Frequently Asked Questions

What services do you offer?

We offer a full range of air con and refrigeration services for both homes and businesses in the Hertfordshire area:


What type of buildings and industries have you installed units in?

Zero Temp Environmental have been installing air conditioning and refrigeration units for over 27 years in a wide range of commercial properties and domestic buildings.

We have provided installation services to commercial premises such as:

Offices, Restaurants, Shops, Schools, Pubs, Nightclubs, Convenience stores, Hotels, Food production plants, Dairies and many more.


Do you offer free quotes and site visits with no obligations?

Depending on the type of work, we may need to visit the premises, but all of our visits are free with no obligations.


Which locations do you operate in?

We are based in Croxley Green and operate across Hertfordshire including St Albans, Watford, Harrow and Hemel Hempstead as well as within central London and North London.


What sort of training do you have?

All of our staff are City & Guilds trained, and we’re always looking to improve our employees with further training


Are you registered with any trade associations?

We are Refcom F-Gas certified engineers.


Can air conditioners reduce humidity?

The cooling process of air conditioners removes moisture as well as heat from the air using an evaporator coil which condenses water vapour. Often in Summer humidity is the cause of discomfort which makes air conditioning an ideal solution for improving the quality of work and living environments.


Room Size (Sq Ft.)




 100 to 150  8,000
 150 to 250  9,000
 250 to 300  10,000
 300 to 350  12,000
 350 to 400  14,000
 400 to 450  18,000
 450 to 650  25,000

What size air conditioner do I need?

Our experienced and knowledgeable team will be able to advise you on what size air conditioner is needed to suit your property and needs. This is worked out by measuring the size of the room and matching this to the BTU (this is the rating of an air conditioner).





Will I need planning permission to add air conditioning to my property?

For most installations planning permission is no longer required due to the reduced noise and better aesthetics of modern systems. There are some cases where planning permission may be required such as on listed buildings. Our team will be able to advise on if any special permissions will be required to install air conditioning or refrigeration on your property.


If I have a warranty why do I need air con maintenance?

We offer 1-year parts labour and installation warranty whilst the unit itself will have a warranty from the manufacturer. To ensure that your air conditioning unit continues to operate at optimal capacity and energy efficiency whilst remaining reliable regular maintenance is vital. We recommend maintenance at regular intervals to ensure you are getting the best performance and lifespan from your unit.


Is air conditioning noisy?

Modern air conditioning units operate at very low volumes that do not disturb or impact working environments or interrupt quiet nights at home. Loud sounds coming from an air con unit suggest that is not working efficiently and should be investigated.


What is the lifespan of an air conditioner?

Manufacturers of quality units, like the one’s Zero Temp Environmental install, usually state that the expected lifespan of central air units is around 10 years. With regular maintenance which can help to avoid faults and boosts efficiency, you can expect units to last up to 15 years which makes installation an excellent investment.


Contact Us

For a no obligation quote


Phone 01923 254397 


Send an enquiry below


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