Mechanical, Electrical & Plumbing (MEP) Integrations in a Build
Delivering a high-performing home demands more than neat finishes. It depends on hidden systems that control comfort, safety, energy use and running costs. ARN Projects, led by Arron Dewhurst, works with designs, coordinates and installs Mechanical, Electrical and Plumbing (MEP) systems as a single integrated package for serviced custom home projects. The result is a home that feels effortless to live in, is simple to maintain and is cost-effective to run.
Integrated from Day One, Not Bolted on at the End
MEP success begins at pre-construction stage. ARN Projects brings HVAC design, plumbing layouts, electrical schematics and ventilation strategies together early, using coordinated drawings and clash detection to prevent rework. Ducts, pipework, containment, consumer units, manifolds and plant space are planned with the frame, not after it.
This upfront coordination protects the fabric, preserves airtightness and keeps the programme moving, with no site improvisation and no cost surprises.
HVAC That Balances Comfort and Efficiency
Heating and cooling is engineered to the building’s actual heat loss and gain, not rough estimates. ARN Projects specifies the right technology for the property and budget, whether that is a modern condensing boiler, air source heat pump (ASHP), hybrid system or zoned underfloor heating. Correct pipe sizing, flow temperatures and hydraulic balancing ensure consistent room-by-room comfort while reducing energy consumption.
Where cooling is required, discreet fan coils or split systems are positioned to avoid draughts and noise. Controls are intuitive, with programmable thermostats, smart zoning and weather compensation delivering comfort without constant adjustment. The outcome is stable temperatures, lower bills and better SAP and EPC performance.
Ventilation That Preserves Health and Airtightness
Tighter building envelopes demand controlled ventilation. ARN Projects designs and installs systems that refresh the home without wasting heat, from decentralised fans to whole-house MVHR (Mechanical Ventilation with Heat Recovery). Duct runs are short, smooth and airtight.
Silencers and attenuators help maintain low noise levels, while filters are accessible for easy replacement. Correct airflow commissioning prevents condensation and mould risk, protects finishes and safeguards indoor air quality, while meeting Part F requirements as standard.
Hot and Cold Water Systems Built to Last
Reliable plumbing starts with water quality and pressure. ARN Projects surveys incoming mains, specifies pressure-reducing valves where needed and protects the installation with WRAS-approved components.
Unvented hot water cylinders are sized to the dwelling’s peak demand so showers do not lose pressure when the kitchen tap is running. Where heat pumps are used, cylinders incorporate larger coils for efficient recovery.
Pipe routes are designed to minimise dead legs, reduce heat loss and avoid noise. Insulation is continuous, supports and clips are aligned, and all joints are pressure-tested. Legionella control, backflow prevention and scald protection are integrated into the design.
Drainage That Works Quietly in the Background
Waste and soil systems are calculated for flow and venting, with acoustic pipe used where appropriate. Stacks, traps and vent terminations are coordinated with the structure and envelope to avoid penetrations in the wrong places. Correct falls and access points make long-term maintenance straightforward. The result is quiet, odour-free performance for decades.
Electrical Infrastructure with Capacity for Tomorrow
Electrical design goes beyond having enough sockets. ARN Projects engineers safe, expandable systems that meet Part P and BS 7671 while leaving headroom for future technology. Consumer units with RCD and RCBO protection, correctly sized tails and earthing are standard. Distribution is zoned to reduce nuisance trips.
Containment, including tray, basket, trunking and conduit, is neatly set out, keeping low-voltage data such as Cat6, Cat6a and fibre separate from power and control to reduce interference.
Lighting is planned room by room. Luminous efficacy, colour rendering (CRI) and colour temperature are matched to use, with warm comfort in living spaces, neutral task lighting in kitchens and low-glare, dimmable scenes where needed. External lighting respects dark-sky principles while delivering security and safe access.
Smart Home, Sensible Choices
A smart home should be simple. ARN Projects integrates automation-ready house systems and controls for heating, lighting scenes, MVHR boost, blinds, security and AV without creating a maintenance headache. From app-free wall controls to whole-home systems and BMS integration, the approach is pragmatic.
Open standards are used where possible, local fail-safes are provided for critical functions and everything is fully documented. The homeowner gets heating, ventilation and whole-home performance that's convenient without lock-in.
Low-Carbon Options, Designed Not Decorated
If decarbonisation is a goal, it must be engineered properly. Heat pumps are matched to heat loss and emitters at low flow temperatures. Underfloor heating circuits and oversized radiators support efficient operation.
