About Complete Climate
Meet Zak and Chris, founders of Complete Climate
Complete Climate is a Bristol-based air conditioning and heat pump company run by co-founders Zak Ellis and Chris Preen. Between them, they bring more than 40 years of hands-on experience to homes and businesses across the South West.
The founders
The people behind every installation
Co-Founder
Zak Ellis
Zak leads system design and installation, making sure every air conditioning and heat pump system is sized correctly, fitted neatly and set up to run efficiently.
Co-Founder
Zak Ellis
Zak leads system design and installation, making sure every air conditioning and heat pump system is sized correctly, fitted neatly and set up to run efficiently.
Co-Founder
Chris Preen
Chris looks after customers from the first visit to final handover, and has worked with Mitsubishi Electric systems for years. He makes sure you know exactly what's happening at every stage.
Co-Founder
Chris Preen
Chris looks after customers from the first visit to final handover, and has worked with Mitsubishi Electric systems for years. He makes sure you know exactly what's happening at every stage.
40+
Years of combined
industry experience
Quality installations, done properly
Every installation is planned around your home: the right system, sized correctly and fitted neatly, with tidy pipework and carefully positioned units. We’re not just business owners; we’re engineers at heart.
Because we’re a small, owner-run team, you deal directly with Zak or Chris from the first visit to the final checks. We only fit the highest-quality brands, led by Mitsubishi Electric, so your system is built to last.
Customer reviews
What our customers say
Genuine reviews from homeowners and businesses we’ve worked with across Bristol, Bath and the South West.
10
/10
Mitsubishi air conditioning
Excellent service and workmanship – highly recommend!
We’ve had another fantastic experience with Complete Climate. Chris and Zak were brilliant from start to finish. They were professional, friendly and clearly take great pride in their work. The Mitsubishi air conditioning systems they installed are excellent, and the attention to detail was second to none. They were incredibly tidy throughout the installation and left everything absolutely spotless.
Verified customer
Malmesbury · Oct 2026
Read on Checkatrade
Air conditioning installation
We should have them stuffed.
Chris came round to give me advice about an air-conditioning system. His advice was sensible, knowledgable professional and pragmatic. He made recommendations. He recommended a smaller system than the one I was considering! We talked about the installation costs. I agreed with his proposals. Duly, Chris, together with Zac, and their excellent ‘sorcerer’s’ apprentice Will, arrived spot on 0800hrs to complete the install of our new modest Mitsubishi air con system. The staff, the products and the professionalism of all three installers really was first class. Clean tidy, & efficient. Complete Climate are probably not the cheapest installers I am sure. You get what you pay for. They were personable, competent and tidy. Minimal internal and external disruption. Can’t speak too highly of them. No hesitation about recommending their air con services to anyone thinking about trying to be cooler or hotter! Delighted.
Alan B.
Aug 2026
Full review
10
/10
Air conditioning installation
Great service and perfect workmanship.
Had an aircon unit fitted on 26/10/26 by Complete Climate. The second they have installed for me in the last couple of years. Another great job! Their workmanship is first rate. I wouldn’t hesitate to recommend them.
Verified customer
Martock · Oct 2026
Read on Checkatrade
Multi-room air conditioning
Absolute class from start to finish – can't recommend them highly enough
I've just had a multi-split system installed in two of our bedrooms upstairs, along with a single split to cover our large open-plan kitchen, dining, and family room on the ground floor. The entire job is now complete, and honestly, I could not be happier with the result. I completely echo what others have said on here about Chris, Zak, and Will—they really are a different league. From day one, the communication and quoting process with Chris was seamless. They arrived exactly when they said they would, and the quality of the work is absolutely top-notch. They are true experts who look out for the best interests of your home, providing professional, benchmarked suggestions based on real experience rather than just trying to sell you a standard box. The lads worked incredibly hard, finished right on time, and left the place absolutely spotless. Before they left, they took the time to properly educate me on how to use the new systems and made sure I was completely up and running on the app. Knowing that Complete Climate will be handling the ongoing maintenance of our units gives me massive peace of mind. It's so rare to find a business where the products, recommendations, and customer service are all consistently high quality. Absolute top marks to the team!
