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Claim this listingOptimum Renewables LTD
5.0
102 Google reviews
1–2 days
Typical install time
£7,500
BUS grant amount
About Optimum Renewables LTD
Optimum Renewables LTD is an MCS certified air source installer based in East Sussex. They are registered with the Boiler Upgrade Scheme, meaning they can help you claim up to £7,500 towards your installation.
Coverage area
Based in East Sussex, TN37 7AD
Areas served:
Reviews
5.0
102 Google reviews
Based on verified Google reviews
Greg Templeman
Zak at Optimum HVAC has been reliably servicing our home boiler for years. He is consistently punctual, thorough, and conducts himself with the utmost professionalism. It is great to have a trustworthy local company we can count on year after year. I highly recommend their services.
christine blewitt
Zak Hurst fitted my boiler when it was new 6 years ago, into my house and has serviced it every year since. He also services a boiler annually which he fitted into my rented out flat. He is very hard working and meticulous. He takes great pride in his work. He is a friendly, genuine young man and l have no hesitation in giving him a 5 star review.
clive richardson
Zac has done a number of jobs for us over the past few years,all have been completed very professionally. We’ve no hesitation in recommending him.A most ameniable person too. Clive and Lucie Rishardson
Mark Alastor
Zak came to replace our old boiler with a new combi...a 4 day job. He was a pleasure to work with. He showed up on time and cleaned up daily. His workmanship was perfect and he kept us up to date on progress as he went along. I wouldnt hesitate to recommend him for future work.
richard georgiou
I don't often write reviews but my experience with this company was truly outstanding. He picked up the phone, was available at short notice and showed up on time. Then he fixed the problem quickly and proficiently and was nice to boot. So pleased I've finally found a plumber I can call on when needed. Outstanding.
Showing 5 of 102 reviews. View all on Google
Frequently asked questions
How do I know you’re properly qualified and certified to install heat pumps?
We are MCS‑certified and registered with an approved consumer protection/competent person scheme, which is essential for quality assurance and to access grants like the Boiler Upgrade Scheme (BUS).
Can you tell me if a heat pump is actually suitable for my home?
We carry out a detailed home assessment, including property type, insulation levels, existing heating system and available outdoor space, to confirm whether a heat pump is a good fit.
What type and size of heat pump will you recommend for my property, and why?
We design the system using a heat‑loss calculation for your home, then match the correct kW size and model (for example, air‑source vs ground‑source) so it runs efficiently and reliably.
What will the full installation cost be, and what’s included in your quote?
Our fixed quote clearly lists the heat pump, cylinder, controls, labour, scaffolding (if needed), electrical work and any radiator or pipework upgrades, so you know exactly what you’re paying for.
Can you help me access government grants like the Boiler Upgrade Scheme?
Yes, as an MCS installer we can confirm your eligibility, apply for the BUS grant (worth up to £7,500) on your behalf and deduct it directly from your quote.
How much disruption should I expect during installation, and how long does it take?
A typical air‑source heat pump installation takes around 2–5 days, and we’ll agree locations for the indoor and outdoor units, manage any planning considerations and keep you informed each day.
Will I need to replace my radiators or upgrade anything else in my home?
After the heat‑loss survey, we’ll advise if any radiators, pipework, electrics or hot‑water cylinder need upgrading so the system can run efficiently at lower flow temperatures.
How noisy is the outdoor unit and where will it be installed?
Modern heat pumps are designed to be quiet and must meet UK noise regulations; we’ll position the unit to minimise any impact on you and your neighbours and comply with local planning rules.
What warranties, servicing and aftercare do you provide?
You’ll get manufacturer warranties on the heat pump plus our workmanship guarantee, and we offer ongoing servicing and support to keep your system performing at its best.
What running costs and savings can I realistically expect compared to my current boiler?
We’ll estimate your likely annual running costs and potential savings based on your current fuel type, insulation level and tariffs, using real‑world performance data rather than lab figures.
Boiler Upgrade Scheme
Up to £7,500
off your heat pump installation
This installer handles the full BUS grant application — deducted directly from your quote. No upfront payment needed for the grant amount.
Scheme open until 2028 — limited funding available
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