Industrial & laboratoryCTS: a constant 18°C all year roundTwo 10kW MHI cassettes holding a workshop at 18°CRead the case study →
Domestic across the West Midlands · commercial nationwide
Optimal Heating & Cooling AC & refrigeration specialists
Expert design and installation. Fixed prices, up to 10 years’ warranty and 24/7 breakdown cover.
Diamond PartnerUp to 10 years’ warranty
Fully insuredDomestic and commercial
4.9 from 126 reviewsOn Google
Instant prices
See your price in a minute
Tell us about your room. We’ll suggest the right size Mitsubishi Heavy Industries unit and show you two options with prices.
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Next, send us a few photos on WhatsApp: where the indoor unit will go, the outside wall behind it, and your fuse box. A member of our team will look at them and talk it through with you. If a site survey is needed, we’ll arrange it.
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Energy calculator
What does air conditioning cost to run?
Pennies an hour for a typical room, and three to four times more heat out than electricity in.
- 3–4× more heat out than electricity in
- Pennies an hour for a typical bedroom
9pper hour
75pper day
£22.50per 30 days
Not sure what you need?
Tell us about your room or building and an engineer will come back with a clear price.
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Professional engineers who clearly know their stuff. Our new air conditioning works perfectly.
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Fast response on a breakdown and fixed the same day. Highly recommended.
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Excellent service from start to finish. Quoted fairly, fitted quickly and left everything spotless.
Case studies
Recent projects
Real jobs for real businesses, with the problem, the solution and the result.
Industrial & laboratoryCTS: a constant 18°C all year roundTwo 10kW MHI cassettes holding a workshop at 18°CRead the case study →
Maintenance contractsNCP Birmingham Airport: planned maintenance contractTwo planned visits a year across a mixed estate of unitsRead the case study →
Offices & workplacesViperia Exotics: air conditioning for the offices7kW and 2.5kW MHI Premium systems, neatly installedRead the case study →