Solar PV can offset domestic loads or preheat cylinders, while battery storage can shave peaks and support EV charging. ARN Projects sequences these elements so they work together. Diverter valves, priority switching and sensible controls protect comfort while maximising renewable yield.
Fire, Life Safety and Compliance
Life safety is non-negotiable. Smoke and heat detection is designed to LD1 or LD2 as required. CO alarms protect areas with fuel-burning appliances. Where projects demand it, domestic sprinklers or water mist systems are coordinated with structure and ceiling layouts.
Penetrations through fire compartments are sealed with certified systems, and documentation is captured for compliance and handover.
Noise, Vibration and Comfort Engineering
Comfort is acoustic too. ARN Projects selects quiet fans and pumps, isolates plant from the structure and routes services away from bedrooms and quiet zones. Duct and pipe velocities are kept within recommended limits.
Attenuators, flexible connectors and anti-vibration mounts are used where necessary. The benefit is obvious: calm rooms, no humming cupboards and no whistling grilles.
Clean Plant Rooms and Future-Proof Access
Plant rooms and utility spaces are laid out to be practical to work in, with labelled valves and circuits, accessible strainers and filters, correct clearances around cylinders and heat pumps, and tidy cable management.
Condensate routing, drip trays and leak detection provide extra protection. A clean plant room is not cosmetic. It shortens fault-finding, reduces downtime and cuts maintenance costs.
Proper Commissioning, The Difference You Can Feel
Systems that are not commissioned properly will not perform as intended. ARN Projects follows a documented process that includes pressure testing, flushing and dosing of heating systems, electrical testing and certification, ventilation balancing with measured airflow, and heat pump set-up with correct curves and offsets.
Room-by-room checks confirm that design intent becomes lived reality. Handover includes O&M manuals, as-installed drawings, warranties and a clear guide for occupants.
Coordination with Structure and Envelope
Services should never compromise the fabric of the building. With careful detailing, ARN Projects maintains thermal continuity and airtightness at every penetration.
Service zones are respected, joist notches and drillings follow structural limits, and vapour control layers are resealed after first fix. The home keeps its designed performance because services have been integrated, not forced into place later.
Health, Safety and Programme Control
MEP works are sequenced to protect the programme. First fix follows frame readiness and takes place before insulation. Second fix aligns with decoration, while pre-commission checks help avoid last-minute delays. RAMS, permits to work and CDM duties are handled diligently.
Gas works are undertaken by Gas Safe engineers, and electrical certification is completed by NICEIC-approved contractors. The project stays safe, legal and on schedule.
Transparent Costs, No Nasty Surprises
Clients want clarity on the cost to build for MEP. ARN Projects breaks down budgets by discipline, including HVAC, plumbing, electrical and ventilation, and then by major components such as plant, distribution, controls, testing and commissioning.
Options are presented with lifecycle costs, not just upfront prices, so decisions can balance capital spend with running costs and maintenance. Value engineering is targeted to reduce complexity, not resilience.
Aftercare and Ongoing Optimisation
Great systems improve with refinement. Post-occupancy reviews and seasonal commissioning allow fine-tuning after the first winter or summer. Filters are changed on schedule, inhibitor levels are checked and firmware updates are applied where appropriate.
Small adjustments to pump speeds, flow temperatures and control set-points can yield noticeable improvements in comfort and energy use.
Frequently Asked Questions
How early should MEP design start?
At concept stage. Early coordination safeguards space for ducts, plant and risers, and prevents costly redesign once structure and envelope are fixed.
Is a heat pump always the best choice?
Not always. The right solution depends on heat loss, emitters, insulation levels, budget and grid capacity. ARN Projects models scenarios including condensing boilers, ASHP and hybrid systems to recommend the most efficient and reliable option for your home.
Do I need MVHR in a new build?
Highly airtight homes benefit significantly from MVHR, with better air quality, fewer draughts and heat recovery that lowers bills. In less airtight refurbishments, targeted demand-controlled ventilation may be more appropriate.
Will a smart home make things complicated?
It should not. ARN Projects prioritises simple, robust controls with clear wall interfaces and documented logic. Critical functions continue to work locally even if the internet goes down.
Can you integrate solar PV, batteries and EV charging?
Yes. Systems are designed to coordinate effectively. PV can prioritise hot water or battery storage, EV chargers can operate within supply limits, and monitoring shows what is being generated, stored and used in real time.
What certifications will I receive on completion?
Electrical installation certificates, Part P notification, unvented cylinder certification, Gas Safe notification where applicable, ventilation commissioning reports, and O&M manuals with as-installed drawings.