacement and thermal drapes are a definite option to stop unwanted cold air circulating in the winter.

Of course air should always be able to circulate freely around your home and doors and windows should be regularly opened to avoid trapped, stale air.

There has been some confusion regarding how long a heat pump should be operating for. To achieve the best performance in all domestic situations from your heat pump, we recommend you leave it on at all times over the winter months so a steady temperature is maintained i.e don’t turn off; turn down if you are too warm or will be out of the room or home. This does not mean we recommend you leave your heat pump running continuously. Any time where windows or doors remain open it would obviously not be energy efficient for your heat pump to remain on.

Filed under: Ventilation Systems

Cheap Heat Pumps

With all the homes that are either red zoned or being demolished there are a number of 2nd hand heat pumps available. We regularly get asked to price removal and reinstallation of these units however there are several things to keep in mind when considering purchasing one of these systems.

  • We need a power supply (or generator) on site to recover the refrigerant gas prior to removing the units as it is against the law to release the gas into the atmosphere.
  • In doing some of this work we have discovered a number of units have suffered damage to circuit boards largely as a result of power fluctuations during the earthquakes.We have reinstalled some of these units only to discover after installation that they have issues particularly with plant over 5 years old. Any equipment under 5 years which has been operating recently is unlikely to be an issue but if you have no knowledge of the plants operating history it is a risk when reinstalling particularly from a parts availability point of view.
  • From our experience relocating heat pumps can be a lottery. Even plant which has been operational can cause problems once moved.

Filed under: Ventilation Systems

Are you ready for winter?

Daylight saving is about to finish, it’s getting cooler in the mornings and the wind is beginning to whistle through the streets. Yes, winter will soon be upon us once more.

We always have a huge influx of orders with the onset of winter. However many people will be caught out by the first cold day before realising that something needs to be done.To ensure your home is healthy and warm for the oncoming winter, it is vital you act now.

Call Hartnell Coolheat today or come in to our showroom and see how a heat pump system can keep the worst of winter at bay.

Filed under: Ventilation Systems


As a result of the Canterbury earthquakes many people are looking to rebuild and here at Hartnell Coolheat we recommend you insist upon double glazing and the highest grade wall and ceiling insulation. This reduces the amount of heating required giving a quick pay back on your original investment.

While on the subject of building, we were extremely pleased to be associated with Phil Benton Builders who won NZ Master Builder House Of  The Year 2013 for their Poynder Ave, Fendalton entry. Hartnell Coolheat undertook all the under floor hot water heating, air conditioning and swimming pool heating. This was a demanding project requiring a high level of finish. It gave us immense satisfaction to be part of the completion of this award winning project.

Filed under: Ventilation Systems

The Colour Connection

Hi All. As Cantabrians we are aware of the thousands of homes and businesses being programmed for repair or rebuild in our region. There are various climate control options available and our experienced design team can help you decide on an air conditioning system to best meet your individual needs.

Many residential and commercial clients now prefer a heat pump system that will either coordinate with other room features or subtlety blend into the background. Therefore custom - painted systems have become hugely popular in recent times, with the extra effort in matching unit colours delivering a markedly different end result for the interior design. Ceiling and wall grilles for ducted systems can also now seamlessly fit into a room’s colour scheme. The extra step of colour matching may seem like a small one, but it can make all the difference in the end result.

Filed under: Ventilation Systems

Be cool in hot water

We are getting near that time of year again where we start to think of BBQ’s and hot summer days by the pool.As swimming pools increase in popularity many people are looking at ways to enjoy them without compromising the environment or the bank balance.Heat Pump Technology is providing the answer.Most outdoor swimming pools now use heat pumps for water heating because it is such an economical method.

Due to our climate here in Canterbury there has been an increase in the demand for indoor pools which allow use all year round. It’s here that specialist applications of heat pump technology are delivering even greater levels of economy and energy efficiency.This occurs with heating incoming air from the outside and then circulating this air throughout the pool area.

As pool rooms require adequate aeration to prevent health issues and moisture build up the ventilation system needs to be capable of removing this moist, warm air from the room.This air is then exhausted via the outdoor heat pump where the heat can be recovered thereby reducing the need for the unit to work as hard. This form of waste heat recovery is highly efficient in reducing overall energy usage.

Whether it’s regarding a heat pump for a pool or you just want some specialist advice for air conditioning and ventilation give us a call here at Hartnell Coolheat.

Filed under: Ventilation Systems

Spring is here

Hi all! Well Spring is here and its probably time to think about a heat pump service before switching over to cooling in summer.Like all things in life, a yearly check up can also do wonders for your heat pump system.

The Hartnell Coolheat 10 Point Service Check is a thorough maintenance test and clean. Our qualified technicians check everything from your remotes fault codes to the electrical connections, the system operations, noise levels, and that’s as well as a thorough indoor / outdoor unit clean.We supply a record of our findings and report anything that may need urgent attention … on top of all that we’ll even replace your remotes batteries!

Call us today to book a 10 Point Service Check - Cristchurch 03 3663952 or North Canterbury 03 313 8014

Filed under: Ventilation Systems


On one of my calls recently a lady mentioned the following problem.Some friends of hers had just moved into a new house and were unable to read their newspaper at their dining table due to the high wall heat pump directly above the table blowing the newspaper around!

This situation can arise in a new house where the developer has asked the electrician to fit a heat pump in the house.In many of these cases the installer puts the unit in a position which is easiest for him to install with no thought to the layout of the room or future comfort of the occupant.This can mean the heat pump is not necessarily sized correctly for the area concerned or positioned correctly for future placement of furniture once the house is occupied.

With a heat pump, you have a product that produces moving warm or cold air and therefore the installation position is very important.  Ensuring the heat pump has the correct capacity for the area is also of paramount importance .

Hartnell Coolheat have a design team ready to quote for all air conditioning needs from plans which would eliminate basic errors like those mentioned above. Remember it is much easier to get it right in the first instance rather than try and remedy it once the heat pump is already installed!

Filed under: Ventilation Systems

Rebuilding Canterbury

Hi All. As Cantabrians we are aware of the thousands of homes and businesses being programmed for repair or rebuild in our region.Whether rebuilding or repairing Hartnell Coolheat can offer a complete home heating assessment either from architectural plans or from a site visit.There are various climate control options available and our experienced design team can help you decide on an air conditioning system to best meet your individual needs.

Heating, ventilation and air conditioning are all we do and combining that with over 30 years of experience in the industry means we are good at it! Many builders offer a “package deal” on a home including heat pumps. It is worth getting a reputable company to discuss your options with you to ensure your climate control system is catered to your individual needs.Our experienced team at 36 Brisbane Street, Sydenham or North Canterbury at 18 Albert Street , Rangiora, are ready to help you get the best climate control solution.

Filed under: Ventilation Systems

” We Really Care “

I recently spent 10 days in Honolulu & yes it was lovely.

Being in the trade one tends to look around at Air Conditioning Systems and the really interesting thing to report is that Daikin must lead the field in the USA. They are everywhere you look.

It does however take a little time to come to terms with walking off the footpath at 30 degrees into a department store at 18 degrees!

Well we really are underway with the “heating season now”.A bit more chilly weather whilst I was away and the orders are now starting to flow.

Don’t forget Hartnell Coolheat has been around for a long time, has vast experience in all aspects for Industrial, Commercial & Domestic Systems. The message from our company is ” We Really Care ” and are only interested in happy clients.

Graham Parker

Filed under: Ventilation Systems