Hugo
Jun 2026
Full review
10
/10
Air conditioning installation
Air conditioning, professionally installed
The summers are getting hotter and both my wife and I suffer from the heat so we decided to get air conditioning installed. We heard great things about Complete Climate Ltd from friends and they seemed like a reliable company that would do a professional job. Chris gave us a reasonable quote within our budget and we agreed on an installation date. We’re so glad we chose Complete Climate! They finished the job in one day and everything was done exceptionally well. The piping and cabling outside were neatly installed in smart black trunking, giving the area a tidy look.
Verified customer
Bristol · Sep 2026
Read on Checkatrade
Air conditioning installation
Perfect service from the start
Incredibly great service from the guys at Complete Climate. Very professional, extremely friendly guys, kept me in the loop throughout the process and did a perfect job on the day of installation. Fully recommend!
Matt O.
Sep 2026
Full review
10
/10
Mitsubishi air conditioning
Top job from top blokes
From the initial phone call with Chris to Zak and Will completing the job the following day, everything was very professional, very organised, very friendly and I honestly can't fault the lads or the job. The kit used (Mitsubishi) is top notch. Were they the cheapest quote? No, but they were still very competitive, and sometimes paying an extra few quid to get a way better service is the only way to go. They're a small firm, so you are guaranteed a personal service rather than just some call centre passing your job onto a subby. 10 out of 10. If you need aircon these are the boys.
Dale C
Bristol · Jun 2026
Read on Checkatrade
Air conditioning & heat pumps
Complete Climate really are the complete solution
Chris, Zak and Will cannot be rated highly enough. Over the last few years Complete Climate has helped us keep our family home temperature managed by installing and maintaining various air-con and cost/climate effective heat-source solutions. Expert knowledge, prompt service and incredible value. First world problems sure, but these guys really are the best.
Paul B.
Jun 2026
Full review
10
/10
Air conditioning installation
100% recommendation
From the very start Chris was supportive and informative, he was able to explain all our options to us and work with us to get the best solution. The work was completed to a very high standard and whilst Chris was pricey than the other quote, we had more trust in what he could provide and we weren’t disappointed, highly recommend Chris and his team.
Verified customer
Bristol · Jun 2026
Read on Checkatrade
10
/10
Mitsubishi air conditioning
Excellent service and workmanship – highly recommend!
We’ve had another fantastic experience with Complete Climate. Chris and Zak were brilliant from start to finish. They were professional, friendly and clearly take great pride in their work. The Mitsubishi air conditioning systems they installed are excellent, and the attention to detail was second to none. They were incredibly tidy throughout the installation and left everything absolutely spotless.
Verified customer
Malmesbury · Oct 2026
Read on Checkatrade
Air conditioning installation
We should have them stuffed.
Chris came round to give me advice about an air-conditioning system. His advice was sensible, knowledgable professional and pragmatic. He made recommendations. He recommended a smaller system than the one I was considering! We talked about the installation costs. I agreed with his proposals. Duly, Chris, together with Zac, and their excellent ‘sorcerer’s’ apprentice Will, arrived spot on 0800hrs to complete the install of our new modest Mitsubishi air con system. The staff, the products and the professionalism of all three installers really was first class. Clean tidy, & efficient. Complete Climate are probably not the cheapest installers I am sure. You get what you pay for. They were personable, competent and tidy. Minimal internal and external disruption. Can’t speak too highly of them. No hesitation about recommending their air con services to anyone thinking about trying to be cooler or hotter! Delighted.
Alan B.
Aug 2026
Full review
10
/10
Air conditioning installation
Great service and perfect workmanship.
Had an aircon unit fitted on 26/10/26 by Complete Climate. The second they have installed for me in the last couple of years. Another great job! Their workmanship is first rate. I wouldn’t hesitate to recommend them.
Verified customer
Martock · Oct 2026
Read on Checkatrade
Multi-room air conditioning
Absolute class from start to finish – can't recommend them highly enough
I've just had a multi-split system installed in two of our bedrooms upstairs, along with a single split to cover our large open-plan kitchen, dining, and family room on the ground floor. The entire job is now complete, and honestly, I could not be happier with the result. I completely echo what others have said on here about Chris, Zak, and Will—they really are a different league. From day one, the communication and quoting process with Chris was seamless. They arrived exactly when they said they would, and the quality of the work is absolutely top-notch. They are true experts who look out for the best interests of your home, providing professional, benchmarked suggestions based on real experience rather than just trying to sell you a standard box. The lads worked incredibly hard, finished right on time, and left the place absolutely spotless. Before they left, they took the time to properly educate me on how to use the new systems and made sure I was completely up and running on the app. Knowing that Complete Climate will be handling the ongoing maintenance of our units gives me massive peace of mind. It's so rare to find a business where the products, recommendations, and customer service are all consistently high quality. Absolute top marks to the team!
Hugo
Jun 2026
Full review
10
/10
Air conditioning installation
Air conditioning, professionally installed
The summers are getting hotter and both my wife and I suffer from the heat so we decided to get air conditioning installed. We heard great things about Complete Climate Ltd from friends and they seemed like a reliable company that would do a professional job. Chris gave us a reasonable quote within our budget and we agreed on an installation date. We’re so glad we chose Complete Climate! They finished the job in one day and everything was done exceptionally well. The piping and cabling outside were neatly installed in smart black trunking, giving the area a tidy look.
Verified customer
Bristol · Sep 2026
Read on Checkatrade
Air conditioning installation
Perfect service from the start
Incredibly great service from the guys at Complete Climate. Very professional, extremely friendly guys, kept me in the loop throughout the process and did a perfect job on the day of installation. Fully recommend!
Matt O.
Sep 2026
Full review
10
/10
Mitsubishi air conditioning
Top job from top blokes
From the initial phone call with Chris to Zak and Will completing the job the following day, everything was very professional, very organised, very friendly and I honestly can't fault the lads or the job. The kit used (Mitsubishi) is top notch. Were they the cheapest quote? No, but they were still very competitive, and sometimes paying an extra few quid to get a way better service is the only way to go. They're a small firm, so you are guaranteed a personal service rather than just some call centre passing your job onto a subby. 10 out of 10. If you need aircon these are the boys.
Dale C
Bristol · Jun 2026
Read on Checkatrade
Air conditioning & heat pumps
Complete Climate really are the complete solution
Chris, Zak and Will cannot be rated highly enough. Over the last few years Complete Climate has helped us keep our family home temperature managed by installing and maintaining various air-con and cost/climate effective heat-source solutions. Expert knowledge, prompt service and incredible value. First world problems sure, but these guys really are the best.
Paul B.
Jun 2026
Full review
10
/10
Air conditioning installation
100% recommendation
From the very start Chris was supportive and informative, he was able to explain all our options to us and work with us to get the best solution. The work was completed to a very high standard and whilst Chris was pricey than the other quote, we had more trust in what he could provide and we weren’t disappointed, highly recommend Chris and his team.
Verified customer
Bristol · Jun 2026
Read on Checkatrade
10
/10
Mitsubishi air conditioning
Excellent service and workmanship – highly recommend!
We’ve had another fantastic experience with Complete Climate. Chris and Zak were brilliant from start to finish. They were professional, friendly and clearly take great pride in their work. The Mitsubishi air conditioning systems they installed are excellent, and the attention to detail was second to none. They were incredibly tidy throughout the installation and left everything absolutely spotless.
Verified customer
Malmesbury · Oct 2026
Read on Checkatrade
Air conditioning installation
We should have them stuffed.
Chris came round to give me advice about an air-conditioning system. His advice was sensible, knowledgable professional and pragmatic. He made recommendations. He recommended a smaller system than the one I was considering! We talked about the installation costs. I agreed with his proposals. Duly, Chris, together with Zac, and their excellent ‘sorcerer’s’ apprentice Will, arrived spot on 0800hrs to complete the install of our new modest Mitsubishi air con system. The staff, the products and the professionalism of all three installers really was first class. Clean tidy, & efficient. Complete Climate are probably not the cheapest installers I am sure. You get what you pay for. They were personable, competent and tidy. Minimal internal and external disruption. Can’t speak too highly of them. No hesitation about recommending their air con services to anyone thinking about trying to be cooler or hotter! Delighted.
Alan B.
Aug 2026
Full review
10
/10
Air conditioning installation
Great service and perfect workmanship.
Had an aircon unit fitted on 26/10/26 by Complete Climate. The second they have installed for me in the last couple of years. Another great job! Their workmanship is first rate. I wouldn’t hesitate to recommend them.
Verified customer
Martock · Oct 2026
Read on Checkatrade
Multi-room air conditioning
Absolute class from start to finish – can't recommend them highly enough
I've just had a multi-split system installed in two of our bedrooms upstairs, along with a single split to cover our large open-plan kitchen, dining, and family room on the ground floor. The entire job is now complete, and honestly, I could not be happier with the result. I completely echo what others have said on here about Chris, Zak, and Will—they really are a different league. From day one, the communication and quoting process with Chris was seamless. They arrived exactly when they said they would, and the quality of the work is absolutely top-notch. They are true experts who look out for the best interests of your home, providing professional, benchmarked suggestions based on real experience rather than just trying to sell you a standard box. The lads worked incredibly hard, finished right on time, and left the place absolutely spotless. Before they left, they took the time to properly educate me on how to use the new systems and made sure I was completely up and running on the app. Knowing that Complete Climate will be handling the ongoing maintenance of our units gives me massive peace of mind. It's so rare to find a business where the products, recommendations, and customer service are all consistently high quality. Absolute top marks to the team!
Hugo
Jun 2026
Full review
10
/10
Air conditioning installation
Air conditioning, professionally installed
The summers are getting hotter and both my wife and I suffer from the heat so we decided to get air conditioning installed. We heard great things about Complete Climate Ltd from friends and they seemed like a reliable company that would do a professional job. Chris gave us a reasonable quote within our budget and we agreed on an installation date. We’re so glad we chose Complete Climate! They finished the job in one day and everything was done exceptionally well. The piping and cabling outside were neatly installed in smart black trunking, giving the area a tidy look.
Verified customer
Bristol · Sep 2026
Read on Checkatrade
Air conditioning installation
Perfect service from the start
Incredibly great service from the guys at Complete Climate. Very professional, extremely friendly guys, kept me in the loop throughout the process and did a perfect job on the day of installation. Fully recommend!
Matt O.
Sep 2026
Full review
10
/10
Mitsubishi air conditioning
Top job from top blokes
From the initial phone call with Chris to Zak and Will completing the job the following day, everything was very professional, very organised, very friendly and I honestly can't fault the lads or the job. The kit used (Mitsubishi) is top notch. Were they the cheapest quote? No, but they were still very competitive, and sometimes paying an extra few quid to get a way better service is the only way to go. They're a small firm, so you are guaranteed a personal service rather than just some call centre passing your job onto a subby. 10 out of 10. If you need aircon these are the boys.
Dale C
Bristol · Jun 2026
Read on Checkatrade
Air conditioning & heat pumps
Complete Climate really are the complete solution
Chris, Zak and Will cannot be rated highly enough. Over the last few years Complete Climate has helped us keep our family home temperature managed by installing and maintaining various air-con and cost/climate effective heat-source solutions. Expert knowledge, prompt service and incredible value. First world problems sure, but these guys really are the best.
Paul B.
Jun 2026
Full review
10
/10
Air conditioning installation
100% recommendation
From the very start Chris was supportive and informative, he was able to explain all our options to us and work with us to get the best solution. The work was completed to a very high standard and whilst Chris was pricey than the other quote, we had more trust in what he could provide and we weren’t disappointed, highly recommend Chris and his team.
Verified customer
Bristol · Jun 2026
Read on Checkatrade
Based in Bristol
Serving the South West
Covering Bristol, Bath and the South West
We’re based in Bristol, and install and service air conditioning and heat pumps for homes and businesses across the South West, including:
Bristol & Bath
Somerset
Gloucestershire
Wiltshire
Dorset
South Wales
Not sure if we cover your area? Get in touch for a free, no-obligation quote.
REFCOM and F-Gas certified air conditioning and heat pump specialists
REFCOM and F-Gas certified air conditioning and heat pump specialists
REFCOM and F-Gas certified air conditioning and heat pump specialists
We only fit the highest-quality brands, led by Mitsubishi Electric,
alongside Daikin, Fujitsu, Panasonic, LG and Toshiba
alongside Daikin, Fujitsu, Panasonic, LG and Toshiba
We only fit the highest-quality brands, led by Mitsubishi Electric,
alongside Daikin, Fujitsu, Panasonic, LG and Toshiba
alongside Daikin, Fujitsu, Panasonic, LG and Toshiba